./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/Mono3_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/Mono3_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur --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 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:31:12,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:31:12,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:31:12,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:31:12,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:31:12,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:31:12,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:31:12,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:31:12,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:31:12,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:31:12,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:31:12,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:31:12,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:31:12,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:31:12,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:31:12,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:31:12,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:31:12,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:31:12,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:31:12,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:31:12,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:31:12,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:31:12,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:31:12,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:31:12,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:31:12,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:31:12,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:31:12,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:31:12,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:31:12,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:31:12,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:31:12,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:31:12,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:31:12,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:31:12,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:31:12,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:31:12,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:31:12,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:31:12,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:31:12,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:31:12,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:31:12,482 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:31:12,525 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:31:12,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:31:12,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:31:12,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:31:12,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:31:12,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:31:12,527 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:31:12,527 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:31:12,527 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:31:12,527 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:31:12,528 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:31:12,528 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:31:12,528 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:31:12,528 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:31:12,528 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:31:12,529 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:31:12,529 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:31:12,529 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:31:12,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:31:12,534 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:31:12,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:31:12,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:31:12,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:31:12,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:31:12,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:31:12,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:31:12,535 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:31:12,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:31:12,536 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:31:12,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:31:12,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:31:12,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:31:12,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:31:12,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:31:12,538 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:31:12,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:31:12,539 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:31:12,539 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:31:12,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:31:12,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:31:12,540 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:31:12,540 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 [2022-11-25 23:31:12,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:31:12,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:31:12,844 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:31:12,845 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:31:12,846 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:31:12,847 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2022-11-25 23:31:15,894 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:31:16,141 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:31:16,142 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2022-11-25 23:31:16,148 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/data/ed7552c20/6b9c4c09bf1f4ca3bae9b6284df404ea/FLAG821026605 [2022-11-25 23:31:16,164 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/data/ed7552c20/6b9c4c09bf1f4ca3bae9b6284df404ea [2022-11-25 23:31:16,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:31:16,169 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:31:16,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:31:16,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:31:16,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:31:16,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:31:16" (1/1) ... [2022-11-25 23:31:16,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c47afff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:16, skipping insertion in model container [2022-11-25 23:31:16,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:31:16" (1/1) ... [2022-11-25 23:31:16,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:31:16,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:31:16,346 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/sv-benchmarks/c/loops-crafted-1/Mono3_1.c[311,324] [2022-11-25 23:31:16,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:31:16,367 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:31:16,377 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/sv-benchmarks/c/loops-crafted-1/Mono3_1.c[311,324] [2022-11-25 23:31:16,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:31:16,394 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:31:16,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:16 WrapperNode [2022-11-25 23:31:16,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:31:16,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:31:16,396 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:31:16,396 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:31:16,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:16" (1/1) ... [2022-11-25 23:31:16,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:16" (1/1) ... [2022-11-25 23:31:16,426 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2022-11-25 23:31:16,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:31:16,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:31:16,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:31:16,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:31:16,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:16" (1/1) ... [2022-11-25 23:31:16,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:16" (1/1) ... [2022-11-25 23:31:16,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:16" (1/1) ... [2022-11-25 23:31:16,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:16" (1/1) ... [2022-11-25 23:31:16,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:16" (1/1) ... [2022-11-25 23:31:16,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:16" (1/1) ... [2022-11-25 23:31:16,446 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:16" (1/1) ... [2022-11-25 23:31:16,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:16" (1/1) ... [2022-11-25 23:31:16,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:31:16,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:31:16,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:31:16,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:31:16,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:16" (1/1) ... [2022-11-25 