./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de42.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de42.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0 --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 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 --- 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-e04fb08 [2022-11-16 16:08:03,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:08:03,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:08:03,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:08:03,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:08:03,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:08:03,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:08:03,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:08:03,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:08:03,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:08:03,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:08:03,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:08:03,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:08:03,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:08:03,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:08:03,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:08:03,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:08:03,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:08:03,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:08:03,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:08:03,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:08:03,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:08:03,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:08:03,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:08:03,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:08:03,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:08:03,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:08:03,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:08:03,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:08:03,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:08:03,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:08:03,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:08:03,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:08:03,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:08:03,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:08:03,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:08:03,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:08:03,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:08:03,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:08:03,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:08:03,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:08:03,195 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 16:08:03,239 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:08:03,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:08:03,240 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:08:03,241 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:08:03,241 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:08:03,242 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:08:03,242 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:08:03,242 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:08:03,242 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:08:03,243 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 16:08:03,244 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:08:03,244 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:08:03,244 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 16:08:03,244 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 16:08:03,244 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:08:03,245 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 16:08:03,245 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 16:08:03,245 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 16:08:03,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:08:03,246 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:08:03,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:08:03,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:08:03,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:08:03,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 16:08:03,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:08:03,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 16:08:03,249 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:08:03,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 16:08:03,249 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:08:03,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 16:08:03,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:08:03,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:08:03,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:08:03,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:08:03,251 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 16:08:03,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:08:03,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 16:08:03,251 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 16:08:03,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 16:08:03,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 16:08:03,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:08:03,252 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_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 [2022-11-16 16:08:03,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:08:03,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:08:03,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:08:03,594 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:08:03,595 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:08:03,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/loops-crafted-1/in-de42.c [2022-11-16 16:08:03,671 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/data/7aea6eea0/26c4a758aeee464cb1fc850e27bcdfb5/FLAGbf8b366e5 [2022-11-16 16:08:04,175 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:08:04,176 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/sv-benchmarks/c/loops-crafted-1/in-de42.c [2022-11-16 16:08:04,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/data/7aea6eea0/26c4a758aeee464cb1fc850e27bcdfb5/FLAGbf8b366e5 [2022-11-16 16:08:04,525 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/data/7aea6eea0/26c4a758aeee464cb1fc850e27bcdfb5 [2022-11-16 16:08:04,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:08:04,529 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:08:04,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:08:04,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:08:04,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:08:04,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:08:04" (1/1) ... [2022-11-16 16:08:04,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769ced1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:04, skipping insertion in model container [2022-11-16 16:08:04,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:08:04" (1/1) ... [2022-11-16 16:08:04,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:08:04,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:08:04,746 WARN L229 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_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/sv-benchmarks/c/loops-crafted-1/in-de42.c[368,381] [2022-11-16 16:08:04,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:08:04,782 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:08:04,798 WARN L229 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_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/sv-benchmarks/c/loops-crafted-1/in-de42.c[368,381] [2022-11-16 16:08:04,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:08:04,828 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:08:04,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:04 WrapperNode [2022-11-16 16:08:04,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:08:04,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:08:04,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:08:04,833 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:08:04,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:04" (1/1) ... [2022-11-16 16:08:04,849 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:04" (1/1) ... [2022-11-16 16:08:04,875 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-11-16 16:08:04,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:08:04,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:08:04,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:08:04,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:08:04,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:04" (1/1) ... [2022-11-16 16:08:04,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:04" (1/1) ... [2022-11-16 16:08:04,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:04" (1/1) ... [2022-11-16 16:08:04,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:04" (1/1) ... [2022-11-16 16:08:04,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:04" (1/1) ... [2022-11-16 16:08:04,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:04" (1/1) ... [2022-11-16 16:08:04,921 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:04" (1/1) ... [2022-11-16 16:08:04,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:04" (1/1) ... [2022-11-16 16:08:04,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:08:04,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:08:04,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:08:04,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:08:04,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:04" (1/1) ... [2022-11-16 16:08:04,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:08:04,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:08:04,969 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:08:04,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:08:05,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 16:08:05,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:08:05,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:08:05,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 16:08:05,106 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:08:05,108 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:08:05,316 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:08:05,357 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:08:05,358 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 16:08:05,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:08:05 BoogieIcfgContainer [2022-11-16 16:08:05,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:08:05,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:08:05,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:08:05,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:08:05,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:08:04" (1/3) ... [2022-11-16 16:08:05,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba3c874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:08:05, skipping insertion in model container [2022-11-16 16:08:05,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:04" (2/3) ... [2022-11-16 16:08:05,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba3c874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:08:05, skipping insertion in model container [2022-11-16 16:08:05,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:08:05" (3/3) ... [2022-11-16 16:08:05,370 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de42.c [2022-11-16 16:08:05,390 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:08:05,390 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 16:08:05,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:08:05,493 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;@31478b48, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:08:05,506 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 16:08:05,510 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 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) [2022-11-16 16:08:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:08:05,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:05,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:05,518 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:08:05,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1429195548, now seen corresponding path program 1 times [2022-11-16 16:08:05,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:05,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179347565] [2022-11-16 16:08:05,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:05,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:06,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:06,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179347565] [2022-11-16 16:08:06,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179347565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:08:06,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:08:06,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 16:08:06,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711593953] [2022-11-16 16:08:06,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:08:06,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:08:06,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:06,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:08:06,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:08:06,366 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 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) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 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) [2022-11-16 16:08:06,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:06,621 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2022-11-16 16:08:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 16:08:06,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 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 7 [2022-11-16 16:08:06,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:06,632 INFO L225 Difference]: With dead ends: 36 [2022-11-16 16:08:06,632 INFO L226 Difference]: Without dead ends: 23 [2022-11-16 16:08:06,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-16 16:08:06,639 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:06,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 13 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:08:06,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-16 16:08:06,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 12. [2022-11-16 16:08:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 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) [2022-11-16 16:08:06,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2022-11-16 16:08:06,675 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 18 transitions. Word has length 7 [2022-11-16 16:08:06,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:06,676 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 18 transitions. [2022-11-16 16:08:06,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 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) [2022-11-16 16:08:06,676 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 18 transitions. [2022-11-16 16:08:06,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:08:06,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:06,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:06,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 16:08:06,677 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:08:06,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:06,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1320429763, now seen corresponding path program 1 times [2022-11-16 16:08:06,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:06,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607365863] [2022-11-16 16:08:06,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:06,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:06,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:06,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607365863] [2022-11-16 16:08:06,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607365863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:08:06,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:08:06,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:08:06,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044327835] [2022-11-16 16:08:06,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:08:06,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:08:06,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:06,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:08:06,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:08:06,734 INFO L87 Difference]: Start difference. First operand 12 states and 18 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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) [2022-11-16 16:08:06,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:06,757 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2022-11-16 16:08:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:08:06,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 8 [2022-11-16 16:08:06,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:06,758 INFO L225 Difference]: With dead ends: 23 [2022-11-16 16:08:06,758 INFO L226 Difference]: Without dead ends: 18 [2022-11-16 16:08:06,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:08:06,760 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:06,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:08:06,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-16 16:08:06,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2022-11-16 16:08:06,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:08:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2022-11-16 16:08:06,767 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 20 transitions. Word has length 8 [2022-11-16 16:08:06,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:06,768 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 20 transitions. [2022-11-16 16:08:06,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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) [2022-11-16 16:08:06,768 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 20 transitions. [2022-11-16 16:08:06,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:08:06,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:06,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:06,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 16:08:06,769 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:08:06,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:06,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1354719204, now seen corresponding path program 1 times [2022-11-16 16:08:06,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:06,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18643308] [2022-11-16 16:08:06,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:06,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:06,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:06,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18643308] [2022-11-16 16:08:06,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18643308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:08:06,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:08:06,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:08:06,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648661731] [2022-11-16 16:08:06,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:08:06,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:08:06,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:06,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:08:06,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:08:06,805 INFO L87 Difference]: Start difference. First operand 14 states and 20 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2022-11-16 16:08:06,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:06,832 INFO L93 Difference]: Finished difference Result 21 states and 30 transitions. [2022-11-16 16:08:06,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:08:06,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 8 [2022-11-16 16:08:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:06,834 INFO L225 Difference]: With dead ends: 21 [2022-11-16 16:08:06,834 INFO L226 Difference]: Without dead ends: 15 [2022-11-16 16:08:06,834 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 [2022-11-16 16:08:06,836 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:06,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:08:06,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-16 16:08:06,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-16 16:08:06,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 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) [2022-11-16 16:08:06,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2022-11-16 