./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.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_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/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_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/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_c413e829-47e8-4ee0-8692-9a50ea426798/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 461bd06f1b3f06d79cc4cf710543bc8daecc2e978ce52b7fb468042420cb9979 --- 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 12:55:47,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:55:47,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:55:47,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:55:47,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:55:47,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:55:47,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:55:47,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:55:47,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:55:47,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:55:47,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:55:47,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:55:47,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:55:47,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:55:47,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:55:47,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:55:47,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:55:47,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:55:47,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:55:47,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:55:47,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:55:47,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:55:47,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:55:47,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:55:47,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:55:47,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:55:47,750 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:55:47,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:55:47,752 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:55:47,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:55:47,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:55:47,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:55:47,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:55:47,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:55:47,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:55:47,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:55:47,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:55:47,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:55:47,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:55:47,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:55:47,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:55:47,762 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:55:47,788 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:55:47,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:55:47,788 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:55:47,789 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:55:47,789 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:55:47,789 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:55:47,790 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:55:47,790 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:55:47,790 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:55:47,790 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:55:47,790 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:55:47,791 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:55:47,791 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:55:47,791 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:55:47,791 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:55:47,791 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:55:47,792 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:55:47,792 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:55:47,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:55:47,793 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:55:47,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:55:47,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:55:47,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:55:47,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:55:47,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:55:47,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:55:47,794 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:55:47,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:55:47,794 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:55:47,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:55:47,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:55:47,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:55:47,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:55:47,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:55:47,795 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:55:47,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:55:47,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:55:47,796 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:55:47,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:55:47,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:55:47,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:55:47,797 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_c413e829-47e8-4ee0-8692-9a50ea426798/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 461bd06f1b3f06d79cc4cf710543bc8daecc2e978ce52b7fb468042420cb9979 [2022-12-14 12:55:47,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:55:48,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:55:48,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:55:48,015 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:55:48,019 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:55:48,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c [2022-12-14 12:55:50,605 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:55:50,751 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:55:50,752 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c [2022-12-14 12:55:50,757 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/data/564b2d684/5ffdb37cae024bc1b9425c0ae92423bc/FLAG2c338e256 [2022-12-14 12:55:50,772 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/data/564b2d684/5ffdb37cae024bc1b9425c0ae92423bc [2022-12-14 12:55:50,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:55:50,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:55:50,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:55:50,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:55:50,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:55:50,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:55:50" (1/1) ... [2022-12-14 12:55:50,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e8c9b35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:50, skipping insertion in model container [2022-12-14 12:55:50,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:55:50" (1/1) ... [2022-12-14 12:55:50,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:55:50,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:55:50,933 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_c413e829-47e8-4ee0-8692-9a50ea426798/sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c[334,347] [2022-12-14 12:55:50,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:55:50,965 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:55:50,978 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_c413e829-47e8-4ee0-8692-9a50ea426798/sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c[334,347] [2022-12-14 12:55:50,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:55:50,999 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:55:51,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:51 WrapperNode [2022-12-14 12:55:51,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:55:51,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:55:51,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:55:51,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:55:51,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:51" (1/1) ... [2022-12-14 12:55:51,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:51" (1/1) ... [2022-12-14 12:55:51,034 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2022-12-14 12:55:51,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:55:51,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:55:51,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:55:51,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:55:51,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:51" (1/1) ... [2022-12-14 12:55:51,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:51" (1/1) ... [2022-12-14 12:55:51,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:51" (1/1) ... [2022-12-14 12:55:51,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:51" (1/1) ... [2022-12-14 12:55:51,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:51" (1/1) ... [2022-12-14 12:55:51,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:51" (1/1) ... [2022-12-14 12:55:51,058 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:51" (1/1) ... [2022-12-14 12:55:51,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:51" (1/1) ... [2022-12-14 12:55:51,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:55:51,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:55:51,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:55:51,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:55:51,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:51" (1/1) ... [2022-12-14 12:55:51,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:55:51,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:51,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:55:51,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:55:51,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:55:51,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:55:51,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 