./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dcebefc76bde79b9a5fa67feebc75881761b0a4209b78516b385f787f62f9340 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:15:17,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:15:17,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:15:17,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:15:17,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:15:17,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:15:17,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:15:17,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:15:17,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:15:17,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:15:17,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:15:17,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:15:17,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:15:17,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:15:17,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:15:17,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:15:17,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:15:17,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:15:17,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:15:17,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:15:17,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:15:17,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:15:17,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:15:17,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:15:17,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:15:17,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:15:17,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:15:17,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:15:17,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:15:17,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:15:17,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:15:17,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:15:17,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:15:17,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:15:17,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:15:17,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:15:17,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:15:17,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:15:17,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:15:17,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:15:17,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:15:17,655 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:15:17,670 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:15:17,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:15:17,670 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:15:17,670 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:15:17,671 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:15:17,671 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:15:17,671 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:15:17,671 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:15:17,671 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:15:17,671 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:15:17,672 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:15:17,672 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:15:17,672 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:15:17,672 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:15:17,672 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:15:17,673 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:15:17,673 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:15:17,673 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:15:17,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:15:17,674 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:15:17,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:15:17,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:15:17,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:15:17,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:15:17,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:15:17,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:15:17,675 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:15:17,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:15:17,675 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:15:17,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:15:17,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:15:17,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:15:17,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:15:17,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:15:17,676 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:15:17,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:15:17,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:15:17,676 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:15:17,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:15:17,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:15:17,677 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:15:17,677 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_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dcebefc76bde79b9a5fa67feebc75881761b0a4209b78516b385f787f62f9340 [2022-12-14 10:15:17,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:15:17,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:15:17,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:15:17,865 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:15:17,866 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:15:17,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c [2022-12-14 10:15:20,510 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:15:20,666 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:15:20,667 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c [2022-12-14 10:15:20,673 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/data/e2235da1e/531976aafd99414aaed32248195144ee/FLAG7874afd72 [2022-12-14 10:15:20,687 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/data/e2235da1e/531976aafd99414aaed32248195144ee [2022-12-14 10:15:20,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:15:20,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:15:20,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:15:20,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:15:20,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:15:20,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:15:20" (1/1) ... [2022-12-14 10:15:20,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@89c0998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:15:20, skipping insertion in model container [2022-12-14 10:15:20,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:15:20" (1/1) ... [2022-12-14 10:15:20,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:15:20,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:15:20,844 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_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c[458,471] [2022-12-14 10:15:20,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:15:20,866 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:15:20,877 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_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c[458,471] [2022-12-14 10:15:20,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:15:20,893 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:15:20,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:15:20 WrapperNode [2022-12-14 10:15:20,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:15:20,894 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:15:20,894 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:15:20,894 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:15:20,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:15:20" (1/1) ... [2022-12-14 10:15:20,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:15:20" (1/1) ... [2022-12-14 10:15:20,916 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2022-12-14 10:15:20,916 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:15:20,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:15:20,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:15:20,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:15:20,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:15:20" (1/1) ... [2022-12-14 10:15:20,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:15:20" (1/1) ... [2022-12-14 10:15:20,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:15:20" (1/1) ... [2022-12-14 10:15:20,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:15:20" (1/1) ... [2022-12-14 10:15:20,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:15:20" (1/1) ... [2022-12-14 10:15:20,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:15:20" (1/1) ... [2022-12-14 10:15:20,929 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:15:20" (1/1) ... [2022-12-14 10:15:20,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:15:20" (1/1) ... [2022-12-14 10:15:20,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:15:20,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:15:20,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:15:20,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:15:20,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:15:20" (1/1) ... [2022-12-14 10:15:20,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:15:20,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:15:20,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:15:20,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:15:20,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:15:20,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:15:20,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:15:20,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:15:20,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 10:15:20,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 10:15:21,037 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:15:21,038 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:15:21,140 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:15:21,166 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:15:21,166 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 10:15:21,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:15:21 BoogieIcfgContainer [2022-12-14 10:15:21,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:15:21,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:15:21,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:15:21,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:15:21,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:15:20" (1/3) ... [2022-12-14 10:15:21,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcdc48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:15:21, skipping insertion in model container [2022-12-14 