./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/sum_natnum.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/sum_natnum.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9 --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 ff2ea40d6d25fb86e36a6b6b626bedee46fbbe211877b096a26da0b150125568 --- 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-6b4ec56 [2022-11-20 19:56:14,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:56:14,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:56:14,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:56:14,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:56:14,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:56:14,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:56:14,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:56:14,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:56:14,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:56:14,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:56:14,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:56:14,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:56:14,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:56:14,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:56:14,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:56:14,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:56:14,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:56:14,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:56:14,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:56:14,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:56:14,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:56:14,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:56:14,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:56:14,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:56:14,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:56:14,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:56:14,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:56:14,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:56:14,889 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:56:14,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:56:14,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:56:14,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:56:14,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:56:14,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:56:14,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:56:14,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:56:14,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:56:14,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:56:14,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:56:14,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:56:14,904 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 19:56:14,949 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:56:14,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:56:14,949 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:56:14,950 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:56:14,950 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:56:14,951 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:56:14,951 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:56:14,951 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:56:14,951 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:56:14,951 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:56:14,952 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:56:14,952 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:56:14,952 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:56:14,952 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:56:14,952 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:56:14,953 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:56:14,953 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:56:14,953 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:56:14,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:56:14,954 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:56:14,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:56:14,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:56:14,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:56:14,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 19:56:14,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:56:14,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 19:56:14,955 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:56:14,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 19:56:14,956 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:56:14,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 19:56:14,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:56:14,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:56:14,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:56:14,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:56:14,958 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:56:14,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:56:14,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 19:56:14,958 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:56:14,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:56:14,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 19:56:14,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:56:14,960 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_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff2ea40d6d25fb86e36a6b6b626bedee46fbbe211877b096a26da0b150125568 [2022-11-20 19:56:15,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:56:15,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:56:15,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:56:15,324 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:56:15,325 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:56:15,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/loops-crafted-1/sum_natnum.c [2022-11-20 19:56:18,503 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:56:18,698 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:56:18,699 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/sv-benchmarks/c/loops-crafted-1/sum_natnum.c [2022-11-20 19:56:18,706 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/data/31a2b73f0/8c1e1363dc58422db9689675d53d5089/FLAG0126ed17f [2022-11-20 19:56:18,727 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/data/31a2b73f0/8c1e1363dc58422db9689675d53d5089 [2022-11-20 19:56:18,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:56:18,735 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:56:18,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:56:18,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:56:18,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:56:18,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:56:18" (1/1) ... [2022-11-20 19:56:18,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4384a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:56:18, skipping insertion in model container [2022-11-20 19:56:18,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:56:18" (1/1) ... [2022-11-20 19:56:18,754 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:56:18,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:56:18,954 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_604524e9-597e-48e7-a722-340862dc91a1/sv-benchmarks/c/loops-crafted-1/sum_natnum.c[458,471] [2022-11-20 19:56:18,964 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:56:18,973 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:56:18,984 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_604524e9-597e-48e7-a722-340862dc91a1/sv-benchmarks/c/loops-crafted-1/sum_natnum.c[458,471] [2022-11-20 19:56:18,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:56:19,000 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:56:19,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:56:19 WrapperNode [2022-11-20 19:56:19,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:56:19,002 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:56:19,002 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:56:19,003 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:56:19,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:56:19" (1/1) ... [2022-11-20 19:56:19,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:56:19" (1/1) ... [2022-11-20 19:56:19,034 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 30 [2022-11-20 19:56:19,034 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:56:19,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:56:19,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:56:19,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:56:19,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:56:19" (1/1) ... [2022-11-20 19:56:19,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:56:19" (1/1) ... [2022-11-20 