23:31:16,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:31:16,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:16,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:31:16,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:31:16,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:31:16,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:31:16,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:31:16,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:31:16,622 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:31:16,625 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:31:16,754 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:31:16,796 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:31:16,796 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 23:31:16,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:31:16 BoogieIcfgContainer [2022-11-25 23:31:16,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:31:16,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:31:16,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:31:16,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:31:16,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:31:16" (1/3) ... [2022-11-25 23:31:16,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acec9ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:31:16, skipping insertion in model container [2022-11-25 23:31:16,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:16" (2/3) ... [2022-11-25 23:31:16,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acec9ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:31:16, skipping insertion in model container [2022-11-25 23:31:16,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:31:16" (3/3) ... [2022-11-25 23:31:16,810 INFO L112 eAbstractionObserver]: Analyzing ICFG Mono3_1.c [2022-11-25 23:31:16,844 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:31:16,844 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:31:16,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:31:16,974 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7cd513db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:31:16,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:31:16,986 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:31:16,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 23:31:16,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:16,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 23:31:17,001 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:17,007 INFO L85 PathProgramCache]: Analyzing trace with hash 2067913, now seen corresponding path program 1 times [2022-11-25 23:31:17,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:17,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787972367] [2022-11-25 23:31:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:17,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:17,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:17,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787972367] [2022-11-25 23:31:17,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787972367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:17,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:31:17,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:31:17,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314466415] [2022-11-25 23:31:17,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:17,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:31:17,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:17,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:31:17,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:31:17,297 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:31:17,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:17,359 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-11-25 23:31:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:31:17,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-25 23:31:17,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:17,375 INFO L225 Difference]: With dead ends: 13 [2022-11-25 23:31:17,375 INFO L226 Difference]: Without dead ends: 6 [2022-11-25 23:31:17,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:31:17,385 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:17,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:31:17,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2022-11-25 23:31:17,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2022-11-25 23:31:17,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:31:17,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2022-11-25 23:31:17,423 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2022-11-25 23:31:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:17,423 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2022-11-25 23:31:17,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:31:17,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2022-11-25 23:31:17,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:31:17,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:17,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:31:17,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:31:17,425 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:17,427 INFO L85 PathProgramCache]: Analyzing trace with hash 64062984, now seen corresponding path program 1 times [2022-11-25 23:31:17,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:17,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044370659] [2022-11-25 23:31:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:17,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:17,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:17,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044370659] [2022-11-25 23:31:17,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044370659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:31:17,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427457584] [2022-11-25 23:31:17,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:17,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:17,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:17,567 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:17,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:31:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:17,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:31:17,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:17,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:31:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:17,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427457584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:31:17,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [120741891] [2022-11-25 23:31:18,011 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-25 23:31:18,012 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:31:18,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:31:18,023 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:31:18,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:18,249 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:31:18,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69#(and (not (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 1000000)) (= (ite (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:31:18,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:31:18,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:31:18,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 8 [2022-11-25 23:31:18,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159860886] [2022-11-25 23:31:18,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:31:18,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:31:18,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:18,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:31:18,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:31:18,488 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:31:18,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:18,625 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2022-11-25 23:31:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:31:18,626 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 23:31:18,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:18,626 INFO L225 Difference]: With dead ends: 14 [2022-11-25 23:31:18,626 INFO L226 Difference]: Without dead ends: 9 [2022-11-25 23:31:18,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:31:18,629 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:18,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:31:18,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-25 23:31:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-25 23:31:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:31:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-25 23:31:18,635 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-25 23:31:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:18,635 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-25 23:31:18,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:31:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-25 