16:08:06,842 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 22 transitions. Word has length 8 [2022-11-16 16:08:06,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:06,843 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 22 transitions. [2022-11-16 16:08:06,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2022-11-16 16:08:06,843 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 22 transitions. [2022-11-16 16:08:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:08:06,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:06,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:06,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 16:08:06,844 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:08:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:06,845 INFO L85 PathProgramCache]: Analyzing trace with hash 35812052, now seen corresponding path program 1 times [2022-11-16 16:08:06,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:06,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776936615] [2022-11-16 16:08:06,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:06,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:06,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:06,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776936615] [2022-11-16 16:08:06,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776936615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:08:06,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:08:06,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:08:06,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225370332] [2022-11-16 16:08:06,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:08:06,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:08:06,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:06,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:08:06,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:08:06,940 INFO L87 Difference]: Start difference. First operand 15 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-11-16 16:08:07,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:07,005 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2022-11-16 16:08:07,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:08:07,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 [2022-11-16 16:08:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:07,007 INFO L225 Difference]: With dead ends: 19 [2022-11-16 16:08:07,007 INFO L226 Difference]: Without dead ends: 12 [2022-11-16 16:08:07,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:08:07,026 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:07,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 11 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:08:07,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-16 16:08:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-16 16:08:07,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:08:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-11-16 16:08:07,031 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 8 [2022-11-16 16:08:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:07,032 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-11-16 16:08:07,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-11-16 16:08:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-11-16 16:08:07,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:08:07,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:07,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:07,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 16:08:07,033 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:08:07,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:07,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1188105689, now seen corresponding path program 1 times [2022-11-16 16:08:07,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:07,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714761113] [2022-11-16 16:08:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:07,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:07,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:07,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714761113] [2022-11-16 16:08:07,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714761113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:08:07,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051267326] [2022-11-16 16:08:07,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:07,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:07,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:08:07,150 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:08:07,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 16:08:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:07,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 16:08:07,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:08:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:07,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:08:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:07,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051267326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:08:07,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1486395962] [2022-11-16 16:08:07,392 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:08:07,393 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:08:07,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:08:07,403 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:08:07,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:08:07,576 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:08:07,827 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '336#(and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:08:07,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:08:07,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:08:07,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-16 16:08:07,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444472563] [2022-11-16 16:08:07,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:08:07,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 16:08:07,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:07,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 16:08:07,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-11-16 16:08:07,829 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 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) [2022-11-16 16:08:08,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:08,016 INFO L93 Difference]: Finished difference Result 38 states and 60 transitions. [2022-11-16 16:08:08,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 16:08:08,017 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 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 [2022-11-16 16:08:08,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:08,018 INFO L225 Difference]: With dead ends: 38 [2022-11-16 16:08:08,018 INFO L226 Difference]: Without dead ends: 31 [2022-11-16 16:08:08,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-11-16 16:08:08,020 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:08,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 17 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:08:08,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-16 16:08:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2022-11-16 16:08:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:08:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2022-11-16 16:08:08,046 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2022-11-16 16:08:08,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:08,047 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2022-11-16 16:08:08,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 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) [2022-11-16 16:08:08,047 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2022-11-16 16:08:08,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:08:08,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:08,048 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:08,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 16:08:08,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:08,253 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:08:08,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:08,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1595406250, now seen corresponding path program 1 times [2022-11-16 16:08:08,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:08,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274280620] [2022-11-16 16:08:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:08,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:08:08,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:08,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274280620] [2022-11-16 16:08:08,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274280620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:08:08,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224695143] [2022-11-16 16:08:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:08,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:08,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:08:08,390 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:08:08,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 16:08:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:08,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:08:08,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:08:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:08:08,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:08:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:08:08,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224695143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:08:08,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2039243506] [2022-11-16 16:08:08,531 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:08:08,531 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:08:08,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:08:08,532 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:08:08,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:08:08,651 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:08:08,755 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '513#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:08:08,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:08:08,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:08:08,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-16 16:08:08,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103449618] [2022-11-16 16:08:08,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:08:08,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:08:08,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:08,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:08:08,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:08:08,758 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:08:08,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:08,809 INFO L93 Difference]: Finished difference Result 34 states and 49 transitions. [2022-11-16 16:08:08,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:08:08,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 16:08:08,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:08,811 INFO L225 Difference]: With dead ends: 34 [2022-11-16 16:08:08,811 INFO L226 Difference]: Without dead ends: 31 [2022-11-16 16:08:08,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:08:08,812 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:08,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:08:08,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-16 16:08:08,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-11-16 16:08:08,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 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) [2022-11-16 16:08:08,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 44 transitions. [2022-11-16 16:08:08,850 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 44 transitions. Word has length 10 [2022-11-16 16:08:08,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:08,852 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 44 transitions. [2022-11-16 16:08:08,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:08:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 44 transitions. [2022-11-16 16:08:08,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:08:08,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:08,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:08,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 16:08:09,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:09,060 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:08:09,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:09,061 INFO L85 PathProgramCache]: Analyzing trace with hash 2081343978, now seen corresponding path program 1 times [2022-11-16 16:08:09,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:09,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346989870] [2022-11-16 16:08:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:09,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:09,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:09,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346989870] [2022-11-16 16:08:09,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346989870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:08:09,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065247532] [2022-11-16 16:08:09,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:09,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:09,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:08:09,515 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:08:09,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 16:08:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:09,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 16:08:09,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:08:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:09,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:08:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:10,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065247532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:08:10,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1223773255] [2022-11-16 16:08:10,067 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:08:10,067 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:08:10,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:08:10,067 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:08:10,068 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:08:10,235 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:08:10,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '713#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:08:10,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:08:10,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:08:10,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-11-16 16:08:10,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088874798] [2022-11-16 16:08:10,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:08:10,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 16:08:10,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:10,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 16:08:10,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-11-16 16:08:10,442 INFO L87 Difference]: Start difference. First operand 30 states and 44 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 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) [2022-11-16 16:08:11,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:11,080 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2022-11-16 16:08:11,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 16:08:11,081 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 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 11 [2022-11-16 16:08:11,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:11,081 INFO L225 Difference]: With dead ends: 39 [2022-11-16 16:08:11,081 INFO L226 Difference]: Without dead ends: 31 [2022-11-16 16:08:11,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-11-16 16:08:11,083 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:11,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 16:08:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-16 16:08:11,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-11-16 16:08:11,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 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) [2022-11-16 16:08:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2022-11-16 16:08:11,098 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 11 [2022-11-16 16:08:11,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:11,098 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2022-11-16 16:08:11,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 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) [2022-11-16 16:08:11,099 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2022-11-16 16:08:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:08:11,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:11,099 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:11,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 16:08:11,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 16:08:11,306 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:08:11,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:11,306 INFO L85 PathProgramCache]: Analyzing trace with hash -280578596, now seen corresponding path program 2 times [2022-11-16 16:08:11,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:11,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164725616] [2022-11-16 16:08:11,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:11,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:11,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:11,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164725616] [2022-11-16 16:08:11,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164725616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:08:11,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374823590] [2022-11-16 16:08:11,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:08:11,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:11,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:08:11,421 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:08:11,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 16:08:11,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 16:08:11,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:08:11,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:08:11,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:08:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:11,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:08:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:11,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374823590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:08:11,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330112010] [2022-11-16 16:08:11,640 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:08:11,640 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:08:11,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:08:11,641 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:08:11,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:08:11,699 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:08:11,966 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '923#(and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:08:11,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:08:11,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:08:11,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-16 16:08:11,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357292722] [2022-11-16 16:08:11,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:08:11,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 16:08:11,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:11,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 16:08:11,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-11-16 16:08:11,969 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:08:13,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:13,038 INFO L93 Difference]: Finished difference Result 101 states and 172 transitions. [2022-11-16 16:08:13,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 16:08:13,039 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 16:08:13,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:13,040 INFO L225 Difference]: With dead ends: 101 [2022-11-16 16:08:13,040 INFO L226 Difference]: Without dead ends: 92 [2022-11-16 16:08:13,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=342, Invalid=990, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 16:08:13,042 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 