12:55:51,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 12:55:51,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:55:51,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:55:51,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 12:55:51,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:55:51,194 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:55:51,196 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:55:51,330 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:55:51,415 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:55:51,416 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 12:55:51,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:55:51 BoogieIcfgContainer [2022-12-14 12:55:51,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:55:51,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:55:51,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:55:51,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:55:51,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:55:50" (1/3) ... [2022-12-14 12:55:51,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c8ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:55:51, skipping insertion in model container [2022-12-14 12:55:51,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:55:51" (2/3) ... [2022-12-14 12:55:51,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c8ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:55:51, skipping insertion in model container [2022-12-14 12:55:51,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:55:51" (3/3) ... [2022-12-14 12:55:51,428 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_base.c [2022-12-14 12:55:51,446 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:55:51,447 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:55:51,494 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:55:51,501 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;@676cd59b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:55:51,501 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:55:51,505 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:55:51,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 12:55:51,510 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:51,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 12:55:51,512 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:51,517 INFO L85 PathProgramCache]: Analyzing trace with hash 113374712, now seen corresponding path program 1 times [2022-12-14 12:55:51,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:51,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885910061] [2022-12-14 12:55:51,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:51,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:51,753 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 12:55:51,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:51,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885910061] [2022-12-14 12:55:51,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885910061] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:55:51,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:55:51,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:55:51,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722752837] [2022-12-14 12:55:51,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:55:51,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:55:51,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:51,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:55:51,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:55:51,785 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:55:51,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:51,817 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2022-12-14 12:55:51,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:55:51,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 12:55:51,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:51,827 INFO L225 Difference]: With dead ends: 15 [2022-12-14 12:55:51,828 INFO L226 Difference]: Without dead ends: 8 [2022-12-14 12:55:51,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:55:51,834 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:51,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:55:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-12-14 12:55:51,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-12-14 12:55:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:55:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-12-14 12:55:51,866 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2022-12-14 12:55:51,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:51,866 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-12-14 12:55:51,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:55:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-12-14 12:55:51,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 12:55:51,867 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:51,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 12:55:51,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:55:51,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:51,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:51,868 INFO L85 PathProgramCache]: Analyzing trace with hash -777494178, now seen corresponding path program 1 times [2022-12-14 12:55:51,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:51,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732517867] [2022-12-14 12:55:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:51,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:51,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:55:51,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738398530] [2022-12-14 12:55:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:51,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:51,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:51,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:51,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:55:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:51,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 12:55:51,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:55:52,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:55:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:55:52,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:52,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732517867] [2022-12-14 12:55:52,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:55:52,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738398530] [2022-12-14 12:55:52,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738398530] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:55:52,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [265703986] [2022-12-14 12:55:52,049 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 12:55:52,050 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:55:52,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:55:52,059 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:55:52,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:55:52,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:52,159 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 12:55:52,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 12:55:52,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:52,212 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 12:55:52,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 12:55:52,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:52,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:52,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-12-14 12:55:52,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:52,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:52,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 50 [2022-12-14 12:55:52,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-12-14 12:55:52,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 12:55:52,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 12:55:52,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 12:55:52,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 12:55:52,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 12:55:52,602 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:55:52,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 12:55:52,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 12:55:52,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 12:55:52,748 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:55:52,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 12:55:52,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 12:55:52,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 12:55:52,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 12:55:52,818 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:55:52,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [265703986] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:55:52,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:55:52,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2022-12-14 12:55:52,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960496307] [2022-12-14 12:55:52,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:55:52,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:55:52,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:52,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:55:52,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:55:52,971 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:55:53,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:53,004 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2022-12-14 12:55:53,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:55:53,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 12:55:53,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:53,005 INFO L225 