10:15:21,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:15:20" (2/3) ... [2022-12-14 10:15:21,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcdc48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:15:21, skipping insertion in model container [2022-12-14 10:15:21,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:15:21" (3/3) ... [2022-12-14 10:15:21,178 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound50.c [2022-12-14 10:15:21,197 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:15:21,198 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:15:21,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:15:21,255 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;@7b743ff8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:15:21,256 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:15:21,260 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:15:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 10:15:21,266 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:15:21,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 10:15:21,268 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:15:21,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:15:21,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1757604175, now seen corresponding path program 1 times [2022-12-14 10:15:21,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:15:21,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251040284] [2022-12-14 10:15:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:15:21,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:15:21,376 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:15:21,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947533661] [2022-12-14 10:15:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:15:21,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:15:21,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:15:21,379 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:15:21,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:15:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:15:21,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:15:21,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:15:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:15:21,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:15:21,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:15:21,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251040284] [2022-12-14 10:15:21,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:15:21,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947533661] [2022-12-14 10:15:21,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947533661] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:15:21,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:15:21,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:15:21,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022686180] [2022-12-14 10:15:21,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:15:21,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:15:21,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:15:21,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:15:21,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:15:21,563 INFO L87 Difference]: Start difference. First operand has 14 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:15:21,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:15:21,658 INFO L93 Difference]: Finished difference Result 38 states and 56 transitions. [2022-12-14 10:15:21,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:15:21,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 10:15:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:15:21,667 INFO L225 Difference]: With dead ends: 38 [2022-12-14 10:15:21,667 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 10:15:21,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:15:21,674 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:15:21,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 35 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:15:21,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 10:15:21,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 10:15:21,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:15:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-12-14 10:15:21,702 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 6 [2022-12-14 10:15:21,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:15:21,702 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-12-14 10:15:21,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:15:21,703 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-12-14 10:15:21,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 10:15:21,703 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:15:21,703 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:15:21,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:15:21,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 10:15:21,906 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:15:21,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:15:21,909 INFO L85 PathProgramCache]: Analyzing trace with hash -19935186, now seen corresponding path program 1 times [2022-12-14 10:15:21,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:15:21,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662525342] [2022-12-14 10:15:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:15:21,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:15:21,948 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:15:21,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354846503] [2022-12-14 10:15:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:15:21,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:15:21,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:15:21,954 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:15:21,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:15:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:15:22,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 10:15:22,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:15:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:15:22,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:15:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:15:22,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:15:22,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662525342] [2022-12-14 10:15:22,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:15:22,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354846503] [2022-12-14 10:15:22,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354846503] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:15:22,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1239975362] [2022-12-14 10:15:22,506 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:15:22,506 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:15:22,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:15:22,515 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:15:22,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:15:23,208 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2022-12-14 10:15:23,235 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:15:23,467 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '205#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:15:23,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:15:23,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:15:23,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2022-12-14 10:15:23,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627126827] [2022-12-14 10:15:23,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 10:15:23,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 10:15:23,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:15:23,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 10:15:23,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-12-14 10:15:23,470 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:15:23,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:15:23,579 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-12-14 10:15:23,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:15:23,580 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2022-12-14 10:15:23,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:15:23,580 INFO L225 Difference]: With dead ends: 30 [2022-12-14 10:15:23,581 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 10:15:23,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-12-14 10:15:23,582 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:15:23,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:15:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 10:15:23,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2022-12-14 10:15:23,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:15:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-12-14 10:15:23,589 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2022-12-14 10:15:23,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:15:23,589 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-12-14 10:15:23,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:15:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-12-14 10:15:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 10:15:23,590 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:15:23,590 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 10:15:23,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:15:23,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 10:15:23,792 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:15:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:15:23,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1489129899, now seen corresponding path program 1 times [2022-12-14 10:15:23,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:15:23,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773710299] [2022-12-14 10:15:23,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:15:23,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:15:23,832 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:15:23,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25500836] [2022-12-14 10:15:23,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:15:23,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:15:23,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:15:23,838 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:15:23,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:15:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:15:23,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:15:23,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:15:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:15:24,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:15:58,221 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_12| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_12|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17|))))) is