23:31:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:31:18,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:18,636 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2022-11-25 23:31:18,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:18,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:18,843 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:18,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1492854153, now seen corresponding path program 2 times [2022-11-25 23:31:18,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:18,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073765139] [2022-11-25 23:31:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:18,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:19,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:19,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073765139] [2022-11-25 23:31:19,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073765139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:31:19,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604103712] [2022-11-25 23:31:19,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:31:19,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:19,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:19,189 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:19,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:31:19,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:31:19,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:31:19,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:31:19,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:19,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:31:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:19,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604103712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:31:19,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1985782980] [2022-11-25 23:31:19,446 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-25 23:31:19,446 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:31:19,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:31:19,447 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:31:19,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:19,523 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:31:19,734 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '166#(and (not (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 1000000)) (= (ite (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:31:19,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:31:19,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:31:19,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 23:31:19,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733504669] [2022-11-25 23:31:19,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:31:19,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:31:19,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:19,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:31:19,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:31:19,737 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:31:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:20,123 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2022-11-25 23:31:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:31:20,125 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:31:20,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:20,125 INFO L225 Difference]: With dead ends: 18 [2022-11-25 23:31:20,125 INFO L226 Difference]: Without dead ends: 15 [2022-11-25 23:31:20,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:31:20,126 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:20,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:31:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-25 23:31:20,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-25 23:31:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:31:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-25 23:31:20,132 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2022-11-25 23:31:20,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:20,132 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-25 23:31:20,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:31:20,132 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-25 23:31:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:31:20,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:20,133 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2022-11-25 23:31:20,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:20,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:20,341 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:20,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1997667031, now seen corresponding path program 3 times [2022-11-25 23:31:20,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:20,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596073393] [2022-11-25 23:31:20,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:20,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:20,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:20,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596073393] [2022-11-25 23:31:20,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596073393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:31:20,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097842613] [2022-11-25 23:31:20,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:31:20,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:20,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:20,749 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:20,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:31:20,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:31:20,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:31:20,860 WARN L261 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 23:31:20,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:21,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:31:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:22,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097842613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:31:22,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1907082534] [2022-11-25 23:31:22,834 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-25 23:31:22,834 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:31:22,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:31:22,835 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:31:22,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:22,939 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:31:23,184 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '346#(and (not (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 1000000)) (= (ite (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:31:23,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:31:23,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:31:23,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 35 [2022-11-25 23:31:23,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628497669] [2022-11-25 23:31:23,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:31:23,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 23:31:23,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:23,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 23:31:23,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1111, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 23:31:23,188 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:31:31,313 WARN L233 SmtUtils]: Spent 7.17s on a formula simplification that was a NOOP. DAG size: 114 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:31:37,123 WARN L233 SmtUtils]: Spent 5.32s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:31:49,378 WARN L233 SmtUtils]: Spent 11.61s on a formula simplification that was a NOOP. DAG size: 117 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:32:14,693 WARN L233 SmtUtils]: Spent 7.05s on a formula simplification that was a NOOP. DAG size: 110 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:32:14,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:14,732 INFO L93 Difference]: Finished difference Result 31 states and 42 transitions. [2022-11-25 23:32:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 23:32:14,734 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-25 23:32:14,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:14,735 INFO L225 Difference]: With dead ends: 31 [2022-11-25 23:32:14,735 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 23:32:14,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 47.9s TimeCoverageRelationStatistics Valid=782, Invalid=1767, Unknown=1, NotChecked=0, Total=2550 [2022-11-25 23:32:14,739 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 86 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:14,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 17 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-25 23:32:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 23:32:14,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-25 23:32:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:32:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-11-25 23:32:14,754 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2022-11-25 