167 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:13,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 17 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 16:08:13,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-16 16:08:13,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 52. [2022-11-16 16:08:13,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 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) [2022-11-16 16:08:13,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 75 transitions. [2022-11-16 16:08:13,066 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 75 transitions. Word has length 11 [2022-11-16 16:08:13,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:13,067 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 75 transitions. [2022-11-16 16:08:13,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:08:13,067 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 75 transitions. [2022-11-16 16:08:13,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:08:13,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:13,068 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:13,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 16:08:13,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 16:08:13,274 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:08:13,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:13,274 INFO L85 PathProgramCache]: Analyzing trace with hash 96484054, now seen corresponding path program 2 times [2022-11-16 16:08:13,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:13,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223807758] [2022-11-16 16:08:13,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:13,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:08:13,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:13,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223807758] [2022-11-16 16:08:13,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223807758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:08:13,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181696344] [2022-11-16 16:08:13,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:08:13,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:13,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:08:13,351 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:08:13,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 16:08:13,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:08:13,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:08:13,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:08:13,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:08:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:08:13,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:08:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:08:13,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181696344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:08:13,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1852281362] [2022-11-16 16:08:13,482 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:08:13,482 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:08:13,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:08:13,483 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:08:13,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:08:13,594 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:08:13,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1324#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:08:13,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:08:13,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:08:13,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-16 16:08:13,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242989242] [2022-11-16 16:08:13,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:08:13,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:08:13,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:13,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:08:13,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:08:13,682 INFO L87 Difference]: Start difference. First operand 52 states and 75 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:08:13,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:13,747 INFO L93 Difference]: Finished difference Result 58 states and 82 transitions. [2022-11-16 16:08:13,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:08:13,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:08:13,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:13,751 INFO L225 Difference]: With dead ends: 58 [2022-11-16 16:08:13,752 INFO L226 Difference]: Without dead ends: 48 [2022-11-16 16:08:13,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:08:13,754 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:13,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:08:13,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-16 16:08:13,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-16 16:08:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.5) internal successors, (69), 46 states have internal predecessors, (69), 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) [2022-11-16 16:08:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 69 transitions. [2022-11-16 16:08:13,786 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 69 transitions. Word has length 12 [2022-11-16 16:08:13,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:13,786 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 69 transitions. [2022-11-16 16:08:13,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:08:13,786 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 69 transitions. [2022-11-16 16:08:13,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:08:13,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:13,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:13,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 16:08:13,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:13,993 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:08:13,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:13,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1450502740, now seen corresponding path program 3 times [2022-11-16 16:08:13,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:13,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272939958] [2022-11-16 16:08:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:13,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:08:14,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:14,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272939958] [2022-11-16 16:08:14,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272939958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:08:14,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506072934] [2022-11-16 16:08:14,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:08:14,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:14,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:08:14,090 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:08:14,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 16:08:14,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:08:14,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:08:14,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:08:14,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:08:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:08:14,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:08:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:08:14,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506072934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:08:14,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1874900681] [2022-11-16 16:08:14,284 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:08:14,284 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:08:14,284 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:08:14,284 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:08:14,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:08:14,381 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:08:14,553 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1613#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:08:14,553 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:08:14,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:08:14,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-16 16:08:14,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476496647] [2022-11-16 16:08:14,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:08:14,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 16:08:14,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:14,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 16:08:14,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-11-16 16:08:14,555 INFO L87 Difference]: Start difference. First operand 47 states and 69 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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) [2022-11-16 16:08:14,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:14,754 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2022-11-16 16:08:14,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 16:08:14,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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 13 [2022-11-16 16:08:14,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:14,756 INFO L225 Difference]: With dead ends: 76 [2022-11-16 16:08:14,756 INFO L226 Difference]: Without dead ends: 61 [2022-11-16 16:08:14,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-11-16 16:08:14,757 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:14,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 30 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:08:14,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-16 16:08:14,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2022-11-16 16:08:14,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 44 states have internal predecessors, (65), 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) [2022-11-16 16:08:14,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 65 transitions. [2022-11-16 16:08:14,777 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 65 transitions. Word has length 13 [2022-11-16 16:08:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:14,777 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 65 transitions. [2022-11-16 16:08:14,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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) [2022-11-16 16:08:14,778 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 65 transitions. [2022-11-16 16:08:14,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:08:14,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:14,780 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:14,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 16:08:14,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:14,985 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:08:14,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:14,986 INFO L85 PathProgramCache]: Analyzing trace with hash 948168796, now seen corresponding path program 2 times [2022-11-16 16:08:14,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:14,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244221817] [2022-11-16 16:08:14,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:14,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:08:15,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:15,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244221817] [2022-11-16 16:08:15,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244221817] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:08:15,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545814071] [2022-11-16 16:08:15,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:08:15,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:15,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:08:15,127 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:08:15,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 16:08:15,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:08:15,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:08:15,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:08:15,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:08:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:08:15,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:08:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:08:15,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545814071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:08:15,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1070848683] [2022-11-16 16:08:15,281 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:08:15,281 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:08:15,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:08:15,282 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:08:15,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:08:15,386 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:08:15,516 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1929#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:08:15,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:08:15,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:08:15,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-11-16 16:08:15,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994565221] [2022-11-16 16:08:15,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:08:15,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 16:08:15,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:15,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 16:08:15,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-16 16:08:15,518 INFO L87 Difference]: Start difference. First operand 45 states and 65 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:08:15,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:15,629 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2022-11-16 16:08:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:08:15,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:08:15,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:15,630 INFO L225 Difference]: With dead ends: 63 [2022-11-16 16:08:15,630 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 16:08:15,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-16 16:08:15,631 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:15,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 15 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:08:15,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 16:08:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-11-16 16:08:15,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.456140350877193) internal successors, (83), 57 states have internal predecessors, (83), 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) [2022-11-16 16:08:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 83 transitions. [2022-11-16 16:08:15,655 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 83 transitions. Word has length 13 [2022-11-16 16:08:15,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:15,656 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 83 transitions. [2022-11-16 16:08:15,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:08:15,656 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 83 transitions. [2022-11-16 16:08:15,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:08:15,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:15,657 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:15,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 16:08:15,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:15,862 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:08:15,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:15,863 INFO L85 PathProgramCache]: Analyzing trace with hash 635711836, now seen corresponding path program 4 times [2022-11-16 16:08:15,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:15,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419306018] [2022-11-16 16:08:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:15,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:16,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:16,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419306018] [2022-11-16 16:08:16,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419306018] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:08:16,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344111700] [2022-11-16 16:08:16,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:08:16,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:16,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:08:16,367 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:08:16,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 16:08:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:16,452 WARN L261 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 16:08:16,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:08:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:16,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:08:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:18,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344111700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:08:18,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [949648957] [2022-11-16 16:08:18,027 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:08:18,027 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:08:18,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:08:18,028 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:08:18,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:08:18,141 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:08:18,413 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2278#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:08:18,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:08:18,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:08:18,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 28 [2022-11-16 16:08:18,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766128641] [2022-11-16 16:08:18,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:08:18,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 16:08:18,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:18,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 16:08:18,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 16:08:18,416 INFO L87 Difference]: Start difference. First operand 58 states and 83 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 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) [2022-11-16 16:08:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:19,656 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2022-11-16 16:08:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 16:08:19,657 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 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 15 [2022-11-16 16:08:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:19,658 INFO L225 Difference]: With dead ends: 74 [2022-11-16 16:08:19,658 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 16:08:19,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 16:08:19,660 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:19,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 27 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 16:08:19,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 16:08:19,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-11-16 16:08:19,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 states have internal predecessors, (83), 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) [2022-11-16 16:08:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 83 transitions. [2022-11-16 16:08:19,690 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 83 transitions. Word has length 15 [2022-11-16 16:08:19,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:19,691 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 83 transitions. [2022-11-16 16:08:19,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 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) [2022-11-16 16:08:19,691 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 83 transitions. [2022-11-16 16:08:19,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:08:19,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:19,692 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:19,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 16:08:19,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:19,903 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:08:19,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:19,904 INFO L85 PathProgramCache]: Analyzing trace with hash 120738986, now seen corresponding path program 5 times [2022-11-16 16:08:19,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:19,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403316488] [2022-11-16 