./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7 --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 2616f51a0d79e0bd682803708141b0dc94462ecdbaee78ea9cc6b43878e4310d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:09:03,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:09:03,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:09:03,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:09:03,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:09:03,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:09:03,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:09:03,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:09:03,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:09:03,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:09:03,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:09:03,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:09:03,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:09:03,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:09:03,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:09:03,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:09:03,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:09:03,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:09:03,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:09:03,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:09:03,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:09:03,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:09:03,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:09:03,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:09:03,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:09:03,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:09:03,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:09:03,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:09:03,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:09:03,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:09:03,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:09:03,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:09:03,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:09:03,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:09:03,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:09:03,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:09:03,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:09:03,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:09:03,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:09:03,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:09:03,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:09:03,696 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:09:03,744 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:09:03,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:09:03,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:09:03,745 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:09:03,746 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:09:03,746 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:09:03,746 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:09:03,746 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:09:03,746 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:09:03,747 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:09:03,748 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:09:03,748 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:09:03,748 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:09:03,748 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:09:03,749 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:09:03,749 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:09:03,749 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:09:03,749 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:09:03,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:09:03,751 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:09:03,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:09:03,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:09:03,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:09:03,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:09:03,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:09:03,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:09:03,754 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:09:03,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:09:03,754 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:09:03,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:09:03,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:09:03,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:09:03,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:09:03,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:09:03,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:09:03,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:09:03,756 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:09:03,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:09:03,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:09:03,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:09:03,757 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:09:03,757 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2616f51a0d79e0bd682803708141b0dc94462ecdbaee78ea9cc6b43878e4310d [2021-11-25 18:09:04,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:09:04,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:09:04,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:09:04,031 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:09:04,032 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:09:04,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2021-11-25 18:09:04,145 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/data/78c4eb7e9/3ac6660973554d7eb8d3d940f5061796/FLAG82899c6cf [2021-11-25 18:09:04,640 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:09:04,646 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2021-11-25 18:09:04,656 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/data/78c4eb7e9/3ac6660973554d7eb8d3d940f5061796/FLAG82899c6cf [2021-11-25 18:09:04,985 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/data/78c4eb7e9/3ac6660973554d7eb8d3d940f5061796 [2021-11-25 18:09:04,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:09:04,993 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:09:04,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:09:04,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:09:05,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:09:05,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:09:04" (1/1) ... [2021-11-25 18:09:05,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@140647e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:05, skipping insertion in model container [2021-11-25 18:09:05,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:09:04" (1/1) ... [2021-11-25 18:09:05,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:09:05,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:09:05,227 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_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c[525,538] [2021-11-25 18:09:05,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:09:05,264 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:09:05,274 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_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c[525,538] [2021-11-25 18:09:05,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:09:05,304 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:09:05,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:05 WrapperNode [2021-11-25 18:09:05,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:09:05,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:09:05,306 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:09:05,306 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:09:05,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:05" (1/1) ... [2021-11-25 18:09:05,319 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:05" (1/1) ... [2021-11-25 18:09:05,341 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-11-25 18:09:05,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:09:05,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:09:05,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:09:05,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:09:05,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:05" (1/1) ... [2021-11-25 18:09:05,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:05" (1/1) ... [2021-11-25 