Difference]: With dead ends: 13 [2022-12-14 12:55:53,005 INFO L226 Difference]: Without dead ends: 11 [2022-12-14 12:55:53,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:55:53,006 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:53,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:55:53,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-14 12:55:53,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2022-12-14 12:55:53,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:55:53,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-12-14 12:55:53,010 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-12-14 12:55:53,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:53,010 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-12-14 12:55:53,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:55:53,011 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-12-14 12:55:53,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 12:55:53,011 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:53,011 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:53,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:55:53,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:53,213 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:53,214 INFO L85 PathProgramCache]: Analyzing trace with hash 434744330, now seen corresponding path program 1 times [2022-12-14 12:55:53,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:53,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238264618] [2022-12-14 12:55:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:53,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:53,240 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:55:53,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914865709] [2022-12-14 12:55:53,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:53,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:53,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:53,245 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:53,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:55:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:53,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 12:55:53,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:55:53,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:55:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:55:53,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:53,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238264618] [2022-12-14 12:55:53,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:55:53,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914865709] [2022-12-14 12:55:53,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914865709] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:55:53,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [176110970] [2022-12-14 12:55:53,420 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:55:53,420 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:55:53,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:55:53,420 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:55:53,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:55:53,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:53,462 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 12:55:53,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 12:55:53,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:53,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 12:55:53,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:53,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:53,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-12-14 12:55:53,551 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:55:53,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:53,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:53,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:55:53,730 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-12-14 12:55:53,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 575 treesize of output 635 [2022-12-14 12:55:53,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:55:53,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 387 treesize of output 377 [2022-12-14 12:55:54,494 INFO L321 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2022-12-14 12:55:54,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 659 treesize of output 631 [2022-12-14 12:55:54,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:54,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 606 treesize of output 595 [2022-12-14 12:55:54,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:54,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:54,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:54,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 581 treesize of output 570 [2022-12-14 12:55:54,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 580 treesize of output 566 [2022-12-14 12:55:54,572 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:55:54,580 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:55:54,611 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:55:54,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:54,675 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 12:55:54,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 567 treesize of output 550 [2022-12-14 12:55:54,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:55:54,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 523 treesize of output 522 [2022-12-14 12:55:56,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 12:55:56,817 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:55:56,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 12:55:56,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 12:55:56,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 12:55:56,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 12:55:56,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 12:55:56,976 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:55:57,260 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '168#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= 0 (+ |ULTIMATE.start_main_~R~0#1| 2147483648)) (<= |ULTIMATE.start_main_~R~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:55:57,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:55:57,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:55:57,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-12-14 12:55:57,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691363382] [2022-12-14 12:55:57,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:55:57,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:55:57,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:57,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:55:57,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:55:57,262 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:55:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:57,288 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-12-14 12:55:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:55:57,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 12:55:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:57,289 INFO L225 Difference]: With dead ends: 20 [2022-12-14 12:55:57,289 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 12:55:57,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:55:57,290 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:57,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:55:57,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 12:55:57,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-12-14 12:55:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:55:57,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-12-14 12:55:57,295 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2022-12-14 12:55:57,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:57,295 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-12-14 12:55:57,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:55:57,295 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-12-14 12:55:57,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 12:55:57,296 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:57,296 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:57,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:55:57,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 12:55:57,497 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:57,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:57,497 INFO L85 PathProgramCache]: Analyzing trace with hash 429424560, now seen corresponding path program 2 times [2022-12-14 12:55:57,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:57,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421947178] [2022-12-14 12:55:57,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:57,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:57,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:55:57,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610070347] [2022-12-14 12:55:57,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:55:57,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:57,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:57,509 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:57,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:55:57,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:55:57,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:55:57,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 12:55:57,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:55:57,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:55:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:55:57,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:57,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421947178] [2022-12-14 12:55:57,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:55:57,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610070347] [2022-12-14 