16:08:19,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:19,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:08:20,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:20,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403316488] [2022-11-16 16:08:20,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403316488] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:08:20,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556501781] [2022-11-16 16:08:20,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:08:20,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:20,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:08:20,084 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:08:20,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 16:08:20,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 16:08:20,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:08:20,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:08:20,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:08:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:08:20,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:08:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:08:20,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556501781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:08:20,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [8607967] [2022-11-16 16:08:20,389 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:08:20,389 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:08:20,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:08:20,390 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:08:20,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:08:20,477 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:08:20,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2652#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:08:20,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:08:20,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:08:20,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 16:08:20,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644918101] [2022-11-16 16:08:20,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:08:20,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 16:08:20,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:20,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 16:08:20,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-11-16 16:08:20,648 INFO L87 Difference]: Start difference. First operand 60 states and 83 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 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) [2022-11-16 16:08:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:24,839 INFO L93 Difference]: Finished difference Result 157 states and 237 transitions. [2022-11-16 16:08:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-16 16:08:24,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 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 15 [2022-11-16 16:08:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:24,841 INFO L225 Difference]: With dead ends: 157 [2022-11-16 16:08:24,841 INFO L226 Difference]: Without dead ends: 137 [2022-11-16 16:08:24,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1165, Invalid=3665, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 16:08:24,844 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 235 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:24,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 39 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 16:08:24,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-16 16:08:24,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 77. [2022-11-16 16:08:24,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.4078947368421053) internal successors, (107), 76 states have internal predecessors, (107), 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) [2022-11-16 16:08:24,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 107 transitions. [2022-11-16 16:08:24,903 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 107 transitions. Word has length 15 [2022-11-16 16:08:24,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:24,903 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 107 transitions. [2022-11-16 16:08:24,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 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) [2022-11-16 16:08:24,904 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 107 transitions. [2022-11-16 16:08:24,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 16:08:24,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:24,908 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:24,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 16:08:25,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:25,113 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:08:25,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:25,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1768439388, now seen corresponding path program 6 times [2022-11-16 16:08:25,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:25,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493300362] [2022-11-16 16:08:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:25,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:08:25,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:25,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493300362] [2022-11-16 16:08:25,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493300362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:08:25,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43713507] [2022-11-16 16:08:25,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:08:25,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:25,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:08:25,243 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:08:25,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 16:08:25,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:08:25,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:08:25,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:08:25,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:08:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:08:25,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:08:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:08:25,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43713507] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:08:25,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1769524428] [2022-11-16 16:08:25,360 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:08:25,361 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:08:25,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:08:25,362 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:08:25,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:08:25,452 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:08:25,550 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3295#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:08:25,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:08:25,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:08:25,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-16 16:08:25,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731978313] [2022-11-16 16:08:25,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:08:25,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:08:25,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:25,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:08:25,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-16 16:08:25,555 INFO L87 Difference]: Start difference. First operand 77 states and 107 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2022-11-16 16:08:25,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:25,670 INFO L93 Difference]: Finished difference Result 84 states and 115 transitions. [2022-11-16 16:08:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:08:25,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 16 [2022-11-16 16:08:25,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:25,672 INFO L225 Difference]: With dead ends: 84 [2022-11-16 16:08:25,672 INFO L226 Difference]: Without dead ends: 71 [2022-11-16 16:08:25,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-16 16:08:25,679 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:25,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 17 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:08:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-16 16:08:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-11-16 16:08:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.4411764705882353) internal successors, (98), 68 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) [2022-11-16 16:08:25,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 98 transitions. [2022-11-16 16:08:25,738 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 98 transitions. Word has length 16 [2022-11-16 16:08:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:25,738 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 98 transitions. [2022-11-16 16:08:25,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2022-11-16 16:08:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 98 transitions. [2022-11-16 16:08:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 16:08:25,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:25,740 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:25,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 16:08:25,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 16:08:25,946 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:08:25,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:25,946 INFO L85 PathProgramCache]: Analyzing trace with hash 886270358, now seen corresponding path program 3 times [2022-11-16 16:08:25,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:25,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291638982] [2022-11-16 16:08:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:25,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:08:26,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:26,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291638982] [2022-11-16 16:08:26,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291638982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:08:26,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193787582] [2022-11-16 16:08:26,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:08:26,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:26,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:08:26,142 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:08:26,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 16:08:26,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:08:26,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:08:26,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:08:26,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:08:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:08:26,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:08:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:08:26,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193787582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:08:26,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1305619689] [2022-11-16 16:08:26,327 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:08:26,329 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:08:26,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:08:26,330 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:08:26,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:08:26,417 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:08:26,541 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3696#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:08:26,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:08:26,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:08:26,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2022-11-16 16:08:26,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988759693] [2022-11-16 16:08:26,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:08:26,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 16:08:26,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:26,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 16:08:26,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-16 16:08:26,543 INFO L87 Difference]: Start difference. First operand 69 states and 98 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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) [2022-11-16 16:08:26,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:26,742 INFO L93 Difference]: Finished difference Result 92 states and 133 transitions. [2022-11-16 16:08:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 16:08:26,742 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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 16 [2022-11-16 16:08:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:26,743 INFO L225 Difference]: With dead ends: 92 [2022-11-16 16:08:26,743 INFO L226 Difference]: Without dead ends: 89 [2022-11-16 16:08:26,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-16 16:08:26,744 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:26,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 34 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:08:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-16 16:08:26,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2022-11-16 16:08:26,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.4352941176470588) internal successors, (122), 85 states have internal predecessors, (122), 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) [2022-11-16 16:08:26,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 122 transitions. [2022-11-16 16:08:26,805 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 122 transitions. Word has length 16 [2022-11-16 16:08:26,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:26,805 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 122 transitions. [2022-11-16 16:08:26,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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) [2022-11-16 16:08:26,805 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 122 transitions. [2022-11-16 16:08:26,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 16:08:26,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:26,806 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:26,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 16:08:27,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 16:08:27,012 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:08:27,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:27,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1153590296, now seen corresponding path program 7 times [2022-11-16 16:08:27,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:27,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471146749] [2022-11-16 16:08:27,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:27,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 16:08:27,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:27,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471146749] [2022-11-16 16:08:27,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471146749] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:08:27,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006836920] [2022-11-16 16:08:27,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:08:27,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:27,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:08:27,169 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:08:27,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 16:08:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:27,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:08:27,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:08:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 16:08:27,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:08:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 16:08:27,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006836920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:08:27,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1980603483] [2022-11-16 16:08:27,450 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:08:27,450 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:08:27,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:08:27,451 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:08:27,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:08:27,528 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:08:27,699 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4160#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:08:27,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:08:27,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:08:27,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-11-16 16:08:27,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55851892] [2022-11-16 16:08:27,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:08:27,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 16:08:27,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:27,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 16:08:27,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-11-16 16:08:27,701 INFO L87 Difference]: Start difference. First operand 86 states and 122 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 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) [2022-11-16 16:08:28,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:28,182 INFO L93 Difference]: Finished difference Result 132 states and 176 transitions. [2022-11-16 16:08:28,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 16:08:28,183 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 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) Word has length 17 [2022-11-16 16:08:28,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:28,184 INFO L225 Difference]: With dead ends: 132 [2022-11-16 16:08:28,184 INFO L226 Difference]: Without dead ends: 116 [2022-11-16 16:08:28,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-11-16 16:08:28,186 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:28,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 48 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:08:28,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-16 16:08:28,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 83. [2022-11-16 16:08:28,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 82 states have internal predecessors, (116), 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) [2022-11-16 16:08:28,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 116 transitions. [2022-11-16 16:08:28,226 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 116 transitions. Word has length 17 [2022-11-16 16:08:28,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:28,227 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 116 transitions. [2022-11-16 16:08:28,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 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) [2022-11-16 16:08:28,227 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 116 transitions. [2022-11-16 16:08:28,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 16:08:28,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:28,228 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:28,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-16 16:08:28,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:28,429 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:08:28,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:28,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2083137721, now seen corresponding path program 3 times [2022-11-16 16:08:28,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:28,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925836939] [2022-11-16 16:08:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:28,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:28,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:28,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925836939] [2022-11-16 16:08:28,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925836939] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:08:28,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109366249] [2022-11-16 16:08:28,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:08:28,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:08:28,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:08:28,701 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:08:28,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 16:08:28,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:08:28,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:08:28,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 