19:56:19,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:56:19" (1/1) ... [2022-11-20 19:56:19,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:56:19" (1/1) ... [2022-11-20 19:56:19,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:56:19" (1/1) ... [2022-11-20 19:56:19,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:56:19" (1/1) ... [2022-11-20 19:56:19,067 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:56:19" (1/1) ... [2022-11-20 19:56:19,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:56:19" (1/1) ... [2022-11-20 19:56:19,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:56:19,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:56:19,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:56:19,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:56:19,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:56:19" (1/1) ... [2022-11-20 19:56:19,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:56:19,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:56:19,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:56:19,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:56:19,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:56:19,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 19:56:19,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:56:19,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:56:19,206 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:56:19,208 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:56:19,318 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:56:19,346 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:56:19,347 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 19:56:19,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:56:19 BoogieIcfgContainer [2022-11-20 19:56:19,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:56:19,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:56:19,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:56:19,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:56:19,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:56:18" (1/3) ... [2022-11-20 19:56:19,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9ba53e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:56:19, skipping insertion in model container [2022-11-20 19:56:19,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:56:19" (2/3) ... [2022-11-20 19:56:19,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9ba53e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:56:19, skipping insertion in model container [2022-11-20 19:56:19,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:56:19" (3/3) ... [2022-11-20 19:56:19,361 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_natnum.c [2022-11-20 19:56:19,382 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:56:19,382 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:56:19,434 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:56:19,441 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;@67bb1ccf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:56:19,442 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 19:56:19,446 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:19,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 19:56:19,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:56:19,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 19:56:19,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:56:19,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:56:19,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1880294, now seen corresponding path program 1 times [2022-11-20 19:56:19,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:56:19,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745366017] [2022-11-20 19:56:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:56:19,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:56:19,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:56:19,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890003727] [2022-11-20 19:56:19,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:56:19,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:19,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:56:19,575 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:56:19,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 19:56:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:56:19,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:56:19,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:56:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:56:19,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:56:19,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:56:19,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745366017] [2022-11-20 19:56:19,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:56:19,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890003727] [2022-11-20 19:56:19,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890003727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:56:19,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:56:19,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:56:19,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332406802] [2022-11-20 19:56:19,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:56:19,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:56:19,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:56:19,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:56:19,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:56:19,868 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:21,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 19:56:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:56:21,933 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-11-20 19:56:21,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:56:21,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 19:56:21,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:56:21,944 INFO L225 Difference]: With dead ends: 13 [2022-11-20 19:56:21,944 INFO L226 Difference]: Without dead ends: 6 [2022-11-20 19:56:21,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:56:21,950 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:56:21,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-11-20 19:56:21,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2022-11-20 19:56:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2022-11-20 19:56:21,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2022-11-20 19:56:21,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2022-11-20 19:56:21,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:56:21,986 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2022-11-20 19:56:21,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:21,986 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2022-11-20 19:56:21,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 19:56:21,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:56:21,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 19:56:21,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 19:56:22,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 19:56:22,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:56:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:56:22,193 INFO L85 PathProgramCache]: Analyzing trace with hash 57619255, now seen corresponding path program 1 times [2022-11-20 19:56:22,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:56:22,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995306591] [2022-11-20 19:56:22,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:56:22,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:56:22,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:56:22,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255154342] [2022-11-20 19:56:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:56:22,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:22,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:56:22,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:56:22,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 19:56:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:56:22,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 19:56:22,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:56:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:56:22,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:56:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:56:22,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:56:22,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995306591] [2022-11-20 19:56:22,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:56:22,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255154342] [2022-11-20 19:56:22,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255154342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:56:22,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [909115496] [2022-11-20 