23:32:14,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:14,755 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-11-25 23:32:14,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:32:14,755 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-11-25 23:32:14,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-25 23:32:14,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:14,757 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2022-11-25 23:32:14,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:14,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:14,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:14,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:14,963 INFO L85 PathProgramCache]: Analyzing trace with hash 576920681, now seen corresponding path program 4 times [2022-11-25 23:32:14,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:14,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412243613] [2022-11-25 23:32:14,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:14,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:32:15,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:15,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412243613] [2022-11-25 23:32:15,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412243613] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:32:15,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503392056] [2022-11-25 23:32:15,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:32:15,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:15,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:15,818 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:15,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:32:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:15,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 23:32:15,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:32:16,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:32:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:32:17,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503392056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:32:17,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1519456162] [2022-11-25 23:32:17,458 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-25 23:32:17,458 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:32:17,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:32:17,459 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:32:17,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:32:17,552 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:32:17,807 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '676#(and (not (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 1000000)) (= (ite (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:32:17,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:32:17,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:32:17,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-25 23:32:17,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449000371] [2022-11-25 23:32:17,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:32:17,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-25 23:32:17,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:17,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-25 23:32:17,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=1973, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 23:32:17,814 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:34:43,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:43,533 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2022-11-25 23:34:43,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 23:34:43,534 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-25 23:34:43,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:43,537 INFO L225 Difference]: With dead ends: 54 [2022-11-25 23:34:43,538 INFO L226 Difference]: Without dead ends: 51 [2022-11-25 23:34:43,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 147.1s TimeCoverageRelationStatistics Valid=1752, Invalid=3645, Unknown=5, NotChecked=0, Total=5402 [2022-11-25 23:34:43,541 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:43,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:34:43,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-25 23:34:43,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-25 23:34:43,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:34:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-11-25 23:34:43,560 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2022-11-25 23:34:43,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:43,560 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-11-25 23:34:43,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:34:43,561 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-11-25 23:34:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 23:34:43,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:43,562 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2022-11-25 23:34:43,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:34:43,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:43,769 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:34:43,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:43,769 INFO L85 PathProgramCache]: Analyzing trace with hash -937252119, now seen corresponding path program 5 times [2022-11-25 23:34:43,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:43,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373329397] [2022-11-25 23:34:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:43,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:34:46,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:46,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373329397] [2022-11-25 23:34:46,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373329397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:34:46,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505043436] [2022-11-25 23:34:46,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:34:46,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:46,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:46,502 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:34:46,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec261143-e9f0-4b95-8a16-05cebe173d84/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:35:19,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-25 23:35:19,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:35:19,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-25 23:35:19,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:19,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:35:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:35,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505043436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:35:35,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355438403] [2022-11-25 23:35:35,593 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-25 23:35:35,593 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:35:35,593 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:35:35,593 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:35:35,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:35:35,694 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:35:36,835 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1313#(and (not (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 1000000)) (= (ite (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:35:36,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:35:36,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:35:36,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-25 23:35:36,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665437452] [2022-11-25 23:35:36,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:35:36,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-25 23:35:36,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:36,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-25 23:35:36,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2595, Invalid=7305, Unknown=0, NotChecked=0, Total=9900 [2022-11-25 23:35:36,841 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:38:47,136 WARN L233 SmtUtils]: Spent 2.51m on a formula simplification. DAG size of input: 282 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:42:10,976 WARN L233 SmtUtils]: Spent 2.75m on a formula simplification. DAG size of input: 276 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:42:12,999 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 21) 4294967296) 1000000)) (.cse0 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 29) 4294967296) 1000000)) (.cse8 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 6) 4294967296) 1000000)) (.cse4 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 35) 4294967296) 1000000)) (.cse11 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 30) 4294967296) 1000000)) (.cse5 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 36) 4294967296) 1000000)) (.cse10 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 20) 4294967296) 1000000)) (.cse16 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 15) 4294967296) 