16:08:28,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:08:28,842 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:28,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:08:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:29,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109366249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:08:29,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1502427236] [2022-11-16 16:08:29,261 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:08:29,262 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:08:29,262 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:08:29,262 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:08:29,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:08:29,317 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:08:29,697 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4718#(and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:08:29,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:08:29,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:08:29,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2022-11-16 16:08:29,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602010073] [2022-11-16 16:08:29,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:08:29,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 16:08:29,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:29,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 16:08:29,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 16:08:29,700 INFO L87 Difference]: Start difference. First operand 83 states and 116 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 28 states have internal predecessors, (34), 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) [2022-11-16 16:09:04,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:09:04,077 INFO L93 Difference]: Finished difference Result 361 states and 558 transitions. [2022-11-16 16:09:04,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-16 16:09:04,078 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 16:09:04,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:09:04,079 INFO L225 Difference]: With dead ends: 361 [2022-11-16 16:09:04,080 INFO L226 Difference]: Without dead ends: 328 [2022-11-16 16:09:04,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=1658, Invalid=4194, Unknown=0, NotChecked=0, Total=5852 [2022-11-16 16:09:04,082 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 622 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 16:09:04,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 45 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-16 16:09:04,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-16 16:09:04,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 127. [2022-11-16 16:09:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.4126984126984128) internal successors, (178), 126 states have internal predecessors, (178), 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) [2022-11-16 16:09:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 178 transitions. [2022-11-16 16:09:04,140 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 178 transitions. Word has length 18 [2022-11-16 16:09:04,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:09:04,141 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 178 transitions. [2022-11-16 16:09:04,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 28 states have internal predecessors, (34), 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) [2022-11-16 16:09:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 178 transitions. [2022-11-16 16:09:04,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 16:09:04,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:09:04,142 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:09:04,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 16:09:04,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 16:09:04,348 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:09:04,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:09:04,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1051131434, now seen corresponding path program 8 times [2022-11-16 16:09:04,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:09:04,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256449979] [2022-11-16 16:09:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:09:04,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:09:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:09:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:09:04,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:09:04,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256449979] [2022-11-16 16:09:04,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256449979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:09:04,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942749126] [2022-11-16 16:09:04,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:09:04,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:09:04,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:09:04,831 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:09:04,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 16:09:05,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 16:09:05,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:09:05,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-16 16:09:05,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:09:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:09:05,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:09:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:09:07,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942749126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:09:07,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1288307795] [2022-11-16 16:09:07,196 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:09:07,196 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:09:07,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:09:07,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:09:07,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:09:07,281 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:09:07,676 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5922#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:09:07,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:09:07,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:09:07,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 42 [2022-11-16 16:09:07,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323324724] [2022-11-16 16:09:07,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:09:07,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 16:09:07,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:09:07,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 16:09:07,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 16:09:07,678 INFO L87 Difference]: Start difference. First operand 127 states and 178 transitions. Second operand has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:12,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:09:12,247 INFO L93 Difference]: Finished difference Result 151 states and 207 transitions. [2022-11-16 16:09:12,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 16:09:12,247 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 16:09:12,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:09:12,248 INFO L225 Difference]: With dead ends: 151 [2022-11-16 16:09:12,249 INFO L226 Difference]: Without dead ends: 139 [2022-11-16 16:09:12,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=603, Invalid=4227, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 16:09:12,251 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 94 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:09:12,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 42 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 16:09:12,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-16 16:09:12,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 133. [2022-11-16 16:09:12,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.378787878787879) internal successors, (182), 132 states have internal predecessors, (182), 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) [2022-11-16 16:09:12,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 182 transitions. [2022-11-16 16:09:12,319 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 182 transitions. Word has length 19 [2022-11-16 16:09:12,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:09:12,319 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 182 transitions. [2022-11-16 16:09:12,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:12,319 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 182 transitions. [2022-11-16 16:09:12,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 16:09:12,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:09:12,320 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:09:12,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 16:09:12,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 16:09:12,521 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:09:12,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:09:12,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1183765916, now seen corresponding path program 4 times [2022-11-16 16:09:12,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:09:12,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389678841] [2022-11-16 16:09:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:09:12,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:09:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:09:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 16:09:12,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:09:12,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389678841] [2022-11-16 16:09:12,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389678841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:09:12,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421961172] [2022-11-16 16:09:12,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:09:12,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:09:12,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:09:12,736 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:09:12,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 16:09:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:09:12,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:09:12,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:09:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 16:09:12,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:09:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 16:09:12,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421961172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:09:12,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1464964352] [2022-11-16 16:09:12,943 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:09:12,943 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:09:12,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:09:12,943 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:09:12,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:09:13,031 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:09:13,194 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6649#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:09:13,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:09:13,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:09:13,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 14 [2022-11-16 16:09:13,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943571462] [2022-11-16 16:09:13,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:09:13,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 16:09:13,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:09:13,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 16:09:13,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-16 16:09:13,196 INFO L87 Difference]: Start difference. First operand 133 states and 182 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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) [2022-11-16 16:09:13,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:09:13,499 INFO L93 Difference]: Finished difference Result 171 states and 238 transitions. [2022-11-16 16:09:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 16:09:13,499 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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 19 [2022-11-16 16:09:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:09:13,501 INFO L225 Difference]: With dead ends: 171 [2022-11-16 16:09:13,501 INFO L226 Difference]: Without dead ends: 168 [2022-11-16 16:09:13,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-16 16:09:13,502 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:09:13,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 39 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:09:13,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-16 16:09:13,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 157. [2022-11-16 16:09:13,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.391025641025641) internal successors, (217), 156 states have internal predecessors, (217), 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) [2022-11-16 16:09:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 217 transitions. [2022-11-16 16:09:13,601 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 217 transitions. Word has length 19 [2022-11-16 16:09:13,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:09:13,604 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 217 transitions. [2022-11-16 16:09:13,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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) [2022-11-16 16:09:13,604 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 217 transitions. [2022-11-16 16:09:13,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 16:09:13,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:09:13,609 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:09:13,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 16:09:13,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:09:13,814 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:09:13,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:09:13,815 INFO L85 PathProgramCache]: Analyzing trace with hash -379631660, now seen corresponding path program 5 times [2022-11-16 16:09:13,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:09:13,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788464909] [2022-11-16 16:09:13,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:09:13,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:09:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:09:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 16:09:14,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:09:14,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788464909] [2022-11-16 16:09:14,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788464909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:09:14,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864103916] [2022-11-16 16:09:14,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:09:14,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:09:14,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:09:14,018 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:09:14,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 16:09:14,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 16:09:14,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:09:14,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 16:09:14,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:09:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 16:09:14,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:09:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 16:09:14,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864103916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:09:14,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [100450312] [2022-11-16 16:09:14,729 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:09:14,729 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:09:14,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:09:14,730 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:09:14,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:09:14,810 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:09:14,992 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7440#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:09:14,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:09:14,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:09:14,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 27 [2022-11-16 16:09:14,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571203711] [2022-11-16 16:09:14,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:09:14,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 16:09:14,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:09:14,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 16:09:14,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2022-11-16 16:09:14,994 INFO L87 Difference]: Start difference. First operand 157 states and 217 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 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) [2022-11-16 16:09:16,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:09:16,327 INFO L93 Difference]: Finished difference Result 286 states and 362 transitions. [2022-11-16 16:09:16,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 16:09:16,328 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 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 20 [2022-11-16 16:09:16,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:09:16,330 INFO L225 Difference]: With dead ends: 286 [2022-11-16 16:09:16,330 INFO L226 Difference]: Without dead ends: 267 [2022-11-16 16:09:16,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=507, Invalid=2145, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 16:09:16,331 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 195 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:09:16,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 48 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 16:09:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-16 16:09:16,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 171. [2022-11-16 16:09:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.411764705882353) internal successors, (240), 170 states have internal predecessors, (240), 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) [2022-11-16 16:09:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 240 transitions. [2022-11-16 16:09:16,429 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 240 transitions. Word has length 20 [2022-11-16 16:09:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:09:16,429 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 240 transitions. [2022-11-16 16:09:16,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 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) [2022-11-16 16:09:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 240 transitions. [2022-11-16 16:09:16,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 16:09:16,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:09:16,431 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:09:16,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 16:09:16,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:09:16,631 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:09:16,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:09:16,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2083472682, now seen corresponding path program 6 times [2022-11-16 16:09:16,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:09:16,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115188017] [2022-11-16 16:09:16,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:09:16,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:09:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:09:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:09:16,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:09:16,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115188017] [2022-11-16 16:09:16,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115188017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:09:16,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645470384] [2022-11-16 16:09:16,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:09:16,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:09:16,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:09:16,919 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:09:16,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 