19:56:22,428 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-20 19:56:22,430 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:56:22,434 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:56:22,440 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:56:22,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:56:22,765 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:56:23,848 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '77#(and (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= (ite (= (mod (ite (and (not (= (mod (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2) 0)) (< (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 0)) (+ (div (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2) 1) (div (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2)) 18446744073709551616) (mod |ULTIMATE.start_main_~sum~0#1| 18446744073709551616)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= 40000 ~SIZE~0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= ~SIZE~0 40000) (= |#NULL.base| 0))' at error location [2022-11-20 19:56:23,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:56:23,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:56:23,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-20 19:56:23,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333849001] [2022-11-20 19:56:23,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:56:23,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:56:23,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:56:23,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:56:23,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:56:23,856 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:25,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 19:56:25,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:56:25,876 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2022-11-20 19:56:25,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:56:25,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 19:56:25,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:56:25,879 INFO L225 Difference]: With dead ends: 12 [2022-11-20 19:56:25,879 INFO L226 Difference]: Without dead ends: 9 [2022-11-20 19:56:25,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:56:25,881 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:56:25,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-11-20 19:56:25,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-20 19:56:25,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-20 19:56:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-20 19:56:25,885 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-20 19:56:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:56:25,886 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-20 19:56:25,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-20 19:56:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 19:56:25,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:56:25,887 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2022-11-20 19:56:25,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 19:56:26,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:26,093 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:56:26,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:56:26,093 INFO L85 PathProgramCache]: Analyzing trace with hash -2116862682, now seen corresponding path program 2 times [2022-11-20 19:56:26,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:56:26,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125025761] [2022-11-20 19:56:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:56:26,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:56:26,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:56:26,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127936787] [2022-11-20 19:56:26,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:56:26,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:26,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:56:26,112 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:56:26,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 19:56:26,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 19:56:26,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:56:26,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:56:26,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:56:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:56:26,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:56:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:56:26,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:56:26,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125025761] [2022-11-20 19:56:26,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:56:26,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127936787] [2022-11-20 19:56:26,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127936787] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:56:26,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [804568942] [2022-11-20 19:56:26,344 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-20 19:56:26,346 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:56:26,347 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:56:26,347 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:56:26,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:56:26,420 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:56:28,755 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '165#(and (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= (ite (= (mod (ite (and (not (= (mod (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2) 0)) (< (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 0)) (+ (div (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2) 1) (div (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2)) 18446744073709551616) (mod |ULTIMATE.start_main_~sum~0#1| 18446744073709551616)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~sum~0#1|) (= ~SIZE~0 40000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:56:28,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:56:28,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:56:28,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-20 19:56:28,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60976554] [2022-11-20 19:56:28,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:56:28,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 19:56:28,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:56:28,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 19:56:28,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-20 19:56:28,758 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 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) [2022-11-20 19:56:30,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 19:56:30,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:56:30,805 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2022-11-20 19:56:30,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 19:56:30,808 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 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) Word has length 8 [2022-11-20 19:56:30,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:56:30,809 INFO L225 Difference]: With dead ends: 18 [2022-11-20 19:56:30,809 INFO L226 Difference]: Without dead ends: 15 [2022-11-20 19:56:30,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-20 19:56:30,811 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:56:30,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-11-20 19:56:30,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-20 19:56:30,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-20 19:56:30,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-20 19:56:30,816 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2022-11-20 19:56:30,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:56:30,816 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-20 19:56:30,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 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) [2022-11-20 19:56:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-20 19:56:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 19:56:30,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:56:30,817 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2022-11-20 19:56:30,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 19:56:31,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:31,018 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:56:31,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:56:31,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1541264262, now seen corresponding path program 3 times [2022-11-20 19:56:31,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:56:31,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186223500] [2022-11-20 