1000000)) (.cse23 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 14) 4294967296) 1000000)) (.cse20 (< (mod (+ 19 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 1000000)) (.cse25 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 9) 4294967296) 1000000)) (.cse7 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 22) 4294967296) 1000000)) (.cse21 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 1) 4294967296) 1000000)) (.cse31 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 12) 4294967296) 1000000)) (.cse24 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 13) 4294967296) 1000000)) (.cse22 (< (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296) 1000000)) (.cse32 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 39) 4294967296) 1000000)) (.cse29 (< (mod (+ 23 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 1000000)) (.cse19 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 43) 4294967296) 1000000)) (.cse2 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 26) 4294967296) 1000000)) (.cse27 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 18) 4294967296) 1000000)) (.cse3 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 27) 4294967296) 1000000)) (.cse1 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 28) 4294967296) 1000000)) (.cse18 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 42) 4294967296) 1000000)) (.cse33 (< (mod (+ 40 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 1000000)) (.cse39 (< (mod (+ 41 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 1000000)) (.cse13 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 34) 4294967296) 1000000)) (.cse12 (< (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 1000000)) (.cse28 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296) 1000000)) (.cse38 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 17) 4294967296) 1000000)) (.cse17 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 16) 4294967296) 1000000)) (.cse37 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 25) 4294967296) 1000000)) (.cse36 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 24) 4294967296) 1000000)) (.cse9 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 5) 4294967296) 1000000)) (.cse15 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 37) 4294967296) 1000000)) (.cse35 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 38) 4294967296) 1000000)) (.cse34 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 2) 4294967296) 1000000)) (.cse41 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296) 1000000)) (.cse42 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 3) 4294967296) 1000000)) (.cse14 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 31) 4294967296) 1000000)) (.cse30 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 11) 4294967296) 1000000)) (.cse26 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296) 1000000)) (.cse43 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 32) 4294967296) 1000000)) (.cse40 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 33) 4294967296) 1000000))) (and (or .cse0 (not .cse1)) (or (not .cse2) .cse3) (or (not .cse4) .cse5) (or (not .cse6) .cse7) (or .cse8 (not .cse9)) (or (not .cse10) .cse6) (or .cse11 (not .cse0)) (or (not .cse8) .cse12) (or .cse4 (not .cse13)) (or .cse14 (not .cse11)) (or .cse15 (not .cse5)) (or (not .cse16) .cse17) (or (not .cse18) .cse19) (or (not .cse20) .cse10) (or .cse21 (not .cse22)) (or .cse16 (not .cse23)) (or (not .cse24) .cse23) (or (not .cse25) .cse26) (or (not .cse27) .cse20) (or (not .cse28) .cse25) (or .cse29 (not .cse7)) (or (not .cse30) .cse31) (or (not .cse32) .cse33) (or .cse34 (not .cse21)) (or (not .cse31) .cse24) .cse22 (or (not .cse35) .cse32) (or (not .cse29) .cse36) (or (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 44) 4294967296) 1000000) (not .cse19)) (or .cse2 (not .cse37)) (or .cse27 (not .cse38)) (or (not .cse3) .cse1) (or .cse18 (not .cse39)) (or (not .cse33) .cse39) (or (not .cse40) .cse13) (or (not .cse12) .cse28) (or .cse38 (not .cse17)) (or .cse37 (not .cse36)) (or (not .cse41) .cse9) (or (not .cse15) .cse35) (or .cse42 (not .cse34)) (or .cse41 (not .cse42)) (or .cse43 (not .cse14)) (or .cse30 (not .cse26)) (or (not .cse43) .cse40))) is different from false [2022-11-25 23:42:15,016 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 21) 4294967296) 1000000)) (.cse0 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 29) 4294967296) 1000000)) (.cse8 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 6) 4294967296) 1000000)) (.cse4 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 35) 4294967296) 1000000)) (.cse11 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 30) 4294967296) 1000000)) (.cse5 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 36) 4294967296) 1000000)) (.cse10 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 20) 4294967296) 1000000)) (.cse16 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 15) 4294967296) 1000000)) (.cse22 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 14) 4294967296) 1000000)) (.cse19 (< (mod (+ 19 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 1000000)) (.cse24 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 9) 4294967296) 1000000)) (.cse7 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 22) 4294967296) 1000000)) (.cse20 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 1) 4294967296) 1000000)) (.cse30 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 12) 4294967296) 1000000)) (.cse23 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 13) 4294967296) 1000000)) (.cse21 (< (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296) 1000000)) (.cse31 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 39) 4294967296) 1000000)) (.cse28 (< (mod (+ 23 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 1000000)) (.cse2 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 26) 4294967296) 1000000)) (.cse26 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 18) 4294967296) 1000000)) (.cse3 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 27) 4294967296) 1000000)) (.cse1 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 28) 4294967296) 1000000)) (.cse18 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 42) 4294967296) 1000000)) (.cse32 (< (mod (+ 40 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 1000000)) (.cse38 (< (mod (+ 41 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 1000000)) (.cse13 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 34) 4294967296) 1000000)) (.cse12 (< (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 1000000)) (.cse27 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296) 1000000)) (.cse37 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 17) 4294967296) 1000000)) (.cse17 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 16) 4294967296) 1000000)) (.cse36 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 25) 4294967296) 1000000)) (.cse35 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 24) 4294967296) 1000000)) (.cse9 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 5) 4294967296) 1000000)) (.cse15 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 37) 4294967296) 1000000)) (.cse34 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 38) 4294967296) 1000000)) (.cse33 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 2) 4294967296) 1000000)) (.cse40 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296) 1000000)) (.cse41 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 3) 4294967296) 1000000)) (.cse14 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 31) 4294967296) 1000000)) (.cse29 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 11) 4294967296) 1000000)) (.cse25 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296) 1000000)) (.cse42 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 32) 4294967296) 1000000)) (.cse39 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 33) 4294967296) 1000000))) (and (or .cse0 (not .cse1)) (or (not .cse2) .cse3) (or (not .cse4) .cse5) (or (not .cse6) .cse7) (or .cse8 (not .cse9)) (or (not .cse10) .cse6) (or .cse11 (not .cse0)) (or (not .cse8) .cse12) (or .cse4 (not .cse13)) (or .cse14 (not .cse11)) (or .cse15 (not .cse5)) (or (not .cse16) .cse17) (or (not .cse18) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 43) 4294967296) 1000000)) (or (not .cse19) .cse10) (or .cse20 (not .cse21)) (or .cse16 (not .cse22)) (or (not .cse23) .cse22) (or (not .cse24) .cse25) (or (not .cse26) .cse19) (or (not .cse27) .cse24) (or .cse28 (not .cse7)) (or (not .cse29) .cse30) (or (not .cse31) .cse32) (or .cse33 (not .cse20)) (or (not .cse30) .cse23) .cse21 (or (not .cse34) .cse31) (or (not .cse28) .cse35) (or .cse2 (not .cse36)) (or .cse26 (not .cse37)) (or (not .cse3) .cse1) (or .cse18 (not .cse38)) (or (not .cse32) .cse38) (or (not .cse39) .cse13) (or (not .cse12) .cse27) (or .cse37 (not .cse17)) (or .cse36 (not .cse35)) (or (not .cse40) .cse9) (or (not .cse15) .cse34) (or .cse41 (not .cse33)) (or .cse40 (not .cse41)) (or .cse42 (not .cse14)) (or .cse29 (not .cse25)) (or (not .cse42) .cse39))) is different from false [2022-11-25 23:45:27,481 WARN L233 SmtUtils]: Spent 2.51m on a formula simplification. DAG size of input: 258 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)