16:09:16,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:09:16,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:09:16,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:09:16,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:09:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:09:17,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:09:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:09:17,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645470384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:09:17,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [326224973] [2022-11-16 16:09:17,163 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:09:17,164 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:09:17,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:09:17,164 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:09:17,164 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:09:17,241 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:09:17,381 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8532#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:09:17,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:09:17,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:09:17,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 17 [2022-11-16 16:09:17,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147104464] [2022-11-16 16:09:17,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:09:17,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 16:09:17,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:09:17,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 16:09:17,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-11-16 16:09:17,383 INFO L87 Difference]: Start difference. First operand 171 states and 240 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:09:17,828 INFO L93 Difference]: Finished difference Result 216 states and 308 transitions. [2022-11-16 16:09:17,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 16:09:17,831 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-16 16:09:17,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:09:17,833 INFO L225 Difference]: With dead ends: 216 [2022-11-16 16:09:17,833 INFO L226 Difference]: Without dead ends: 213 [2022-11-16 16:09:17,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-11-16 16:09:17,834 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:09:17,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 64 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 16:09:17,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-16 16:09:17,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 199. [2022-11-16 16:09:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.4242424242424243) internal successors, (282), 198 states have internal predecessors, (282), 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) [2022-11-16 16:09:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 282 transitions. [2022-11-16 16:09:17,955 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 282 transitions. Word has length 22 [2022-11-16 16:09:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:09:17,955 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 282 transitions. [2022-11-16 16:09:17,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:17,956 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 282 transitions. [2022-11-16 16:09:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 16:09:17,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:09:17,957 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:09:17,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 16:09:18,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 16:09:18,162 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:09:18,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:09:18,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1825781611, now seen corresponding path program 9 times [2022-11-16 16:09:18,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:09:18,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620902942] [2022-11-16 16:09:18,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:09:18,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:09:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:09:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:09:18,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:09:18,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620902942] [2022-11-16 16:09:18,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620902942] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:09:18,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680972346] [2022-11-16 16:09:18,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:09:18,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:09:18,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:09:18,470 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:09:18,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 16:09:18,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:09:18,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:09:18,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 16:09:18,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:09:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:09:18,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:09:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:09:19,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680972346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:09:19,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2076503665] [2022-11-16 16:09:19,072 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:09:19,072 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:09:19,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:09:19,072 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:09:19,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:09:19,160 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:09:19,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9515#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:09:19,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:09:19,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:09:19,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2022-11-16 16:09:19,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557472584] [2022-11-16 16:09:19,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:09:19,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 16:09:19,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:09:19,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 16:09:19,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1115, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 16:09:19,417 INFO L87 Difference]: Start difference. First operand 199 states and 282 transitions. Second operand has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 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) [2022-11-16 16:09:32,583 WARN L233 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:09:43,373 WARN L233 SmtUtils]: Spent 7.90s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:11:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:11:34,427 INFO L93 Difference]: Finished difference Result 638 states and 989 transitions. [2022-11-16 16:11:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-11-16 16:11:34,431 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 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 22 [2022-11-16 16:11:34,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:11:34,433 INFO L225 Difference]: With dead ends: 638 [2022-11-16 16:11:34,433 INFO L226 Difference]: Without dead ends: 606 [2022-11-16 16:11:34,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7744 ImplicationChecksByTransitivity, 130.7s TimeCoverageRelationStatistics Valid=5332, Invalid=15259, Unknown=1, NotChecked=0, Total=20592 [2022-11-16 16:11:34,438 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1054 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:11:34,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1054 Valid, 46 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-16 16:11:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-11-16 16:11:34,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 228. [2022-11-16 16:11:34,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.4361233480176212) internal successors, (326), 227 states have internal predecessors, (326), 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) [2022-11-16 16:11:34,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 326 transitions. [2022-11-16 16:11:34,588 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 326 transitions. Word has length 22 [2022-11-16 16:11:34,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:11:34,588 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 326 transitions. [2022-11-16 16:11:34,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 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) [2022-11-16 16:11:34,589 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 326 transitions. [2022-11-16 16:11:34,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 16:11:34,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:11:34,590 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:11:34,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 16:11:34,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:11:34,795 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:11:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:11:34,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1151895452, now seen corresponding path program 10 times [2022-11-16 16:11:34,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:11:34,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273675341] [2022-11-16 16:11:34,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:11:34,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:11:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:11:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:11:35,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:11:35,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273675341] [2022-11-16 16:11:35,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273675341] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:11:35,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067978120] [2022-11-16 16:11:35,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:11:35,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:11:35,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:11:35,503 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:11:35,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 16:11:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:11:35,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-16 16:11:35,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:11:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:11:36,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:11:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:11:38,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067978120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:11:38,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [945532259] [2022-11-16 16:11:38,246 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:11:38,246 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:11:38,246 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:11:38,247 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:11:38,247 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:11:38,325 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:11:38,697 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11633#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:11:38,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:11:38,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:11:38,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 53 [2022-11-16 16:11:38,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19527500] [2022-11-16 16:11:38,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:11:38,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-16 16:11:38,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:11:38,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-16 16:11:38,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=3032, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 16:11:38,701 INFO L87 Difference]: Start difference. First operand 228 states and 326 transitions. Second operand has 54 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 53 states have internal predecessors, (65), 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) [2022-11-16 16:11:44,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:11:44,652 INFO L93 Difference]: Finished difference Result 253 states and 354 transitions. [2022-11-16 16:11:44,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 16:11:44,652 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 53 states have internal predecessors, (65), 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 23 [2022-11-16 16:11:44,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:11:44,654 INFO L225 Difference]: With dead ends: 253 [2022-11-16 16:11:44,654 INFO L226 Difference]: Without dead ends: 233 [2022-11-16 16:11:44,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=893, Invalid=6079, Unknown=0, NotChecked=0, Total=6972 [2022-11-16 16:11:44,656 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 133 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:11:44,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 58 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-16 16:11:44,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-16 16:11:44,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 227. [2022-11-16 16:11:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.4380530973451326) internal successors, (325), 226 states have internal predecessors, (325), 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) [2022-11-16 16:11:44,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 325 transitions. [2022-11-16 16:11:44,803 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 325 transitions. Word has length 23 [2022-11-16 16:11:44,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:11:44,803 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 325 transitions. [2022-11-16 16:11:44,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 53 states have internal predecessors, (65), 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) [2022-11-16 16:11:44,804 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 325 transitions. [2022-11-16 16:11:44,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 16:11:44,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:11:44,805 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:11:44,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 16:11:45,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 16:11:45,011 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:11:45,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:11:45,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1725724456, now seen corresponding path program 7 times [2022-11-16 16:11:45,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:11:45,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527123674] [2022-11-16 16:11:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:11:45,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:11:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:11:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:11:45,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:11:45,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527123674] [2022-11-16 16:11:45,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527123674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:11:45,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135521076] [2022-11-16 16:11:45,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:11:45,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:11:45,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:11:45,295 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:11:45,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 16:11:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:11:45,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 16:11:45,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:11:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:11:45,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:11:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:11:46,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135521076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:11:46,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1521265881] [2022-11-16 16:11:46,008 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:11:46,011 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:11:46,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:11:46,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:11:46,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:11:46,103 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:11:46,337 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12800#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:11:46,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:11:46,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:11:46,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 32 [2022-11-16 16:11:46,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792770054] [2022-11-16 16:11:46,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:11:46,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 16:11:46,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:11:46,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 16:11:46,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 16:11:46,340 INFO L87 Difference]: Start difference. First operand 227 states and 325 transitions. Second operand has 32 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 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) [2022-11-16 16:11:48,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:11:48,838 INFO L93 Difference]: Finished difference Result 415 states and 523 transitions. [2022-11-16 16:11:48,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-16 16:11:48,839 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 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 23 [2022-11-16 16:11:48,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:11:48,841 INFO L225 Difference]: With dead ends: 415 [2022-11-16 16:11:48,841 INFO L226 Difference]: Without dead ends: 389 [2022-11-16 16:11:48,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=778, Invalid=3254, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 16:11:48,842 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 222 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 16:11:48,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 44 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 16:11:48,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-11-16 16:11:49,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 235. [2022-11-16 16:11:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.4316239316239316) internal successors, (335), 234 states have internal predecessors, (335), 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) [2022-11-16 16:11:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 335 transitions. [2022-11-16 16:11:49,007 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 335 transitions. Word has length 23 [2022-11-16 16:11:49,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:11:49,007 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 335 transitions. [2022-11-16 16:11:49,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 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) [2022-11-16 16:11:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 335 transitions. [2022-11-16 16:11:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 16:11:49,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:11:49,008 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:11:49,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 16:11:49,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:11:49,210 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:11:49,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:11:49,210 INFO L85 PathProgramCache]: Analyzing trace with hash -613469290, now seen corresponding path program 11 times [2022-11-16 16:11:49,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:11:49,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865575693] [2022-11-16 16:11:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:11:49,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:11:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:11:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 16:11:49,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:11:49,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865575693] [2022-11-16 