19:56:31,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:56:31,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:56:31,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:56:31,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727437392] [2022-11-20 19:56:31,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:56:31,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:31,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:56:31,049 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:56:31,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 19:56:31,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:56:31,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:56:31,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 19:56:31,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:56:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:56:31,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:56:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:56:31,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:56:31,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186223500] [2022-11-20 19:56:31,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:56:31,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727437392] [2022-11-20 19:56:31,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727437392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:56:31,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1047624125] [2022-11-20 19:56:31,642 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-20 19:56:31,642 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:56:31,642 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:56:31,642 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:56:31,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:56:31,730 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:56:34,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '325#(and (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= (ite (= (mod (ite (and (not (= (mod (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2) 0)) (< (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 0)) (+ (div (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2) 1) (div (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2)) 18446744073709551616) (mod |ULTIMATE.start_main_~sum~0#1| 18446744073709551616)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= 40000 ~SIZE~0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= ~SIZE~0 40000) (= |#NULL.base| 0))' at error location [2022-11-20 19:56:34,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:56:34,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:56:34,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-20 19:56:34,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864663384] [2022-11-20 19:56:34,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:56:34,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 19:56:34,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:56:34,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 19:56:34,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2022-11-20 19:56:34,298 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:36,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 19:56:36,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:56:36,355 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2022-11-20 19:56:36,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 19:56:36,356 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 19:56:36,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:56:36,357 INFO L225 Difference]: With dead ends: 30 [2022-11-20 19:56:36,357 INFO L226 Difference]: Without dead ends: 27 [2022-11-20 19:56:36,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2022-11-20 19:56:36,359 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:56:36,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 24 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-11-20 19:56:36,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-20 19:56:36,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-20 19:56:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:36,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-11-20 19:56:36,366 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2022-11-20 19:56:36,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:56:36,366 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-11-20 19:56:36,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:36,366 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-11-20 19:56:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 19:56:36,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:56:36,367 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2022-11-20 19:56:36,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 19:56:36,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:36,573 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:56:36,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:56:36,574 INFO L85 PathProgramCache]: Analyzing trace with hash 359802950, now seen corresponding path program 4 times [2022-11-20 19:56:36,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:56:36,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917729795] [2022-11-20 19:56:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:56:36,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:56:36,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:56:36,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395327773] [2022-11-20 19:56:36,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 19:56:36,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:36,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:56:36,642 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:56:36,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 19:56:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:56:36,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 19:56:36,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:56:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:56:37,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:56:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:56:38,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:56:38,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917729795] [2022-11-20 19:56:38,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:56:38,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395327773] [2022-11-20 19:56:38,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395327773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:56:38,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1510027608] [2022-11-20 19:56:38,248 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-20 19:56:38,248 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:56:38,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:56:38,249 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:56:38,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:56:38,318 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:56:40,484 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '629#(and (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= (ite (= (mod (ite (and (not (= (mod (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2) 0)) (< (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 0)) (+ (div (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2) 1) (div (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2)) 18446744073709551616) (mod |ULTIMATE.start_main_~sum~0#1| 18446744073709551616)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= 40000 ~SIZE~0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= ~SIZE~0 40000) (= |#NULL.base| 0))' at error location [2022-11-20 19:56:40,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:56:40,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:56:40,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2022-11-20 19:56:40,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319353368] [2022-11-20 19:56:40,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:56:40,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 19:56:40,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:56:40,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 19:56:40,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1137, Invalid=1413, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 19:56:40,489 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 48 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:42,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 19:56:42,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:56:42,602 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2022-11-20 19:56:42,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 19:56:42,604 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-20 