18:09:05,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:05" (1/1) ... [2021-11-25 18:09:05,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:05" (1/1) ... [2021-11-25 18:09:05,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:05" (1/1) ... [2021-11-25 18:09:05,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:05" (1/1) ... [2021-11-25 18:09:05,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:05" (1/1) ... [2021-11-25 18:09:05,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:09:05,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:09:05,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:09:05,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:09:05,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:05" (1/1) ... [2021-11-25 18:09:05,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:09:05,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:05,401 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:09:05,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:09:05,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:09:05,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:09:05,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:09:05,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:09:05,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:09:05,435 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:09:05,487 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:09:05,488 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:09:05,673 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:09:05,704 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:09:05,704 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:09:05,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:09:05 BoogieIcfgContainer [2021-11-25 18:09:05,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:09:05,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:09:05,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:09:05,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:09:05,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:09:04" (1/3) ... [2021-11-25 18:09:05,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32368900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:09:05, skipping insertion in model container [2021-11-25 18:09:05,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:05" (2/3) ... [2021-11-25 18:09:05,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32368900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:09:05, skipping insertion in model container [2021-11-25 18:09:05,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:09:05" (3/3) ... [2021-11-25 18:09:05,713 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound50.c [2021-11-25 18:09:05,727 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:09:05,727 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:09:05,780 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:09:05,787 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:09:05,787 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:09:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 18:09:05,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:09:05,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:05,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:05,809 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:05,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:05,815 INFO L85 PathProgramCache]: Analyzing trace with hash -678335095, now seen corresponding path program 1 times [2021-11-25 18:09:05,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:05,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986823585] [2021-11-25 18:09:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:05,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:05,963 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:05,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986823585] [2021-11-25 18:09:05,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986823585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:05,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:05,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:09:05,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47696276] [2021-11-25 18:09:05,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:05,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:09:05,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:05,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:09:06,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:09:06,002 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:08,044 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:08,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:08,045 INFO L93 Difference]: Finished difference Result 44 states and 78 transitions. [2021-11-25 18:09:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:09:08,150 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 18:09:08,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:08,158 INFO L225 Difference]: With dead ends: 44 [2021-11-25 18:09:08,158 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 18:09:08,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:09:08,166 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:08,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 18:09:08,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 18:09:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-25 18:09:08,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 18:09:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2021-11-25 18:09:08,206 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2021-11-25 18:09:08,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:08,207 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2021-11-25 18:09:08,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:08,207 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2021-11-25 18:09:08,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:09:08,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:08,208 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:08,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:09:08,209 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:08,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash 520368722, now seen corresponding path program 1 times [2021-11-25 18:09:08,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:08,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372388796] [2021-11-25 18:09:08,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:08,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:08,288 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:08,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372388796] [2021-11-25 18:09:08,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372388796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:08,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:08,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:09:08,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844156301] [2021-11-25 18:09:08,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:08,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:09:08,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:08,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:09:08,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:09:08,291 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:08,335 INFO L93 Difference]: Finished difference Result 42 states and 63 transitions. [2021-11-25 18:09:08,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:09:08,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 18:09:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:08,337 INFO L225 Difference]: With dead ends: 42 [2021-11-25 18:09:08,337 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 18:09:08,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:09:08,340 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:08,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:09:08,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 18:09:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-25 18:09:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 18:09:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2021-11-25 18:09:08,349 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 9 [2021-11-25 18:09:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:08,349 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2021-11-25 18:09:08,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2021-11-25 