12:55:57,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610070347] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:55:57,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [739776452] [2022-12-14 12:55:57,659 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:55:57,660 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:55:57,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:55:57,660 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:55:57,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:55:57,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:57,689 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 12:55:57,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 12:55:57,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:57,717 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 12:55:57,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 12:55:57,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:57,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:57,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-12-14 12:55:57,751 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:55:57,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 12:55:57,840 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:55:57,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 12:55:57,875 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:55:57,888 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:55:57,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 12:55:57,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 12:55:57,972 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:55:57,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 12:55:57,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 12:55:58,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 12:55:58,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 12:55:58,082 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:55:58,380 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '300#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= 0 (+ |ULTIMATE.start_main_~R~0#1| 2147483648)) (<= |ULTIMATE.start_main_~R~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:55:58,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:55:58,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:55:58,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-12-14 12:55:58,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921188302] [2022-12-14 12:55:58,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:55:58,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 12:55:58,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:58,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 12:55:58,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:55:58,382 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:55:58,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:58,416 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2022-12-14 12:55:58,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:55:58,417 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 12:55:58,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:58,417 INFO L225 Difference]: With dead ends: 26 [2022-12-14 12:55:58,417 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 12:55:58,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:55:58,419 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:58,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:55:58,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 12:55:58,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 12:55:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:55:58,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-12-14 12:55:58,423 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2022-12-14 12:55:58,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:58,423 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-12-14 12:55:58,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:55:58,423 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-12-14 12:55:58,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 12:55:58,423 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:58,424 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:58,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:55:58,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:58,625 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:58,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:58,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1219445104, now seen corresponding path program 3 times [2022-12-14 12:55:58,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:58,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843090493] [2022-12-14 12:55:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:58,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:58,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:55:58,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984499343] [2022-12-14 12:55:58,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:55:58,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:58,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:58,685 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:58,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:55:58,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:55:58,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:55:58,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 12:55:58,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:55:58,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:55:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:55:59,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:59,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843090493] [2022-12-14 12:55:59,087 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:55:59,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984499343] [2022-12-14 12:55:59,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984499343] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:55:59,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [596980785] [2022-12-14 12:55:59,089 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:55:59,089 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:55:59,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:55:59,089 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:55:59,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:55:59,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:59,120 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 12:55:59,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 12:55:59,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:59,152 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 12:55:59,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 12:55:59,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:59,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:59,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-12-14 12:55:59,200 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:55:59,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:59,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:59,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:55:59,388 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-12-14 12:55:59,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 575 treesize of output 635 [2022-12-14 12:55:59,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:55:59,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 387 treesize of output 377 [2022-12-14 12:56:03,405 INFO L321 Elim1Store]: treesize reduction 86, result has 1.1 percent of original size [2022-12-14 12:56:03,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 4685 treesize of output 4572 [2022-12-14 12:56:03,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 4447 treesize of output 4430 [2022-12-14 12:56:03,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 4430 treesize of output 4278 [2022-12-14 12:56:03,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 4289 treesize of output 4272 [2022-12-14 12:56:03,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 4268 treesize of output 4255 [2022-12-14 12:56:03,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 4255 treesize of output 4240 [2022-12-14 12:56:03,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 4240 treesize of output 4221 [2022-12-14 12:56:03,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 4221 treesize of output 4204 [2022-12-14 12:56:03,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 4204 treesize of output 4189 [2022-12-14 12:56:03,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 4189 treesize of output 4176 [2022-12-14 12:56:03,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:03,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 4176 treesize of output 4163 [2022-12-14 12:56:04,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 4163 treesize of output 4150 [2022-12-14 12:56:04,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 4150 treesize of output 4137 [2022-12-14 12:56:04,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 4137 treesize of output 4120 [2022-12-14 12:56:04,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 4120 treesize of output 4105 [2022-12-14 12:56:04,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 4105 treesize of output 4090 [2022-12-14 12:56:04,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 4090 treesize of output 4077 [2022-12-14 12:56:04,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 4077 treesize of output 4058 [2022-12-14 12:56:04,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:04,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 4058 treesize of output 4041 [2022-12-14 12:56:05,464 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:56:05,511 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:56:05,528 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:56:05,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 12:56:05,927 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:56:05,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-12-14 