different from true [2022-12-14 10:16:16,271 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_12| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_12|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17|))))) is different from true [2022-12-14 10:16:22,312 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:16:24,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:16:24,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773710299] [2022-12-14 10:16:24,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:16:24,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25500836] [2022-12-14 10:16:24,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25500836] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:16:24,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [469544691] [2022-12-14 10:16:24,340 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 10:16:24,340 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:16:24,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:16:24,341 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:16:24,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:16:24,742 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-12-14 10:16:24,798 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:16:25,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '395#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:16:25,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:16:25,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:16:25,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-12-14 10:16:25,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370284399] [2022-12-14 10:16:25,304 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:16:25,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 10:16:25,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:16:25,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 10:16:25,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=313, Unknown=8, NotChecked=114, Total=506 [2022-12-14 10:16:25,305 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:16:25,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:16:25,394 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-12-14 10:16:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:16:25,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-12-14 10:16:25,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:16:25,395 INFO L225 Difference]: With dead ends: 28 [2022-12-14 10:16:25,395 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 10:16:25,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=93, Invalid=417, Unknown=8, NotChecked=132, Total=650 [2022-12-14 10:16:25,397 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:16:25,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 31 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:16:25,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 10:16:25,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 10:16:25,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:16:25,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-12-14 10:16:25,402 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2022-12-14 10:16:25,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:16:25,402 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-12-14 10:16:25,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:16:25,403 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-12-14 10:16:25,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 10:16:25,403 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:16:25,403 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2022-12-14 10:16:25,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 10:16:25,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:16:25,604 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:16:25,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:16:25,606 INFO L85 PathProgramCache]: Analyzing trace with hash -563106994, now seen corresponding path program 2 times [2022-12-14 10:16:25,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:16:25,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137468237] [2022-12-14 10:16:25,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:16:25,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:16:25,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:16:25,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42435087] [2022-12-14 10:16:25,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:16:25,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:16:25,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:16:25,633 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:16:25,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:16:25,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:16:25,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:16:25,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 10:16:25,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:16:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:16:25,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:16:29,959 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:16:29,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:16:29,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137468237] [2022-12-14 10:16:29,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:16:29,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42435087] [2022-12-14 10:16:29,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42435087] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:16:29,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [771916430] [2022-12-14 10:16:29,963 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 10:16:29,964 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:16:29,964 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:16:29,964 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:16:29,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:16:30,361 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-12-14 10:16:30,365 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:16:30,657 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '610#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:16:30,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:16:30,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:16:30,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-12-14 10:16:30,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164165409] [2022-12-14 10:16:30,658 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:16:30,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 10:16:30,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:16:30,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 10:16:30,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=355, Unknown=1, NotChecked=38, Total=462 [2022-12-14 10:16:30,660 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:16:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:16:30,768 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-12-14 10:16:30,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 10:16:30,768 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2022-12-14 10:16:30,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:16:30,769 INFO L225 Difference]: With dead ends: 31 [2022-12-14 10:16:30,769 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 10:16:30,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=89, Invalid=466, Unknown=1, NotChecked=44, Total=600 [2022-12-14 10:16:30,771 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:16:30,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 48 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:16:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 10:16:30,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-14 10:16:30,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 10:16:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-12-14 10:16:30,779 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 26 [2022-12-14 10:16:30,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:16:30,780 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-12-14 10:16:30,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:16:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-12-14 10:16:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 10:16:30,781 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:16:30,781 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1] [2022-12-14 10:16:30,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:16:30,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:16:30,983 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:16:30,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:16:30,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2031862859, now seen corresponding path program 3 times [2022-12-14 10:16:30,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:16:30,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311891822] [2022-12-14 10:16:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:16:30,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:16:31,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:16:31,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925555179] [2022-12-14 10:16:31,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:16:31,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:16:31,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:16:31,015 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:16:31,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:16:31,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:16:31,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:16:31,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 10:16:31,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:16:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:16:31,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:16:35,344 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 2) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 2 |c_ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 4) 4)) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:16:51,397 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42|) (* 2 |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42|)) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| 4) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50|) 4)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| 3)) 4) 0)))) is different from true [2022-12-14 10:17:09,473 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42|) (* 2 |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42|)) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| 4) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50|) 4)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-12-14 10:17:15,506 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 3) |ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 6) 9) (+ (* 3 |ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|))) (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 2)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:17:17,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:17:17,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311891822] [2022-12-14 10:17:17,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:17:17,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925555179] [2022-12-14 10:17:17,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925555179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:17:17,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [781281034] [2022-12-14 10:17:17,529 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 10:17:17,529 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:17:17,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:17:17,529 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:17:17,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:17:17,798 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-12-14 10:17:17,848 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:17:18,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '903#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:17:18,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:17:18,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:17:18,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-12-14 10:17:18,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952314798] [2022-12-14 10:17:18,272 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:17:18,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 10:17:18,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:17:18,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 10:17:18,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=435, Unknown=4, NotChecked=180, Total=702 [2022-12-14 10:17:18,273 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 10:17:18,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:17:18,395 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-12-14 10:17:18,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:17:18,395 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2022-12-14 10:17:18,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:17:18,396 INFO L225 Difference]: With dead ends: 34 [2022-12-14 10:17:18,396 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 10:17:18,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=104, Invalid=558, Unknown=4, NotChecked=204, Total=870 [2022-12-14 10:17:18,398 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:17:18,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:17:18,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 10:17:18,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-14 10:17:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 10:17:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-12-14 10:17:18,403 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 33 [2022-12-14 10:17:18,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:17:18,403 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-12-14 10:17:18,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 10:17:18,404 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-12-14 10:17:18,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 10:17:18,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:17:18,404 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2022-12-14 10:17:18,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:17:18,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:17:18,606 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:17:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:17:18,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1968307026, now seen corresponding path program 4 times [2022-12-14 10:17:18,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:17:18,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950230851] [2022-12-14 10:17:18,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:17:18,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:17:18,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:17:18,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455563972] [2022-12-14 10:17:18,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:17:18,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:17:18,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:17:18,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:17:18,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:17:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:17:18,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 10:17:18,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:17:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 10:17:18,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:17:56,768 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_58| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_58|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| 3)) 4) 0)))) is different from true [2022-12-14 10:18:14,812 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_58| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_58|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-12-14 10:18:20,840 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) |c_ULTIMATE.start_main_~k~0#1|)) (not (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:18:28,897 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 2) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 2 |c_ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 4) 4)) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:18:52,925 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 4) |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 3)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 16 (* |c_ULTIMATE.start_main_~y~0#1| 8)) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:18:54,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:18:54,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950230851] [2022-12-14 10:18:54,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:18:54,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455563972] [2022-12-14 10:18:54,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455563972] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:18:54,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1787228044] [2022-12-14 10:18:54,945 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 10:18:54,945 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:18:54,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:18:54,946 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:18:54,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:18:55,234 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-12-14 10:18:55,277 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:18:56,535 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1250#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:18:56,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:18:56,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:18:56,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-12-14 10:18:56,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005695490] [2022-12-14 10:18:56,536 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:18:56,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 10:18:56,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:18:56,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 10:18:56,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=469, Unknown=13, NotChecked=240, Total=812 [2022-12-14 10:18:56,537 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 10:18:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:18:56,690 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-12-14 10:18:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:18:56,690 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 40 [2022-12-14 10:18:56,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:18:56,691 INFO L225 Difference]: With dead ends: 37 [2022-12-14 10:18:56,691 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 10:18:56,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=112, Invalid=597, Unknown=13, NotChecked=270, Total=992 [2022-12-14 10:18:56,692 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:18:56,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 82 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:18:56,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 10:18:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-12-14 10:18:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 10:18:56,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-12-14 10:18:56,697 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 40 [2022-12-14 10:18:56,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:18:56,698 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-12-14 10:18:56,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 10:18:56,698 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-12-14 10:18:56,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 10:18:56,698 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:18:56,698 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1] [2022-12-14 10:18:56,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 10:18:56,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:18:56,900 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:18:56,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:18:56,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1747459819, now seen corresponding path program 5 times [2022-12-14 10:18:56,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:18:56,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430463579] [2022-12-14 10:18:56,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:18:56,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:18:56,924 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:18:56,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776243271] [2022-12-14 10:18:56,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:18:56,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:18:56,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:18:56,928 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:18:56,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:18:56,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 10:18:56,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:18:56,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 10:18:56,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:18:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 10:18:57,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:18:57,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:18:57,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430463579] [2022-12-14 10:18:57,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:18:57,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776243271] [2022-12-14 