18:09:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:09:08,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:08,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:08,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:09:08,351 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:08,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:08,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1389535714, now seen corresponding path program 1 times [2021-11-25 18:09:08,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:08,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719113427] [2021-11-25 18:09:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:08,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:08,372 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:09:08,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209947984] [2021-11-25 18:09:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:08,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:08,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:08,377 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:09:08,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:09:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:08,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:09:08,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:08,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:09:08,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:08,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719113427] [2021-11-25 18:09:08,548 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:09:08,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209947984] [2021-11-25 18:09:08,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209947984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:08,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:08,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:09:08,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918560360] [2021-11-25 18:09:08,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:08,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:09:08,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:08,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:09:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:09:08,557 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:10,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:10,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:10,722 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2021-11-25 18:09:10,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:09:10,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 18:09:10,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:10,724 INFO L225 Difference]: With dead ends: 37 [2021-11-25 18:09:10,724 INFO L226 Difference]: Without dead ends: 28 [2021-11-25 18:09:10,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:09:10,726 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:10,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 86 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 18:09:10,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-25 18:09:10,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-25 18:09:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 18:09:10,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2021-11-25 18:09:10,734 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 10 [2021-11-25 18:09:10,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:10,734 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2021-11-25 18:09:10,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:10,734 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2021-11-25 18:09:10,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:09:10,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:10,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:10,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 18:09:10,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:10,937 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:10,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:10,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1388046164, now seen corresponding path program 1 times [2021-11-25 18:09:10,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:10,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547698204] [2021-11-25 18:09:10,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:10,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:11,214 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:11,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547698204] [2021-11-25 18:09:11,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547698204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:11,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:11,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:09:11,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400165752] [2021-11-25 18:09:11,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:11,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:09:11,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:11,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:09:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:09:11,221 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:24,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 13.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-25 18:09:26,693 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-25 18:09:28,860 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:28,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:28,998 INFO L93 Difference]: Finished difference Result 59 states and 89 transitions. [2021-11-25 18:09:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:09:29,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 18:09:29,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:29,002 INFO L225 Difference]: With dead ends: 59 [2021-11-25 18:09:29,002 INFO L226 Difference]: Without dead ends: 39 [2021-11-25 18:09:29,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:09:29,004 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:29,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 160 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 3 Unknown, 0 Unchecked, 17.7s Time] [2021-11-25 18:09:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-25 18:09:29,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-25 18:09:29,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-25 18:09:29,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 56 transitions. [2021-11-25 18:09:29,018 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 56 transitions. Word has length 10 [2021-11-25 18:09:29,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:29,019 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 56 transitions. [2021-11-25 18:09:29,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:29,019 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 56 transitions. [2021-11-25 18:09:29,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 18:09:29,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:29,020 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:29,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:09:29,021 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:29,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:29,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1970023331, now seen corresponding path program 1 times [2021-11-25 18:09:29,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:29,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137994686] [2021-11-25 18:09:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:29,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:29,058 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:09:29,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111558719] [2021-11-25 18:09:29,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:29,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:29,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:29,077 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:09:29,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:09:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:29,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:09:29,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:29,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:09:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:29,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:29,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137994686] [2021-11-25 