16:11:49,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865575693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:11:49,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276136862] [2022-11-16 16:11:49,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:11:49,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:11:49,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:11:49,333 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:11:49,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 16:11:49,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 16:11:49,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:11:49,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 16:11:49,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:11:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 16:11:49,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:11:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 16:11:49,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276136862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:11:49,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [414397095] [2022-11-16 16:11:49,949 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:11:49,950 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:11:49,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:11:49,950 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:11:49,950 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:11:50,058 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:11:50,237 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14308#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:11:50,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:11:50,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:11:50,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 20 [2022-11-16 16:11:50,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944618697] [2022-11-16 16:11:50,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:11:50,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 16:11:50,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:11:50,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 16:11:50,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-11-16 16:11:50,239 INFO L87 Difference]: Start difference. First operand 235 states and 335 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:11:57,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:11:57,635 INFO L93 Difference]: Finished difference Result 522 states and 777 transitions. [2022-11-16 16:11:57,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-16 16:11:57,635 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-16 16:11:57,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:11:57,637 INFO L225 Difference]: With dead ends: 522 [2022-11-16 16:11:57,638 INFO L226 Difference]: Without dead ends: 502 [2022-11-16 16:11:57,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=967, Invalid=3589, Unknown=0, NotChecked=0, Total=4556 [2022-11-16 16:11:57,639 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 135 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:11:57,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 70 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 16:11:57,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-11-16 16:11:58,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 499. [2022-11-16 16:11:58,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.4859437751004017) internal successors, (740), 498 states have internal predecessors, (740), 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) [2022-11-16 16:11:58,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 740 transitions. [2022-11-16 16:11:58,010 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 740 transitions. Word has length 24 [2022-11-16 16:11:58,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:11:58,011 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 740 transitions. [2022-11-16 16:11:58,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:11:58,011 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 740 transitions. [2022-11-16 16:11:58,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 16:11:58,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:11:58,012 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:11:58,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 16:11:58,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 16:11:58,218 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:11:58,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:11:58,218 INFO L85 PathProgramCache]: Analyzing trace with hash 724211372, now seen corresponding path program 12 times [2022-11-16 16:11:58,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:11:58,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363621570] [2022-11-16 16:11:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:11:58,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:11:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:11:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 16:11:58,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:11:58,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363621570] [2022-11-16 16:11:58,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363621570] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:11:58,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050525124] [2022-11-16 16:11:58,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:11:58,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:11:58,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:11:58,455 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:11:58,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 16:11:58,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:11:58,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:11:58,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 16:11:58,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:11:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 16:11:58,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:11:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 16:11:58,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050525124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:11:58,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1096764463] [2022-11-16 16:11:58,914 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:11:58,914 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:11:58,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:11:58,914 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:11:58,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:11:58,989 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:11:59,189 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16599#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:11:59,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:11:59,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:11:59,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 25 [2022-11-16 16:11:59,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593718374] [2022-11-16 16:11:59,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:11:59,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 16:11:59,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:11:59,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 16:11:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-11-16 16:11:59,192 INFO L87 Difference]: Start difference. First operand 499 states and 740 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 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) [2022-11-16 16:12:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:01,235 INFO L93 Difference]: Finished difference Result 757 states and 1052 transitions. [2022-11-16 16:12:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 16:12:01,236 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 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 25 [2022-11-16 16:12:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:01,239 INFO L225 Difference]: With dead ends: 757 [2022-11-16 16:12:01,239 INFO L226 Difference]: Without dead ends: 674 [2022-11-16 16:12:01,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=275, Invalid=1981, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 16:12:01,240 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 50 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:01,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 75 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 16:12:01,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-16 16:12:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 481. [2022-11-16 16:12:01,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.4729166666666667) internal successors, (707), 480 states have internal predecessors, (707), 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) [2022-11-16 16:12:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 707 transitions. [2022-11-16 16:12:01,611 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 707 transitions. Word has length 25 [2022-11-16 16:12:01,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:01,611 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 707 transitions. [2022-11-16 16:12:01,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 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) [2022-11-16 16:12:01,611 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 707 transitions. [2022-11-16 16:12:01,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 16:12:01,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:01,613 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:12:01,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:01,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 16:12:01,818 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:12:01,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:01,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1859162844, now seen corresponding path program 8 times [2022-11-16 16:12:01,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:12:01,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918107206] [2022-11-16 16:12:01,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:01,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:12:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 16:12:02,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:12:02,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918107206] [2022-11-16 16:12:02,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918107206] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:12:02,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605503055] [2022-11-16 16:12:02,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:12:02,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:12:02,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:12:02,238 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:12:02,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 16:12:02,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 16:12:02,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:12:02,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-16 16:12:02,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:12:03,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-16 16:12:03,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605503055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:03,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [839138928] [2022-11-16 16:12:03,270 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:12:03,270 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:12:03,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:12:03,270 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:12:03,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:12:03,341 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:12:03,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19277#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:12:03,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:12:03,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:12:03,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 9] total 40 [2022-11-16 16:12:03,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030538569] [2022-11-16 16:12:03,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:12:03,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 16:12:03,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:12:03,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 16:12:03,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1585, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 16:12:03,634 INFO L87 Difference]: Start difference. First operand 481 states and 707 transitions. Second operand has 40 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 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) [2022-11-16 16:12:06,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:12:06,407 INFO L93 Difference]: Finished difference Result 605 states and 873 transitions. [2022-11-16 16:12:06,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-16 16:12:06,408 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 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 25 [2022-11-16 16:12:06,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:12:06,410 INFO L225 Difference]: With dead ends: 605 [2022-11-16 16:12:06,410 INFO L226 Difference]: Without dead ends: 522 [2022-11-16 16:12:06,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1027, Invalid=6113, Unknown=0, NotChecked=0, Total=7140 [2022-11-16 16:12:06,412 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 116 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 16:12:06,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 109 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 16:12:06,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-11-16 16:12:06,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 474. [2022-11-16 16:12:06,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 1.4608879492600422) internal successors, (691), 473 states have internal predecessors, (691), 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) [2022-11-16 16:12:06,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 691 transitions. [2022-11-16 16:12:06,773 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 691 transitions. Word has length 25 [2022-11-16 16:12:06,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:12:06,774 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 691 transitions. [2022-11-16 16:12:06,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 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) [2022-11-16 16:12:06,774 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 691 transitions. [2022-11-16 16:12:06,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 16:12:06,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:12:06,775 INFO L195 NwaCegarLoop]: trace histogram [13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:12:06,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 16:12:06,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:12:06,981 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:12:06,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:12:06,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1799152263, now seen corresponding path program 13 times [2022-11-16 16:12:06,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:12:06,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200776247] [2022-11-16 16:12:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:12:06,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:12:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:12:07,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:12:07,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200776247] [2022-11-16 16:12:07,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200776247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:12:07,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630945427] [2022-11-16 16:12:07,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:12:07,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:12:07,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:12:07,383 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:12:07,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 16:12:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:12:07,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 16:12:07,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:12:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:12:07,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:12:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:12:08,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630945427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:12:08,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [870190875] [2022-11-16 16:12:08,187 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:12:08,187 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:12:08,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:12:08,188 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:12:08,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:12:08,269 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:12:08,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21693#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:12:08,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:12:08,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:12:08,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2022-11-16 16:12:08,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475815374] [2022-11-16 16:12:08,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:12:08,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 16:12:08,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:12:08,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 16:12:08,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1387, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 16:12:08,528 INFO L87 Difference]: Start difference. First operand 474 states and 691 transitions. Second operand has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 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) [2022-11-16 16:12:18,802 WARN L233 SmtUtils]: Spent 5.35s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:12:33,708 WARN L233 SmtUtils]: Spent 8.89s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:12:58,083 WARN L233 SmtUtils]: Spent 6.72s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:13:09,532 WARN L233 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:13:31,396 WARN L233 SmtUtils]: Spent 5.46s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:13:40,647 WARN L233 SmtUtils]: Spent 5.84s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:14:57,679 WARN L233 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:15:10,992 WARN L233 SmtUtils]: Spent 7.05s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:17:22,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 16:17:22,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:17:22,581 INFO L93 Difference]: Finished difference Result 1723 states and 2563 transitions. [2022-11-16 16:17:22,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-11-16 16:17:22,583 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 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 [2022-11-16 16:17:22,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:17:22,589 INFO L225 Difference]: With dead ends: 1723 [2022-11-16 16:17:22,589 INFO L226 Difference]: Without dead ends: 1613 [2022-11-16 16:17:22,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15291 ImplicationChecksByTransitivity, 304.7s TimeCoverageRelationStatistics Valid=8954, Invalid=30046, Unknown=6, NotChecked=0, Total=39006 [2022-11-16 16:17:22,594 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1335 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-11-16 16:17:22,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1335 Valid, 62 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-11-16 16:17:22,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2022-11-16 16:17:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 544. [2022-11-16 16:17:23,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 1.4788213627992635) internal successors, (803), 543 states have internal predecessors, (803), 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) [2022-11-16 16:17:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 803 transitions. [2022-11-16 16:17:23,082 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 803 transitions. Word has length 26 [2022-11-16 16:17:23,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:17:23,082 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 803 transitions. [2022-11-16 16:17:23,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 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) [2022-11-16 16:17:23,083 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 803 transitions. [2022-11-16 16:17:23,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 16:17:23,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:17:23,084 