10:18:57,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776243271] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:18:57,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [850939769] [2022-12-14 10:18:57,188 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 10:18:57,188 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:18:57,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:18:57,188 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:18:57,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:18:57,579 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-12-14 10:18:57,582 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:18:57,880 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1560#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:18:57,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:18:57,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:18:57,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-12-14 10:18:57,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654842362] [2022-12-14 10:18:57,880 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:18:57,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 10:18:57,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:18:57,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 10:18:57,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:18:57,881 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 10:18:58,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:18:58,023 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-12-14 10:18:58,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 10:18:58,024 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 47 [2022-12-14 10:18:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:18:58,024 INFO L225 Difference]: With dead ends: 40 [2022-12-14 10:18:58,024 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 10:18:58,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-12-14 10:18:58,025 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:18:58,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 95 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:18:58,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 10:18:58,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-12-14 10:18:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 10:18:58,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-12-14 10:18:58,031 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 47 [2022-12-14 10:18:58,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:18:58,031 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-12-14 10:18:58,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 10:18:58,031 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-12-14 10:18:58,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 10:18:58,032 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:18:58,032 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1] [2022-12-14 10:18:58,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 10:18:58,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 10:18:58,233 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:18:58,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:18:58,234 INFO L85 PathProgramCache]: Analyzing trace with hash -324766194, now seen corresponding path program 6 times [2022-12-14 10:18:58,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:18:58,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176135891] [2022-12-14 10:18:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:18:58,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:18:58,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:18:58,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075232144] [2022-12-14 10:18:58,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:18:58,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:18:58,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:18:58,260 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:18:58,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 10:18:58,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:18:58,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:18:58,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 10:18:58,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:18:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 10:18:58,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:18:58,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:18:58,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176135891] [2022-12-14 10:18:58,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:18:58,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075232144] [2022-12-14 10:18:58,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075232144] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:18:58,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1726051567] [2022-12-14 10:18:58,584 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 10:18:58,584 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:18:58,584 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:18:58,584 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:18:58,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:18:58,871 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-12-14 10:18:58,921 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:18:59,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1902#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:18:59,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:18:59,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:18:59,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-12-14 10:18:59,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769829250] [2022-12-14 10:18:59,464 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:18:59,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 10:18:59,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:18:59,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 10:18:59,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:18:59,465 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 10:18:59,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:18:59,667 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-12-14 10:18:59,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:18:59,667 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 54 [2022-12-14 10:18:59,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:18:59,668 INFO L225 Difference]: With dead ends: 43 [2022-12-14 10:18:59,668 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 10:18:59,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-12-14 10:18:59,670 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:18:59,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 124 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:18:59,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 10:18:59,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-12-14 10:18:59,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 10:18:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-12-14 10:18:59,676 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 54 [2022-12-14 10:18:59,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:18:59,677 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-12-14 10:18:59,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 10:18:59,677 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-12-14 10:18:59,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 10:18:59,677 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:18:59,677 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1] [2022-12-14 10:18:59,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 10:18:59,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:18:59,879 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:18:59,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:18:59,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1588683147, now seen corresponding path program 7 times [2022-12-14 10:18:59,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:18:59,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012304234] [2022-12-14 10:18:59,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:18:59,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:18:59,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:18:59,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851712614] [2022-12-14 10:18:59,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:18:59,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:18:59,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:18:59,906 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:18:59,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 10:18:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:18:59,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 10:18:59,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 36 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 10:19:00,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:38,260 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_100| Int)) (or (= 0 (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| 2)) 4)) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_100|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127|))))) is different from true [2022-12-14 10:19:56,300 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_100| Int)) (or (= 0 (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| 2)) 4)) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_100|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-12-14 10:20:02,325 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:20:04,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:20:04,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012304234] [2022-12-14 10:20:04,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:20:04,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851712614] [2022-12-14 10:20:04,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851712614] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:20:04,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [468753795] [2022-12-14 10:20:04,345 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 10:20:04,345 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:20:04,345 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:20:04,345 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:20:04,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:20:04,641 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-12-14 10:20:04,688 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:20:07,370 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2279#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:20:07,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:20:07,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:20:07,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-12-14 10:20:07,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107448123] [2022-12-14 