18:09:29,290 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:09:29,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111558719] [2021-11-25 18:09:29,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111558719] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:09:29,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1247623442] [2021-11-25 18:09:29,326 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:09:29,327 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:09:29,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:09:29,336 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:09:29,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:09:29,750 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 14 for LOIs [2021-11-25 18:09:29,759 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:09:30,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1247623442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:30,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:09:30,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4] total 15 [2021-11-25 18:09:30,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902591263] [2021-11-25 18:09:30,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:30,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:09:30,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:30,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:09:30,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:09:30,027 INFO L87 Difference]: Start difference. First operand 39 states and 56 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:32,688 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:32,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:32,874 INFO L93 Difference]: Finished difference Result 78 states and 117 transitions. [2021-11-25 18:09:32,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:09:32,874 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 18:09:32,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:32,876 INFO L225 Difference]: With dead ends: 78 [2021-11-25 18:09:32,877 INFO L226 Difference]: Without dead ends: 59 [2021-11-25 18:09:32,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:09:32,878 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:32,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 100 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 150 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 18:09:32,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-25 18:09:32,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2021-11-25 18:09:32,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 18:09:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2021-11-25 18:09:32,894 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 12 [2021-11-25 18:09:32,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:32,894 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2021-11-25 18:09:32,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:32,894 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2021-11-25 18:09:32,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:09:32,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:32,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:32,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:33,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:33,120 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:33,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:33,121 INFO L85 PathProgramCache]: Analyzing trace with hash 600084205, now seen corresponding path program 1 times [2021-11-25 18:09:33,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:33,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014831622] [2021-11-25 18:09:33,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:33,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:33,132 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:09:33,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071206402] [2021-11-25 18:09:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:33,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:33,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:33,138 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:09:33,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:09:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:33,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:09:33,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:33,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:09:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:33,368 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:33,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014831622] [2021-11-25 18:09:33,368 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:09:33,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071206402] [2021-11-25 18:09:33,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071206402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:09:33,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [774450822] [2021-11-25 18:09:33,371 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:09:33,371 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:09:33,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:09:33,372 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:09:33,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:09:33,611 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2021-11-25 18:09:33,618 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:09:34,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [774450822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:34,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:09:34,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 5] total 17 [2021-11-25 18:09:34,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521080895] [2021-11-25 18:09:34,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:34,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:09:34,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:34,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:09:34,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:09:34,002 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:38,055 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:38,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:38,261 INFO L93 Difference]: Finished difference Result 68 states and 96 transitions. [2021-11-25 18:09:38,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:09:38,262 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 18:09:38,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:38,263 INFO L225 Difference]: With dead ends: 68 [2021-11-25 18:09:38,263 INFO L226 Difference]: Without dead ends: 65 [2021-11-25 18:09:38,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:09:38,265 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:38,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 107 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 176 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-25 18:09:38,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-25 18:09:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2021-11-25 18:09:38,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 30 states have internal predecessors, (34), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 18:09:38,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2021-11-25 18:09:38,292 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 13 [2021-11-25 18:09:38,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:38,293 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2021-11-25 18:09:38,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:38,293 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2021-11-25 18:09:38,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:09:38,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:38,294 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:38,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:38,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:38,521 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:38,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:38,522 INFO L85 PathProgramCache]: Analyzing trace with hash 601573755, now seen corresponding path program 1 times [2021-11-25 18:09:38,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:38,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814925895] [2021-11-25 