19:56:42,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:56:42,605 INFO L225 Difference]: With dead ends: 54 [2022-11-20 19:56:42,605 INFO L226 Difference]: Without dead ends: 51 [2022-11-20 19:56:42,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1137, Invalid=1413, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 19:56:42,607 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:56:42,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 19:56:42,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-20 19:56:42,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-20 19:56:42,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-11-20 19:56:42,630 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2022-11-20 19:56:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:56:42,630 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-11-20 19:56:42,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:42,631 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-11-20 19:56:42,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 19:56:42,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:56:42,632 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2022-11-20 19:56:42,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 19:56:42,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:42,837 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:56:42,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:56:42,838 INFO L85 PathProgramCache]: Analyzing trace with hash 746549702, now seen corresponding path program 5 times [2022-11-20 19:56:42,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:56:42,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21984527] [2022-11-20 19:56:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:56:42,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:56:42,904 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:56:42,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653814079] [2022-11-20 19:56:42,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:56:42,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:42,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:56:42,912 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:56:42,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 19:56:43,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-20 19:56:43,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:56:43,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-20 19:56:43,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:56:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:56:44,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:56:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:56:48,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:56:48,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21984527] [2022-11-20 19:56:48,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:56:48,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653814079] [2022-11-20 19:56:48,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653814079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:56:48,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152295043] [2022-11-20 19:56:48,069 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-20 19:56:48,069 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:56:48,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:56:48,070 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:56:48,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:56:48,113 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:56:52,050 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1221#(and (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= (ite (= (mod (ite (and (not (= (mod (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2) 0)) (< (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 0)) (+ (div (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2) 1) (div (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2)) 18446744073709551616) (mod |ULTIMATE.start_main_~sum~0#1| 18446744073709551616)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~sum~0#1|) (= ~SIZE~0 40000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:56:52,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:56:52,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:56:52,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2022-11-20 19:56:52,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596899687] [2022-11-20 19:56:52,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:56:52,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-20 19:56:52,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:56:52,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-20 19:56:52,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4569, Invalid=5133, Unknown=0, NotChecked=0, Total=9702 [2022-11-20 19:56:52,057 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 96 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:54,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 19:56:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:56:54,305 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2022-11-20 19:56:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-20 19:56:54,310 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 95 states have internal predecessors, (98), 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 50 [2022-11-20 19:56:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:56:54,311 INFO L225 Difference]: With dead ends: 102 [2022-11-20 19:56:54,311 INFO L226 Difference]: Without dead ends: 99 [2022-11-20 19:56:54,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=4569, Invalid=5133, Unknown=0, NotChecked=0, Total=9702 [2022-11-20 19:56:54,316 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:56:54,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 96 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 19:56:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-20 19:56:54,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-20 19:56:54,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:54,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-11-20 19:56:54,330 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2022-11-20 19:56:54,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:56:54,330 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-11-20 19:56:54,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:54,331 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-11-20 19:56:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-20 19:56:54,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:56:54,333 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1] [2022-11-20 19:56:54,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 19:56:54,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:54,539 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:56:54,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:56:54,539 INFO L85 PathProgramCache]: Analyzing trace with hash -177437498, now seen corresponding path program 6 times [2022-11-20 19:56:54,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:56:54,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136717315] [2022-11-20 19:56:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:56:54,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:56:54,598 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:56:54,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56350985] [2022-11-20 19:56:54,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:56:54,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:54,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:56:54,600 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:56:54,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 19:56:54,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:56:54,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:56:54,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-20 19:56:54,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:56:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:56:59,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:57:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:57:12,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:57:12,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136717315] [2022-11-20 19:57:12,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:57:12,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56350985] [2022-11-20 19:57:12,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56350985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:57:12,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1599568412] [2022-11-20 19:57:12,329 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-20 19:57:12,329 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:57:12,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:57:12,330 