10:20:07,371 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:20:07,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 10:20:07,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:20:07,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 10:20:07,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=570, Unknown=9, NotChecked=150, Total=812 [2022-12-14 10:20:07,372 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 10:20:07,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:20:07,581 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-12-14 10:20:07,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 10:20:07,582 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 61 [2022-12-14 10:20:07,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:20:07,583 INFO L225 Difference]: With dead ends: 46 [2022-12-14 10:20:07,583 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 10:20:07,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=105, Invalid=710, Unknown=9, NotChecked=168, Total=992 [2022-12-14 10:20:07,584 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:20:07,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 148 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:20:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 10:20:07,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-12-14 10:20:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 10:20:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-12-14 10:20:07,591 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 61 [2022-12-14 10:20:07,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:20:07,591 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-12-14 10:20:07,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 10:20:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-12-14 10:20:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 10:20:07,592 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:20:07,592 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1] [2022-12-14 10:20:07,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 10:20:07,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:20:07,794 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:20:07,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:20:07,795 INFO L85 PathProgramCache]: Analyzing trace with hash 877199214, now seen corresponding path program 8 times [2022-12-14 10:20:07,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:20:07,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234646594] [2022-12-14 10:20:07,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:20:07,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:20:07,816 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:20:07,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075469837] [2022-12-14 10:20:07,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:20:07,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:20:07,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:20:07,818 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:20:07,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 10:20:07,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 10:20:07,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:20:07,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 10:20:07,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:20:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 29 proven. 121 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-14 10:20:08,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:20:46,897 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_124| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_124|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_124| 4)) (+ 16 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| 8) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152|))) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| 3)) 4) 0)))) is different from true [2022-12-14 10:21:04,943 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_124| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_124|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_124| 4)) (+ 16 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| 8) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152|))) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-12-14 10:22:27,381 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 7)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 8) |ULTIMATE.start_main_~k~0#1|) (= (+ (* |ULTIMATE.start_main_~k~0#1| 8) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 64 (* |c_ULTIMATE.start_main_~y~0#1| 16))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:22:29,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:22:29,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234646594] [2022-12-14 10:22:29,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:22:29,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075469837] [2022-12-14 10:22:29,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075469837] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:22:29,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [901924817] [2022-12-14 10:22:29,403 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 10:22:29,403 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:22:29,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:22:29,404 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:22:29,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:22:29,719 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-12-14 10:22:29,723 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:22:30,052 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2842#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:22:30,052 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:22:30,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:22:30,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-12-14 10:22:30,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317918309] [2022-12-14 10:22:30,053 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:22:30,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 10:22:30,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:22:30,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 10:22:30,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=952, Unknown=13, NotChecked=198, Total=1332 [2022-12-14 10:22:30,054 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 10:22:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:22:30,301 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-12-14 10:22:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 10:22:30,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 68 [2022-12-14 10:22:30,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:22:30,302 INFO L225 Difference]: With dead ends: 49 [2022-12-14 10:22:30,302 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 10:22:30,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 81.3s TimeCoverageRelationStatistics Valid=189, Invalid=1142, Unknown=13, NotChecked=216, Total=1560 [2022-12-14 10:22:30,303 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:22:30,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 164 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:22:30,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 10:22:30,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-12-14 10:22:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 10:22:30,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-12-14 10:22:30,314 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 68 [2022-12-14 10:22:30,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:22:30,315 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-12-14 10:22:30,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 10:22:30,315 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-12-14 10:22:30,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 10:22:30,316 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:22:30,316 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1] [2022-12-14 10:22:30,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 10:22:30,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:22:30,517 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:22:30,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:22:30,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1812040747, now seen corresponding path program 9 times [2022-12-14 10:22:30,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:22:30,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422803750] [2022-12-14 10:22:30,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:22:30,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:22:30,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:22:30,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101070307] [2022-12-14 10:22:30,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:22:30,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:22:30,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:22:30,533 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:22:30,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 10:22:30,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:22:30,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:22:30,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 10:22:30,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:22:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 19 proven. 