18:09:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:38,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:38,774 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:38,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814925895] [2021-11-25 18:09:38,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814925895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:09:38,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921424186] [2021-11-25 18:09:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:38,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:38,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:38,781 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:09:38,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:09:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:38,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:09:38,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:39,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:09:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:39,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921424186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:09:39,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [462232722] [2021-11-25 18:09:39,230 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:09:39,230 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:09:39,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:09:39,230 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:09:39,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:09:39,474 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2021-11-25 18:09:39,516 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:09:40,194 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1143#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (< ~counter~0 51) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:09:40,194 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:09:40,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:09:40,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2021-11-25 18:09:40,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305866229] [2021-11-25 18:09:40,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:09:40,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 18:09:40,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:40,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 18:09:40,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:09:40,197 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:43,608 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:46,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:47,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:47,518 INFO L93 Difference]: Finished difference Result 92 states and 133 transitions. [2021-11-25 18:09:47,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:09:47,518 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 18:09:47,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:47,519 INFO L225 Difference]: With dead ends: 92 [2021-11-25 18:09:47,520 INFO L226 Difference]: Without dead ends: 65 [2021-11-25 18:09:47,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-11-25 18:09:47,521 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 42 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 96 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:47,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 404 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 189 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2021-11-25 18:09:47,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-25 18:09:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-11-25 18:09:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 28 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-25 18:09:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 93 transitions. [2021-11-25 18:09:47,536 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 93 transitions. Word has length 13 [2021-11-25 18:09:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:47,537 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 93 transitions. [2021-11-25 18:09:47,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 93 transitions. [2021-11-25 18:09:47,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 18:09:47,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:47,538 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:47,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:47,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:47,765 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:47,766 INFO L85 PathProgramCache]: Analyzing trace with hash -339513844, now seen corresponding path program 1 times [2021-11-25 18:09:47,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:47,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474966431] [2021-11-25 18:09:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:47,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:47,772 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:09:47,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031021678] [2021-11-25 18:09:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:47,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:47,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:47,773 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:09:47,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:09:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:47,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:09:47,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:09:47,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:09:47,995 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:47,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474966431] [2021-11-25 18:09:47,996 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:09:47,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031021678] [2021-11-25 18:09:47,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031021678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:47,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:47,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:09:47,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373712130] [2021-11-25 18:09:47,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:47,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:09:47,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:47,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:09:47,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:09:47,998 INFO L87 Difference]: Start difference. First operand 64 states and 93 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:09:48,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:48,496 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2021-11-25 18:09:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:09:48,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-25 18:09:48,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:48,498 INFO L225 Difference]: With dead ends: 75 [2021-11-25 18:09:48,498 INFO L226 Difference]: Without dead ends: 51 [2021-11-25 18:09:48,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:09:48,499 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:48,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 109 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:09:48,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-25 18:09:48,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-25 18:09:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-25 18:09:48,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 74 transitions. [2021-11-25 18:09:48,509 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 74 transitions. Word has length 20 [2021-11-25 18:09:48,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:48,509 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 74 transitions. [2021-11-25 18:09:48,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:09:48,510 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 74 transitions. [2021-11-25 18:09:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 18:09:48,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:48,511 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:48,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-25 18:09:48,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:48,736 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:48,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:48,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1744099301, now