12:56:05,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 12:56:05,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 12:56:05,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 12:56:06,047 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:56:06,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '504#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= 0 (+ |ULTIMATE.start_main_~R~0#1| 2147483648)) (<= |ULTIMATE.start_main_~R~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:56:06,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:56:06,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:56:06,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-12-14 12:56:06,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948485920] [2022-12-14 12:56:06,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:56:06,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 12:56:06,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:56:06,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 12:56:06,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2022-12-14 12:56:06,339 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:56:06,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:56:06,402 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2022-12-14 12:56:06,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 12:56:06,402 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 12:56:06,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:56:06,403 INFO L225 Difference]: With dead ends: 38 [2022-12-14 12:56:06,403 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 12:56:06,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2022-12-14 12:56:06,404 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:56:06,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:56:06,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 12:56:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-12-14 12:56:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:56:06,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-12-14 12:56:06,411 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 18 [2022-12-14 12:56:06,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:56:06,412 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-12-14 12:56:06,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:56:06,412 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-12-14 12:56:06,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 12:56:06,412 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:56:06,412 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 12:56:06,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:56:06,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:56:06,613 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:56:06,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:56:06,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1994380528, now seen corresponding path program 4 times [2022-12-14 12:56:06,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:56:06,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017622773] [2022-12-14 12:56:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:56:06,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:56:06,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:56:06,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970129172] [2022-12-14 12:56:06,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:56:06,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:56:06,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:56:06,688 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:56:06,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:56:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:56:06,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 12:56:06,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:56:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:56:07,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:56:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:56:07,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:56:07,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017622773] [2022-12-14 12:56:07,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:56:07,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970129172] [2022-12-14 12:56:07,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970129172] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:56:07,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1837979639] [2022-12-14 12:56:07,544 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:56:07,544 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:56:07,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:56:07,544 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:56:07,544 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:56:07,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:07,567 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 12:56:07,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 12:56:07,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:07,591 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 12:56:07,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 12:56:07,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:07,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:56:07,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-12-14 12:56:07,643 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:56:07,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 12:56:07,737 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:56:07,752 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:56:07,768 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:56:07,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 12:56:07,797 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:56:07,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 12:56:07,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 12:56:07,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 12:56:07,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 12:56:07,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 12:56:07,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 12:56:07,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 12:56:07,930 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:56:07,992 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:56:08,322 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '852#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= 0 (+ |ULTIMATE.start_main_~R~0#1| 2147483648)) (<= |ULTIMATE.start_main_~R~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:56:08,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:56:08,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:56:08,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2022-12-14 12:56:08,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114092244] [2022-12-14 12:56:08,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:56:08,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 12:56:08,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:56:08,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 12:56:08,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1140, Invalid=1616, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 12:56:08,326 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:56:08,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:56:08,425 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2022-12-14 12:56:08,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 12:56:08,425 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-14 12:56:08,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:56:08,426 INFO L225 Difference]: With dead ends: 62 [2022-12-14 12:56:08,426 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 12:56:08,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1140, Invalid=1616, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 12:56:08,428 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:56:08,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:56:08,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 12:56:08,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-12-14 12:56:08,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:56:08,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-12-14 12:56:08,444 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 30 [2022-12-14 12:56:08,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:56:08,445 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-12-14 12:56:08,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:56:08,445 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-12-14 12:56:08,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 12:56:08,446 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:56:08,446 INFO L195 NwaCegarLoop]: trace histogram [46, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 12:56:08,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:56:08,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:56:08,648 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:56:08,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:56:08,649 INFO L85 PathProgramCache]: Analyzing trace with hash -841139216, now seen corresponding path program 5 times [2022-12-14 12:56:08,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:56:08,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715212249] [2022-12-14 12:56:08,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:56:08,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:56:08,695 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:56:08,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240709573] [2022-12-14 12:56:08,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:56:08,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:56:08,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:56:08,697 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:56:08,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c413e829-47e8-4ee0-8692-9a50ea426798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process