163 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-14 10:22:30,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:22:30,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:22:30,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422803750] [2022-12-14 10:22:30,940 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:22:30,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101070307] [2022-12-14 10:22:30,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101070307] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:22:30,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [405056178] [2022-12-14 10:22:30,941 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 10:22:30,941 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:22:30,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:22:30,941 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:22:30,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:22:31,191 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-12-14 10:22:31,234 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:22:31,782 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3280#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:22:31,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:22:31,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:22:31,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-12-14 10:22:31,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430212532] [2022-12-14 10:22:31,783 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:22:31,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 10:22:31,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:22:31,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 10:22:31,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-12-14 10:22:31,784 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 10:22:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:22:32,064 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-12-14 10:22:32,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 10:22:32,064 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 75 [2022-12-14 10:22:32,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:22:32,065 INFO L225 Difference]: With dead ends: 52 [2022-12-14 10:22:32,065 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 10:22:32,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-12-14 10:22:32,066 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:22:32,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 202 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:22:32,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 10:22:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-12-14 10:22:32,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 10:22:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-12-14 10:22:32,078 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 75 [2022-12-14 10:22:32,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:22:32,078 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-12-14 10:22:32,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 10:22:32,078 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-12-14 10:22:32,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 10:22:32,079 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:22:32,079 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1] [2022-12-14 10:22:32,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 10:22:32,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 10:22:32,281 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:22:32,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:22:32,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1796317390, now seen corresponding path program 10 times [2022-12-14 10:22:32,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:22:32,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096920924] [2022-12-14 10:22:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:22:32,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:22:32,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:22:32,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89404242] [2022-12-14 10:22:32,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:22:32,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:22:32,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:22:32,314 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:22:32,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 10:22:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:22:32,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-14 10:22:32,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:22:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 51 proven. 166 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-14 10:22:32,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:22:36,775 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:22:56,817 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_162| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_162|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| 2)) 4) 0)))) is different from true [2022-12-14 10:23:14,853 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_162| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_162|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| 2)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-12-14 10:23:20,879 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) |c_ULTIMATE.start_main_~k~0#1|)) (not (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:26:09,299 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 8 |c_ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 64 (* |c_ULTIMATE.start_main_~y~0#1| 16))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 8) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 7) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:26:17,349 WARN L837 $PredicateComparison]: unable to prove that (or (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 8) |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 9) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 18) 81) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 9 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:26:25,396 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 20) 100) (+ (* |ULTIMATE.start_main_~k~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 10) |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 9)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:26:27,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:26:27,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096920924] [2022-12-14 10:26:27,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:26:27,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89404242] [2022-12-14 10:26:27,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89404242] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:26:27,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1353624626] [2022-12-14 10:26:27,418 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 10:26:27,418 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:26:27,419 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:26:27,419 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:26:27,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:26:27,662 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-12-14 10:26:27,702 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:26:28,359 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3951#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:26:28,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:26:28,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:26:28,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-12-14 10:26:28,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933243285] [2022-12-14 10:26:28,359 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:26:28,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 10:26:28,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:26:28,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 10:26:28,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=959, Unknown=22, NotChecked=490, Total=1640 [2022-12-14 10:26:28,360 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 10:26:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:28,759 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-12-14 10:26:28,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 10:26:28,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 82 [2022-12-14 10:26:28,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:28,760 INFO L225 Difference]: With dead ends: 55 [2022-12-14 10:26:28,760 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 10:26:28,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 139.0s TimeCoverageRelationStatistics Valid=190, Invalid=1148, Unknown=22, NotChecked=532, Total=1892 [2022-12-14 10:26:28,760 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:28,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 220 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:26:28,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 10:26:28,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-12-14 10:26:28,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 10:26:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-12-14 10:26:28,768 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 82 [2022-12-14 10:26:28,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:28,768 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-12-14 10:26:28,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 10:26:28,768 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-12-14 10:26:28,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 10:26:28,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:28,769 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1] [2022-12-14 10:26:28,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 10:26:28,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 10:26:28,970 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:26:28,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:28,970 INFO L85 PathProgramCache]: Analyzing trace with hash 367173323, now seen corresponding path program 11 times [2022-12-14 10:26:28,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:26:28,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850948616] [2022-12-14 10:26:28,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:28,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:26:28,979 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:26:28,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802382078] [2022-12-14 10:26:28,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:26:28,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:26:28,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:26:28,981 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:26:28,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 10:26:29,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 10:26:29,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:26:29,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 10:26:29,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 44 proven. 