seen corresponding path program 1 times [2021-11-25 18:09:48,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:48,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001520054] [2021-11-25 18:09:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:48,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:48,753 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:09:48,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502093234] [2021-11-25 18:09:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:48,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:48,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:48,757 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:09:48,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:09:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:48,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:09:48,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:09:48,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:09:48,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:48,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001520054] [2021-11-25 18:09:48,958 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:09:48,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502093234] [2021-11-25 18:09:48,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502093234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:48,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:48,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:09:48,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853439161] [2021-11-25 18:09:48,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:48,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:09:48,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:48,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:09:48,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:09:48,960 INFO L87 Difference]: Start difference. First operand 51 states and 74 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:09:51,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-25 18:09:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:51,398 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2021-11-25 18:09:51,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:09:51,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-11-25 18:09:51,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:51,400 INFO L225 Difference]: With dead ends: 61 [2021-11-25 18:09:51,400 INFO L226 Difference]: Without dead ends: 58 [2021-11-25 18:09:51,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:09:51,401 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:51,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 120 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 18:09:51,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-25 18:09:51,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2021-11-25 18:09:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-25 18:09:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2021-11-25 18:09:51,410 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 23 [2021-11-25 18:09:51,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:51,411 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2021-11-25 18:09:51,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:09:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2021-11-25 18:09:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 18:09:51,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:51,413 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:51,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:51,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:51,616 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:51,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:51,617 INFO L85 PathProgramCache]: Analyzing trace with hash -787687870, now seen corresponding path program 1 times [2021-11-25 18:09:51,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:51,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379218113] [2021-11-25 18:09:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:51,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:51,627 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:09:51,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780157099] [2021-11-25 18:09:51,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:51,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:51,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:51,644 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:09:51,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:09:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:51,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:09:51,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 18:09:51,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:09:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 18:09:52,053 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:52,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379218113] [2021-11-25 18:09:52,053 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:09:52,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780157099] [2021-11-25 18:09:52,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780157099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:09:52,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1805176811] [2021-11-25 18:09:52,056 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-25 18:09:52,057 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:09:52,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:09:52,057 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:09:52,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:13:17,881 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2021-11-25 18:13:17,984 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:15:18,905 WARN L227 SmtUtils]: Spent 1.78m on a formula simplification. DAG size of input: 275 DAG size of output: 267 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:16:50,790 WARN L227 SmtUtils]: Spent 1.38m on a formula simplification. DAG size of input: 282 DAG size of output: 270 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:16:57,980 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (<= 2 c_~counter~0)) (.cse1 (<= 0 |c_#NULL.base|)) (.cse3 (<= c_~counter~0 51)) (.cse4 (<= |c_#NULL.offset| 0)) (.cse5 (<= 0 |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1|)) (.cse6 (<= 0 |c_ULTIMATE.start_assume_abort_if_not_~cond#1|)) (.cse8 (<= |c_#NULL.base| 0)) (.cse9 (<= 0 |c_#NULL.offset|)) (.cse10 (<= |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1)) (.cse11 (<= 0 |c_#StackHeapBarrier|)) (.cse12 (<= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 1))) (and .cse0 .cse1 (let ((.cse2 (not (= (ite (< (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0))) (.cse7 (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) (mod (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0)))) (or (and .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 (<= 3 c_~counter~0)) (and (<= 0 |c_ULTIMATE.start_main_~h~0#1|) .cse0 .cse1 .cse2 (<= |c_ULTIMATE.start_main_~p~0#1| 0) .cse3 (<= |c_ULTIMATE.start_main_~h~0#1| 0) .cse4 (<= 0 |c_ULTIMATE.start_main_~p~0#1|) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12))) .cse3 .cse4 .cse5 .cse6 .cse8 .cse9 .cse10 .cse11 .cse12)) is different from false [2021-11-25 18:18:13,658 WARN L227 SmtUtils]: Spent 1.09m on a formula simplification. DAG size of input: 87 DAG size of output: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:20:12,666 WARN L227 SmtUtils]: Spent 1.58m on a formula simplification. DAG size of input: 117 DAG size of output: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:21:56,797 WARN L227 SmtUtils]: Spent 1.31m on a formula simplification. DAG size of input: 136 DAG size of output: 136 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:22:17,297 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (<= 0 |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1|)) (.cse1 (<= 0 |c_ULTIMATE.start_assume_abort_if_not_~cond#1|)) (.cse2 (<= 51 c_~counter~0)) (.cse52 (<= |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1)) (.cse53 (<= 0 |c_#StackHeapBarrier|)) (.cse54 (<= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 1))) (or (and (<= c_~counter~0 52) (<= 0 |c_#NULL.base|) (<= |c_#NULL.offset| 0) .cse0 .cse1 (<= |c_#NULL.base| 0) .cse2 (exists ((|aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| Int) (|aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| Int)) (let ((.cse4 (* 4 |c_ULTIMATE.start_main_~q~0#1|)) (.cse3 (+ (* 4294967296 |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111|) |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111|))) (and (< .cse3 (+ .cse4 4)) (<= 0 .cse3) (<= .cse4 .cse3) (<= 0 |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111|) (let ((.cse29 (mod |c_ULTIMATE.start_main_~h~0#1| 4294967296)) (.cse15 (<= |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~h~0#1|)) (.cse16 (<= |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse27 (mod (+ (* |c_ULTIMATE.start_main_~q~0#1| 4294967294) |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| (* |c_ULTIMATE.start_main_~h~0#1| 2)) 4294967296)) (.cse28 (div (mod (+ (* |c_ULTIMATE.start_main_~q~0#1| 4294967295) |c_ULTIMATE.start_main_~h~0#1|) 4294967296) 2))) (or (let ((.cse26 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (and (let ((.cse14 (not (= (ite (< .cse26 .cse27) 1 0) 0)))) (or (and (exists ((|v_ULTIMATE.start_main_~h~0#1_30| Int) (|aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| Int)) (let ((.cse8 (+ |c_ULTIMATE.start_main_~h~0#1| (* |c_ULTIMATE.start_main_~q~0#1| (- 1)))) (.cse6 (+ (* |aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| 4294967296) (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4294967296) |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111|)) (.cse5 (* |v_ULTIMATE.start_main_~h~0#1_30| 4))) (let ((.cse7 (* .cse5 |c_ULTIMATE.start_main_~n~0#1|)) (.cse9 (* (+ (* |c_ULTIMATE.start_main_~h~0#1| 4) (* |c_ULTIMATE.start_main_~q~0#1| (- 4))) .cse6)) (.cse10 (* |v_ULTIMATE.start_main_~h~0#1_30| |v_ULTIMATE.start_main_~h~0#1_30|)) (.cse11 (* |c_ULTIMATE.start_main_~n~0#1| .cse6)) (.cse12 (* .cse8 .cse8))) (and (not (= (ite (= (mod (+ (* (* .cse5 .cse6) |c_ULTIMATE.start_main_~r~0#1|) (* (* .cse7 .cse6) 4294967295) (* (* (* .cse8 .cse6) .cse6) 4294967295) (* (* (* |c_ULTIMATE.start_main_~n~0#1| 4) .cse8) .cse6) (* (* .cse9 |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* .cse10 .cse8)) 4294967296) 0) 1 0) 0)) (not (= (ite (= (mod (+ (* (* .cse5 .cse8) |c_ULTIMATE.start_main_~r~0#1|) (* (* .cse10 |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* (* (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1|) 4) .cse6) (* (* .cse6 .cse6) |c_ULTIMATE.start_main_~r~0#1|) (* (* .cse7 .cse8) 4294967295) (* .cse10 |c_ULTIMATE.start_main_~n~0#1|) (* (* .cse11 .cse6) 4294967295) (* (* (+ (* |aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| 17179869184) (* |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4) (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 17179869184)) |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~r~0#1|) (* (* (* (* |c_ULTIMATE.start_main_~n~0#1| 8) .cse6) |c_ULTIMATE.start_main_~r~0#1|) 4294967295)) 4294967296) 0) 1 0) 0)) (not (= 0 (ite (= (mod (+ (* .cse11 4294967295) .cse12 (* .cse6 |c_ULTIMATE.start_main_~r~0#1|)) 4294967296) 0) 1 0))) (not (= (ite (= (mod (let ((.cse13 (* |v_ULTIMATE.start_main_~h~0#1_30| 12))) (+ (* (* (* |c_ULTIMATE.start_main_~n~0#1| 16) .cse8) .cse6) (* (* (* |v_ULTIMATE.start_main_~h~0#1_30| .cse6) .cse6) 4294967295) (* (* (* (+ (* |c_ULTIMATE.start_main_~q~0#1| (- 16)) (* |c_ULTIMATE.start_main_~h~0#1| 16)) .cse6) |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* (* .cse9 .cse6) 4294967295) (* (* (* .cse13 |c_ULTIMATE.start_main_~n~0#1|) .cse6) 4294967295) (* (* .cse13 .cse6) |c_ULTIMATE.start_main_~r~0#1|) (* .cse10 |v_ULTIMATE.start_main_~h~0#1_30|))) 4294967296) 0) 1 0) 0)) (not (= (ite (= (mod .cse11 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~r~0#1| .cse6) .cse12) 4294967296)) 1 0) 0)))))) .cse14) (and .cse15 .cse16 (exists ((|v_ULTIMATE.start_main_~h~0#1_30| Int) (|aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| Int)) (let ((.cse20 (+ |c_ULTIMATE.start_main_~h~0#1| (* |c_ULTIMATE.start_main_~q~0#1| (- 1)))) (.cse18 (+ (* |aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| 4294967296) (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4294967296) |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111|)) (.cse17 (* |v_ULTIMATE.start_main_~h~0#1_30| 4))) (let ((.cse19 (* .cse17 |c_ULTIMATE.start_main_~n~0#1|)) (.cse21 (* (+ (* |c_ULTIMATE.start_main_~h~0#1| 4) (* |c_ULTIMATE.start_main_~q~0#1| (- 4))) .cse18)) (.cse22 (* |v_ULTIMATE.start_main_~h~0#1_30| |v_ULTIMATE.start_main_~h~0#1_30|)) (.cse23 (* |c_ULTIMATE.start_main_~n~0#1| .cse18)) (.cse24 (* .cse20 .cse20))) (and (not (= (ite (= (mod (+ (* (* .cse17 .cse18) |c_ULTIMATE.start_main_~r~0#1|) (* (* .cse19 .cse18) 4294967295) (* (* (* .cse20 .cse18) .cse18) 4294967295) (* (* (* |c_ULTIMATE.start_main_~n~0#1| 4) .cse20) .cse18) (* (* .cse21 |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* .cse22 .cse20)) 4294967296) 0) 1 0) 0)) (not (= (ite (= (mod (+ (* (* .cse17 .cse20) |c_ULTIMATE.start_main_~r~0#1|) (* (* .cse22 |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* (* (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1|) 4) .cse18) (* (* .cse18 .cse18) |c_ULTIMATE.start_main_~r~0#1|) (* (* .cse19 .cse20) 4294967295) (* .cse22 |c_ULTIMATE.start_main_~n~0#1|) (* (* .cse23 .cse18) 4294967295) (* (* (+ (* |aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| 17179869184) (* |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4) (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 17179869184)) |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~r~0#1|) (* (* (* (* |c_ULTIMATE.start_main_~n~0#1| 8) .cse18) |c_ULTIMATE.start_main_~r~0#1|) 4294967295)) 4294967296) 0) 1 0) 0)) (not (= 0 (ite (= (mod (+ (* .cse23 4294967295) .cse24 (* .cse18 |c_ULTIMATE.start_main_~r~0#1|)) 4294967296) 0) 1 0))) (not (= (ite (= (mod (let ((.cse25 (* |v_ULTIMATE.start_main_~h~0#1_30| 12))) (+ (* (* (* |c_ULTIMATE.start_main_~n~0#1| 16) .cse20) .cse18) (* (* (* |v_ULTIMATE.start_main_~h~0#1_30| .cse18) .cse18) 4294967295) (* (* (* (+ (* |c_ULTIMATE.start_main_~q~0#1| (- 16)) (* |c_ULTIMATE.start_main_~h~0#1| 16)) .cse18) |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* (* .cse21 .cse18) 4294967295) (* (* (* .cse25 |c_ULTIMATE.start_main_~n~0#1|) .cse18) 4294967295) (* (* .cse25 .cse18) |c_ULTIMATE.start_main_~r~0#1|) (* .cse22 |v_ULTIMATE.start_main_~h~0#1_30|))) 4294967296) 0) 1 0) 0)) (<= |v_ULTIMATE.start_main_~h~0#1_30| 0) (not (= (ite (= (mod .cse23 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~r~0#1| .cse18) .cse24) 4294967296)) 1 0) 0)) (<= 0 |v_ULTIMATE.start_main_~h~0#1_30|))))) .cse14))) (= .cse28 |c_ULTIMATE.start_main_~p~0#1|) (< .cse26 .cse29))) (let ((.cse30 (mod (+ |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1|) 4294967296))) (and (<= .cse29 .cse30) (let ((.cse31 (not (= (ite (< .cse30 .cse27) 1 0) 0)))) (or (and .cse15 .cse31 .cse16 (exists ((|v_ULTIMATE.start_main_~h~0#1_30| Int) (|aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| Int)) (let ((.cse41 (* |v_ULTIMATE.start_main_~h~0#1_30| 4)) (.cse34 (+ (* |aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| 4294967296) (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4294967296) |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111|)) (.cse37 (+ |c_ULTIMATE.start_main_~h~0#1| (* |c_ULTIMATE.start_main_~q~0#1| (- 1))))) (let ((.cse33 (* .cse37 .cse37)) (.cse32 (* |c_ULTIMATE.start_main_~n~0#1| .cse34)) (.cse40 (* .cse41 |c_ULTIMATE.start_main_~n~0#1|)) (.cse38 (* (+ (* |c_ULTIMATE.start_main_~h~0#1| 4) (* |c_ULTIMATE.start_main_~q~0#1| (- 4))) .cse34)) (.cse35 (+ |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse39 (* |v_ULTIMATE.start_main_~h~0#1_30| |v_ULTIMATE.start_main_~h~0#1_30|))) (and (not (= (ite (= (mod (+ (* .cse32 4294967295) .cse33 (* .cse34 .cse35)) 4294967296) 0) 1 0) 0)) (not (= (ite (= 0 (mod (let ((.cse36 (* |v_ULTIMATE.start_main_~h~0#1_30| 12))) (+ (* (* .cse36 .cse34) .cse35) (* (* (* |c_ULTIMATE.start_main_~n~0#1| 16) .cse37) .cse34) (* (* (* |v_ULTIMATE.start_main_~h~0#1_30| .cse34) .cse34) 4294967295) (* (* .cse38 .cse34) 4294967295) (* (* (* .cse36 |c_ULTIMATE.start_main_~n~0#1|) .cse34) 4294967295) (* .cse39 |v_ULTIMATE.start_main_~h~0#1_30|) (* (* (* (+ (* |c_ULTIMATE.start_main_~q~0#1| (- 16)) (* |c_ULTIMATE.start_main_~h~0#1| 16)) .cse34) .cse35) 4294967295))) 4294967296)) 1 0) 0)) (not (= (ite (= (mod .cse32 4294967296) (mod (+ .cse33 (* .cse35 .cse34)) 4294967296)) 1 0) 0)) (<= |v_ULTIMATE.start_main_~h~0#1_30| 0) (not (= (ite (= (mod (+ (* (* (+ (* |aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| 17179869184) (* |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4) (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 