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:57:12,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:57:12,374 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:57:12,786 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2389#(and (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= (ite (= (mod (ite (and (not (= (mod (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2) 0)) (< (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 0)) (+ (div (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2) 1) (div (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2)) 18446744073709551616) (mod |ULTIMATE.start_main_~sum~0#1| 18446744073709551616)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~sum~0#1|) (= ~SIZE~0 40000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:57:12,786 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:57:12,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:57:12,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 191 [2022-11-20 19:57:12,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381001544] [2022-11-20 19:57:12,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:57:12,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2022-11-20 19:57:12,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:57:12,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2022-11-20 19:57:12,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18345, Invalid=19485, Unknown=0, NotChecked=0, Total=37830 [2022-11-20 19:57:12,799 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 192 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 191 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:57:15,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 19:57:15,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:57:15,420 INFO L93 Difference]: Finished difference Result 198 states and 293 transitions. [2022-11-20 19:57:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-20 19:57:15,423 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 191 states have internal predecessors, (194), 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 98 [2022-11-20 19:57:15,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:57:15,424 INFO L225 Difference]: With dead ends: 198 [2022-11-20 19:57:15,425 INFO L226 Difference]: Without dead ends: 195 [2022-11-20 19:57:15,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=18345, Invalid=19485, Unknown=0, NotChecked=0, Total=37830 [2022-11-20 19:57:15,429 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 101 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:57:15,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 192 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 19:57:15,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-20 19:57:15,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-11-20 19:57:15,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:57:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2022-11-20 19:57:15,453 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2022-11-20 19:57:15,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:57:15,454 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2022-11-20 19:57:15,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 191 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:57:15,455 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2022-11-20 19:57:15,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-20 19:57:15,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:57:15,460 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1] [2022-11-20 19:57:15,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 19:57:15,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:57:15,666 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:57:15,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:57:15,667 INFO L85 PathProgramCache]: Analyzing trace with hash 210807494, now seen corresponding path program 7 times [2022-11-20 19:57:15,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:57:15,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380063769] [2022-11-20 19:57:15,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:57:15,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:57:15,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:57:15,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454221790] [2022-11-20 19:57:15,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 19:57:15,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:57:15,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:57:15,783 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:57:15,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 19:57:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:57:16,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 193 conjunts are in the unsatisfiable core [2022-11-20 19:57:16,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:57:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:57:33,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:58:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:58:25,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:58:25,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380063769] [2022-11-20 19:58:25,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 19:58:25,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454221790] [2022-11-20 19:58:25,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454221790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:58:25,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1173688191] [2022-11-20 19:58:25,256 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-20 19:58:25,256 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:58:25,256 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:58:25,257 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:58:25,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:58:25,303 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:58:26,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4709#(and (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= (ite (= (mod (ite (and (not (= (mod (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2) 0)) (< (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 0)) (+ (div (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2) 1) (div (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2)) 18446744073709551616) (mod |ULTIMATE.start_main_~sum~0#1| 18446744073709551616)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~sum~0#1|) (= ~SIZE~0 40000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:58:26,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:58:26,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:58:26,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192] total 383 [2022-11-20 19:58:26,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962935143] [2022-11-20 19:58:26,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:58:26,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2022-11-20 19:58:26,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:58:26,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2022-11-20 19:58:26,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73545, Invalid=75837, Unknown=0, NotChecked=0, Total=149382 [2022-11-20 19:58:26,153 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 384 states, 384 states have (on average 1.0052083333333333) internal successors, (386), 383 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:58:31,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 19:58:31,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:58:31,037 INFO L93 Difference]: Finished difference Result 390 states and 581 transitions. [2022-11-20 19:58:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-20 19:58:31,040 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 384 states have (on average 1.0052083333333333) internal successors, (386), 383 states have internal predecessors, (386), 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 194 [2022-11-20 19:58:31,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:58:31,042 INFO L225 Difference]: With dead ends: 390 [2022-11-20 19:58:31,043 INFO L226 Difference]: Without dead ends: 387 [2022-11-20 19:58:31,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 68.7s TimeCoverageRelationStatistics Valid=73545, Invalid=75837, Unknown=0, NotChecked=0, Total=149382 [2022-11-20 19:58:31,053 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 195 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 19:58:31,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 384 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-20 19:58:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-11-20 19:58:31,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2022-11-20 19:58:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0025906735751295) internal successors, (387), 386 