211 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-14 10:26:29,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:27:18,043 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_198| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 2)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_198| 4) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_198|)) (+ 16 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 8) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237|)))))) is different from true [2022-12-14 10:27:36,086 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_198| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 2)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_198| 4) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_198|)) (+ 16 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 8) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237|))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-12-14 10:28:16,245 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 12) 36) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 6 |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 6) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 5) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:29:11,289 WARN L837 $PredicateComparison]: unable to prove that (or (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 8) |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 9) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 18) 81) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 9 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:29:19,345 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 20) 100) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 10 |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 10) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 9) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:29:27,401 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 10)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 11) |ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 22) 121) (+ (* |ULTIMATE.start_main_~k~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 10:29:29,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:29:29,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850948616] [2022-12-14 10:29:29,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:29:29,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802382078] [2022-12-14 10:29:29,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802382078] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:29:29,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [632208607] [2022-12-14 10:29:29,425 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 10:29:29,426 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:29:29,426 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:29:29,426 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:29:29,426 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:29:29,670 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-12-14 10:29:29,714 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:29:30,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4676#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:29:30,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:29:30,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:29:30,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-12-14 10:29:30,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500341617] [2022-12-14 10:29:30,365 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:29:30,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 10:29:30,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:29:30,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 10:29:30,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1136, Unknown=16, NotChecked=450, Total=1806 [2022-12-14 10:29:30,366 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 10:29:32,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:29:32,742 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-12-14 10:29:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 10:29:32,742 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 89 [2022-12-14 10:29:32,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:29:32,743 INFO L225 Difference]: With dead ends: 58 [2022-12-14 10:29:32,743 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 10:29:32,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 104.1s TimeCoverageRelationStatistics Valid=225, Invalid=1342, Unknown=17, NotChecked=486, Total=2070 [2022-12-14 10:29:32,744 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:29:32,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 251 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:29:32,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 10:29:32,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-12-14 10:29:32,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 10:29:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2022-12-14 10:29:32,751 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 89 [2022-12-14 10:29:32,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:29:32,752 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2022-12-14 10:29:32,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 10:29:32,752 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2022-12-14 10:29:32,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 10:29:32,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:29:32,753 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1] [2022-12-14 10:29:32,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 10:29:32,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:29:32,955 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:29:32,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:29:32,956 INFO L85 PathProgramCache]: Analyzing trace with hash -738960850, now seen corresponding path program 12 times [2022-12-14 10:29:32,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:29:32,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557917151] [2022-12-14 10:29:32,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:29:32,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:29:32,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:29:32,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635569523] [2022-12-14 10:29:32,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:29:32,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:29:32,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:29:32,993 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:29:32,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 10:29:33,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:29:33,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:29:33,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 10:29:33,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:29:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 25 proven. 271 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-14 10:29:33,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:29:33,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:29:33,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557917151] [2022-12-14 10:29:33,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:29:33,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635569523] [2022-12-14 10:29:33,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635569523] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:29:33,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [695313622] [2022-12-14 10:29:33,655 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 10:29:33,655 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:29:33,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:29:33,656 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:29:33,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:29:33,940 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-12-14 10:29:33,993 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:29:39,918 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5210#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:29:39,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:29:39,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:29:39,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-12-14 10:29:39,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846310600] [2022-12-14 10:29:39,918 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:29:39,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 10:29:39,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:29:39,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 10:29:39,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=836, Unknown=1, NotChecked=0, Total=930 [2022-12-14 10:29:39,920 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 10:29:40,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:29:40,334 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-12-14 10:29:40,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 10:29:40,334 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 96 [2022-12-14 10:29:40,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:29:40,335 INFO L225 Difference]: With dead ends: 61 [2022-12-14 10:29:40,335 INFO L226 Difference]: Without dead ends: 56 [2022-12-14 10:29:40,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=114, Invalid=1007, Unknown=1, NotChecked=0, Total=1122 [2022-12-14 10:29:40,336 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:29:40,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 284 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:29:40,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-14 10:29:40,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-12-14 10:29:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-14 10:29:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-12-14 10:29:40,343 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 96 [2022-12-14 10:29:40,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:29:40,344 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-12-14 10:29:40,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 10:29:40,344 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-12-14 10:29:40,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 10:29:40,344 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:29:40,344 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1] [2022-12-14 10:29:40,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 10:29:40,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:29:40,545 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:29:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:29:40,545 INFO L85 PathProgramCache]: Analyzing trace with hash -123823765, now seen corresponding path program 13 times [2022-12-14 10:29:40,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:29:40,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91523865] [2022-12-14 10:29:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:29:40,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:29:40,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:29:40,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190338483] [2022-12-14 10:29:40,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:29:40,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:29:40,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:29:40,552 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:29:40,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5117d39-82c8-4fa5-a338-25e3f7ac0b0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 10:29:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:29:40,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-14 10:29:40,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:29:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 66 proven. 274 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-12-14 10:29:41,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:30:31,640 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_230| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_230|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| 2)) 4) 0)))) is different from true