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:17:23,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 16:17:23,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 16:17:23,284 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:17:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:17:23,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1551663722, now seen corresponding path program 14 times [2022-11-16 16:17:23,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:17:23,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223443604] [2022-11-16 16:17:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:17:23,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:17:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:17:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:17:24,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:17:24,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223443604] [2022-11-16 16:17:24,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223443604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:17:24,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394047205] [2022-11-16 16:17:24,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:17:24,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:17:24,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:17:24,091 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:17:24,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 16:17:25,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 16:17:25,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:17:25,357 WARN L261 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 16:17:25,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:17:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:17:26,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:17:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:17:28,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394047205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:17:28,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [796794745] [2022-11-16 16:17:28,864 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:17:28,864 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:17:28,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:17:28,864 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:17:28,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:17:28,954 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:17:29,408 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26745#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:17:29,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:17:29,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:17:29,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 24] total 64 [2022-11-16 16:17:29,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286108352] [2022-11-16 16:17:29,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:17:29,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-16 16:17:29,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:17:29,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-16 16:17:29,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=4298, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 16:17:29,410 INFO L87 Difference]: Start difference. First operand 544 states and 803 transitions. Second operand has 65 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 64 states have internal predecessors, (77), 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) [2022-11-16 16:17:35,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:17:35,186 INFO L93 Difference]: Finished difference Result 572 states and 833 transitions. [2022-11-16 16:17:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 16:17:35,187 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 64 states have internal predecessors, (77), 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 27 [2022-11-16 16:17:35,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:17:35,188 INFO L225 Difference]: With dead ends: 572 [2022-11-16 16:17:35,188 INFO L226 Difference]: Without dead ends: 546 [2022-11-16 16:17:35,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1127, Invalid=7063, Unknown=0, NotChecked=0, Total=8190 [2022-11-16 16:17:35,190 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 152 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:17:35,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 59 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-16 16:17:35,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-11-16 16:17:35,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 538. [2022-11-16 16:17:35,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.4823091247672253) internal successors, (796), 537 states have internal predecessors, (796), 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) [2022-11-16 16:17:35,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 796 transitions. [2022-11-16 16:17:35,845 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 796 transitions. Word has length 27 [2022-11-16 16:17:35,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:17:35,845 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 796 transitions. [2022-11-16 16:17:35,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 64 states have internal predecessors, (77), 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) [2022-11-16 16:17:35,846 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 796 transitions. [2022-11-16 16:17:35,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 16:17:35,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:17:35,847 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:17:35,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-16 16:17:36,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 16:17:36,049 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:17:36,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:17:36,049 INFO L85 PathProgramCache]: Analyzing trace with hash 847248406, now seen corresponding path program 9 times [2022-11-16 16:17:36,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:17:36,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012321711] [2022-11-16 16:17:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:17:36,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:17:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:17:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 16:17:36,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:17:36,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012321711] [2022-11-16 16:17:36,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012321711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:17:36,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483109364] [2022-11-16 16:17:36,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:17:36,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:17:36,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:17:36,507 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:17:36,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 16:17:36,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:17:36,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:17:36,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 16:17:36,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:17:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 16:17:36,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:17:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 16:17:36,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483109364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:17:36,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1523365629] [2022-11-16 16:17:36,890 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:17:36,891 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:17:36,891 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:17:36,891 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:17:36,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:17:36,981 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:17:37,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29185#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:17:37,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:17:37,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:17:37,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 23 [2022-11-16 16:17:37,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795994763] [2022-11-16 16:17:37,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:17:37,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 16:17:37,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:17:37,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 16:17:37,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-11-16 16:17:37,185 INFO L87 Difference]: Start difference. First operand 538 states and 796 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 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) [2022-11-16 16:17:38,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:17:38,496 INFO L93 Difference]: Finished difference Result 560 states and 831 transitions. [2022-11-16 16:17:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 16:17:38,496 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 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 28 [2022-11-16 16:17:38,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:17:38,498 INFO L225 Difference]: With dead ends: 560 [2022-11-16 16:17:38,498 INFO L226 Difference]: Without dead ends: 557 [2022-11-16 16:17:38,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-11-16 16:17:38,500 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 73 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:17:38,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 89 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 16:17:38,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-11-16 16:17:38,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 538. [2022-11-16 16:17:38,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.4767225325884543) internal successors, (793), 537 states have internal predecessors, (793), 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) [2022-11-16 16:17:38,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 793 transitions. [2022-11-16 16:17:38,995 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 793 transitions. Word has length 28 [2022-11-16 16:17:38,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:17:38,996 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 793 transitions. [2022-11-16 16:17:38,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 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) [2022-11-16 16:17:38,996 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 793 transitions. [2022-11-16 16:17:38,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 16:17:38,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:17:38,997 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:17:39,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 16:17:39,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:17:39,202 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:17:39,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:17:39,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1565559896, now seen corresponding path program 15 times [2022-11-16 16:17:39,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:17:39,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143110991] [2022-11-16 16:17:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:17:39,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:17:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:17:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-16 16:17:39,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:17:39,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143110991] [2022-11-16 16:17:39,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143110991] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:17:39,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701164855] [2022-11-16 16:17:39,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:17:39,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:17:39,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:17:39,485 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:17:39,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 16:17:39,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:17:39,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:17:39,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 16:17:39,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:17:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-16 16:17:39,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:17:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 16:17:39,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701164855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:17:39,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443181920] [2022-11-16 16:17:39,995 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:17:39,996 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:17:39,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:17:39,996 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:17:39,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:17:40,069 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:17:40,292 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31573#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:17:40,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:17:40,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:17:40,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 30 [2022-11-16 16:17:40,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677519560] [2022-11-16 16:17:40,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:17:40,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 16:17:40,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:17:40,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 16:17:40,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 16:17:40,294 INFO L87 Difference]: Start difference. First operand 538 states and 793 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:17:43,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:17:43,380 INFO L93 Difference]: Finished difference Result 797 states and 1100 transitions. [2022-11-16 16:17:43,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-16 16:17:43,381 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-16 16:17:43,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:17:43,384 INFO L225 Difference]: With dead ends: 797 [2022-11-16 16:17:43,384 INFO L226 Difference]: Without dead ends: 705 [2022-11-16 16:17:43,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=363, Invalid=2829, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 16:17:43,386 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 69 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:17:43,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 106 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 16:17:43,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-11-16 16:17:44,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 518. [2022-11-16 16:17:44,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 1.460348162475822) internal successors, (755), 517 states have internal predecessors, (755), 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) [2022-11-16 16:17:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 755 transitions. [2022-11-16 16:17:44,029 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 755 transitions. Word has length 29 [2022-11-16 16:17:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:17:44,029 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 755 transitions. [2022-11-16 16:17:44,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:17:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 755 transitions. [2022-11-16 16:17:44,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 16:17:44,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:17:44,031 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:17:44,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 16:17:44,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:17:44,237 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:17:44,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:17:44,237 INFO L85 PathProgramCache]: Analyzing trace with hash -660790827, now seen corresponding path program 16 times [2022-11-16 16:17:44,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:17:44,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468419131] [2022-11-16 16:17:44,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:17:44,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:17:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:17:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 16:17:44,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:17:44,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468419131] [2022-11-16 16:17:44,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468419131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:17:44,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236898273] [2022-11-16 16:17:44,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:17:44,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:17:44,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:17:44,744 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:17:44,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8e4c8c-de05-4a18-8173-ff6d3d09888c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 16:17:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:17:44,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-16 16:17:44,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:17:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 16:17:44,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:17:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 16:17:45,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236898273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:17:45,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1967262706] [2022-11-16 16:17:45,748 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:17:45,748 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:17:45,749 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:17:45,749 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:17:45,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:17:45,833 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:17:46,121 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34441#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (* 2 (mod |ULTIMATE.start_main_~n~0#1| 2147483648)) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:17:46,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:17:46,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:17:46,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2022-11-16 16:17:46,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197925873] [2022-11-16 16:17:46,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:17:46,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 16:17:46,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:17:46,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 16:17:46,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1687, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 16:17:46,124 INFO L87 Difference]: Start difference. First operand 518 states and 755 transitions. Second operand has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 40 states have internal predecessors, (48), 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) [2022-11-16 16:18:09,744 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:18:45,593 WARN L233 SmtUtils]: Spent 20.02s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:19:19,710 WARN L233 SmtUtils]: Spent 17.57s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:19:42,973 WARN L233 SmtUtils]: Spent 13.44s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:20:13,975 WARN L233 SmtUtils]: Spent 12.68s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:20:25,368 WARN L233 SmtUtils]: Spent 7.09s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:20:42,279 WARN L233 SmtUtils]: Spent 9.83s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:21:05,661 WARN L233 SmtUtils]: Spent 8.66s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:21:26,978 WARN L233 SmtUtils]: Spent 14.46s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:21:38,649 WARN L233 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:21:51,882 WARN L233 SmtUtils]: Spent 7.03s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:22:13,966 WARN L233 SmtUtils]: Spent 8.29s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:22:27,104 WARN L233 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:22:44,009 WARN L233 SmtUtils]: Spent 5.79s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)