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:58:31,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2022-11-20 19:58:31,097 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2022-11-20 19:58:31,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:58:31,097 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2022-11-20 19:58:31,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 384 states have (on average 1.0052083333333333) internal successors, (386), 383 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:58:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2022-11-20 19:58:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-11-20 19:58:31,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:58:31,107 INFO L195 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1] [2022-11-20 19:58:31,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 19:58:31,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 19:58:31,315 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:58:31,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:58:31,315 INFO L85 PathProgramCache]: Analyzing trace with hash 536934086, now seen corresponding path program 8 times [2022-11-20 19:58:31,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:58:31,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826114232] [2022-11-20 19:58:31,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:58:31,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:58:31,431 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 19:58:31,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819097805] [2022-11-20 19:58:31,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:58:31,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:58:31,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:58:31,433 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:58:31,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 19:58:33,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 192 check-sat command(s) [2022-11-20 19:58:33,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:58:33,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 1949 conjuncts, 385 conjunts are in the unsatisfiable core [2022-11-20 19:58:33,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:59:45,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:13,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:03:13,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826114232] [2022-11-20 20:03:13,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:03:13,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819097805] [2022-11-20 20:03:13,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819097805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:13,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1706648155] [2022-11-20 20:03:14,000 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-20 20:03:14,000 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:03:14,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:03:14,001 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:03:14,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:03:14,047 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:03:18,237 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9333#(and (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= (ite (= (mod (ite (and (not (= (mod (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2) 0)) (< (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 0)) (+ (div (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2) 1) (div (+ ~SIZE~0 (* ~SIZE~0 ~SIZE~0)) 2)) 18446744073709551616) (mod |ULTIMATE.start_main_~sum~0#1| 18446744073709551616)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= 40000 ~SIZE~0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= ~SIZE~0 40000) (= |#NULL.base| 0))' at error location [2022-11-20 20:03:18,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:03:18,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:03:18,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384] total 767 [2022-11-20 20:03:18,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813632796] [2022-11-20 20:03:18,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:03:18,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2022-11-20 20:03:18,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:03:18,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2022-11-20 20:03:18,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294537, Invalid=299133, Unknown=0, NotChecked=0, Total=593670 [2022-11-20 20:03:18,327 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand has 768 states, 768 states have (on average 1.0026041666666667) internal successors, (770), 767 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:34,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:03:34,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:34,168 INFO L93 Difference]: Finished difference Result 774 states and 1157 transitions. [2022-11-20 20:03:34,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2022-11-20 20:03:34,170 INFO L78 Accepts]: Start accepts. Automaton has has 768 states, 768 states have (on average 1.0026041666666667) internal successors, (770), 767 states have internal predecessors, (770), 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 386 [2022-11-20 20:03:34,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:34,173 INFO L225 Difference]: With dead ends: 774 [2022-11-20 20:03:34,173 INFO L226 Difference]: Without dead ends: 771 [2022-11-20 20:03:34,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1156 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 769 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3441 ImplicationChecksByTransitivity, 282.2s TimeCoverageRelationStatistics Valid=294537, Invalid=299133, Unknown=0, NotChecked=0, Total=593670 [2022-11-20 20:03:34,207 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 389 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:34,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 768 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 20:03:34,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-11-20 20:03:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2022-11-20 20:03:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.0012987012987014) internal successors, (771), 770 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:34,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 771 transitions. [2022-11-20 20:03:34,267 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 771 transitions. Word has length 386 [2022-11-20 20:03:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:34,268 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 771 transitions. [2022-11-20 20:03:34,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 768 states, 768 states have (on average 1.0026041666666667) internal successors, (770), 767 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:34,270 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 771 transitions. [2022-11-20 20:03:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2022-11-20 20:03:34,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:34,294 INFO L195 NwaCegarLoop]: trace histogram [766, 1, 1, 1, 1] [2022-11-20 20:03:34,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:34,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:03:34,504 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:03:34,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:34,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1535217350, now seen corresponding path program 9 times [2022-11-20 20:03:34,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:03:34,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194559853] [2022-11-20 20:03:34,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:34,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:03:34,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:03:34,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543854176] [2022-11-20 20:03:34,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:03:34,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:03:34,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:03:34,653 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:03:34,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_604524e9-597e-48e7-a722-340862dc91a1/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 20:03:38,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:03:38,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:03:39,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 3869 conjuncts, 769 conjunts are in the unsatisfiable core [2022-11-20 20:03:39,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:08:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 293761 backedges. 0 proven. 293761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:08:28,546 INFO L328 TraceCheckSpWp]: Computing backward predicates...