17179869184)) .cse35) .cse35) (* (* (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1|) 4) .cse34) (* (* .cse40 .cse37) 4294967295) (* .cse39 |c_ULTIMATE.start_main_~n~0#1|) (* (* .cse41 .cse37) .cse35) (* (* .cse32 .cse34) 4294967295) (* (* .cse39 .cse35) 4294967295) (* (* (* (* |c_ULTIMATE.start_main_~n~0#1| 8) .cse34) .cse35) 4294967295) (* (* .cse34 .cse34) .cse35)) 4294967296) 0) 1 0) 0)) (not (= (ite (= (mod (+ (* (* .cse41 .cse34) .cse35) (* (* .cse40 .cse34) 4294967295) (* (* (* .cse37 .cse34) .cse34) 4294967295) (* (* (* |c_ULTIMATE.start_main_~n~0#1| 4) .cse37) .cse34) (* (* .cse38 .cse35) 4294967295) (* .cse39 .cse37)) 4294967296) 0) 1 0) 0)) (<= 0 |v_ULTIMATE.start_main_~h~0#1_30|)))))) (and .cse31 (exists ((|v_ULTIMATE.start_main_~h~0#1_30| Int) (|aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| Int)) (let ((.cse51 (* |v_ULTIMATE.start_main_~h~0#1_30| 4)) (.cse44 (+ (* |aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| 4294967296) (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4294967296) |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111|)) (.cse47 (+ |c_ULTIMATE.start_main_~h~0#1| (* |c_ULTIMATE.start_main_~q~0#1| (- 1))))) (let ((.cse43 (* .cse47 .cse47)) (.cse42 (* |c_ULTIMATE.start_main_~n~0#1| .cse44)) (.cse50 (* .cse51 |c_ULTIMATE.start_main_~n~0#1|)) (.cse48 (* (+ (* |c_ULTIMATE.start_main_~h~0#1| 4) (* |c_ULTIMATE.start_main_~q~0#1| (- 4))) .cse44)) (.cse45 (+ |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse49 (* |v_ULTIMATE.start_main_~h~0#1_30| |v_ULTIMATE.start_main_~h~0#1_30|))) (and (not (= (ite (= (mod (+ (* .cse42 4294967295) .cse43 (* .cse44 .cse45)) 4294967296) 0) 1 0) 0)) (not (= (ite (= 0 (mod (let ((.cse46 (* |v_ULTIMATE.start_main_~h~0#1_30| 12))) (+ (* (* .cse46 .cse44) .cse45) (* (* (* |c_ULTIMATE.start_main_~n~0#1| 16) .cse47) .cse44) (* (* (* |v_ULTIMATE.start_main_~h~0#1_30| .cse44) .cse44) 4294967295) (* (* .cse48 .cse44) 4294967295) (* (* (* .cse46 |c_ULTIMATE.start_main_~n~0#1|) .cse44) 4294967295) (* .cse49 |v_ULTIMATE.start_main_~h~0#1_30|) (* (* (* (+ (* |c_ULTIMATE.start_main_~q~0#1| (- 16)) (* |c_ULTIMATE.start_main_~h~0#1| 16)) .cse44) .cse45) 4294967295))) 4294967296)) 1 0) 0)) (not (= (ite (= (mod .cse42 4294967296) (mod (+ .cse43 (* .cse45 .cse44)) 4294967296)) 1 0) 0)) (not (= (ite (= (mod (+ (* (* (+ (* |aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| 17179869184) (* |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4) (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 17179869184)) .cse45) .cse45) (* (* (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1|) 4) .cse44) (* (* .cse50 .cse47) 4294967295) (* .cse49 |c_ULTIMATE.start_main_~n~0#1|) (* (* .cse51 .cse47) .cse45) (* (* .cse42 .cse44) 4294967295) (* (* .cse49 .cse45) 4294967295) (* (* (* (* |c_ULTIMATE.start_main_~n~0#1| 8) .cse44) .cse45) 4294967295) (* (* .cse44 .cse44) .cse45)) 4294967296) 0) 1 0) 0)) (not (= (ite (= (mod (+ (* (* .cse51 .cse44) .cse45) (* (* .cse50 .cse44) 4294967295) (* (* (* .cse47 .cse44) .cse44) 4294967295) (* (* (* |c_ULTIMATE.start_main_~n~0#1| 4) .cse47) .cse44) (* (* .cse48 .cse45) 4294967295) (* .cse49 .cse47)) 4294967296) 0) 1 0) 0))))))))) (= (+ .cse28 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|))))) (< |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4294967296) (not (= |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 1)) (< .cse3 4294967296)))) (<= 0 |c_#NULL.offset|) .cse52 .cse53 .cse54) (and (= |c_ULTIMATE.start_main_~p~0#1| 0) (= |c_ULTIMATE.start_main_~h~0#1| 0) .cse0 .cse1 .cse2 (< c_~counter~0 52) (= |c_#NULL.offset| 0) (< (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296) (mod |c_ULTIMATE.start_main_~q~0#1| 4294967296)) .cse52 .cse53 .cse54 (= |c_#NULL.base| 0)))) is different from false [2021-11-25 18:22:17,312 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2166#(and (<= 2 ~counter~0) (<= ~counter~0 52) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 18:22:17,312 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:17,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:22:17,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-11-25 18:22:17,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775205369] [2021-11-25 18:22:17,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:17,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:22:17,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:17,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:22:17,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=518, Unknown=35, NotChecked=98, Total=756 [2021-11-25 18:22:17,316 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-25 18:22:19,077 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-25 18:22:23,511 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:22:26,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-25 18:22:28,306 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:22:31,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:22:34,077 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:22:37,076 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:22:39,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:22:42,463 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-25 18:22:44,554 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-25 18:22:44,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:44,555 INFO L93 Difference]: Finished difference Result 255 states and 327 transitions. [2021-11-25 18:22:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 18:22:44,556 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 46 [2021-11-25 18:22:44,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:44,559 INFO L225 Difference]: With dead ends: 255 [2021-11-25 18:22:44,559 INFO L226 Difference]: Without dead ends: 246 [2021-11-25 18:22:44,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 539.7s TimeCoverageRelationStatistics Valid=147, Invalid=756, Unknown=35, NotChecked=118, Total=1056 [2021-11-25 18:22:44,560 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 139 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 84 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:44,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 237 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 157 Invalid, 8 Unknown, 0 Unchecked, 26.9s Time] [2021-11-25 18:22:44,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-25 18:22:44,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 232. [2021-11-25 18:22:44,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 132 states have internal predecessors, (144), 81 states have call successors, (81), 23 states have call predecessors, (81), 23 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2021-11-25 18:22:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 301 transitions. [2021-11-25 18:22:44,594 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 301 transitions. Word has length 46 [2021-11-25 18:22:44,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:44,595 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 301 transitions. [2021-11-25 18:22:44,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-25 18:22:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 301 transitions. [2021-11-25 18:22:44,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 18:22:44,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:44,599 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:22:44,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:44,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:22:44,813 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:44,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:44,814 INFO L85 PathProgramCache]: Analyzing trace with hash -786198320, now seen corresponding path program 1 times [2021-11-25 18:22:44,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:44,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747068939] [2021-11-25 18:22:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:44,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:44,827 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:22:44,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478826868] [2021-11-25 18:22:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:44,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:44,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:44,842 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:44,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0b50085-ea94-40e9-94be-e2f4ccfc53cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process