./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de32.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de32.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS --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 be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 --- 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-8393723 [2022-11-19 07:17:21,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:17:21,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:17:21,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:17:21,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:17:21,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:17:21,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:17:21,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:17:21,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:17:21,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:17:21,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:17:21,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:17:21,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:17:21,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:17:21,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:17:21,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:17:21,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:17:21,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:17:21,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:17:21,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:17:21,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:17:21,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:17:21,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:17:21,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:17:21,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:17:21,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:17:21,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:17:21,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:17:21,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:17:21,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:17:21,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:17:21,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:17:21,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:17:21,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:17:21,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:17:21,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:17:21,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:17:21,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:17:21,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:17:21,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:17:21,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:17:21,144 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:17:21,170 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:17:21,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:17:21,171 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:17:21,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:17:21,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:17:21,172 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:17:21,172 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:17:21,172 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:17:21,173 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:17:21,173 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:17:21,173 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:17:21,173 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:17:21,173 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:17:21,174 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:17:21,174 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:17:21,174 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:17:21,174 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:17:21,174 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:17:21,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:17:21,175 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:17:21,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:17:21,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:17:21,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:17:21,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:17:21,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:17:21,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:17:21,177 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:17:21,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:17:21,177 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:17:21,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:17:21,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:17:21,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:17:21,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:17:21,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:17:21,178 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:17:21,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:17:21,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:17:21,179 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:17:21,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:17:21,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:17:21,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:17:21,179 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_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 [2022-11-19 07:17:21,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:17:21,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:17:21,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:17:21,477 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:17:21,478 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:17:21,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/loops-crafted-1/in-de32.c [2022-11-19 07:17:21,546 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/data/4871f01ec/082599a352b1412cab21b709c00a5770/FLAGc82e5469c [2022-11-19 07:17:21,985 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:17:21,986 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/sv-benchmarks/c/loops-crafted-1/in-de32.c [2022-11-19 07:17:21,991 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/data/4871f01ec/082599a352b1412cab21b709c00a5770/FLAGc82e5469c [2022-11-19 07:17:22,384 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/data/4871f01ec/082599a352b1412cab21b709c00a5770 [2022-11-19 07:17:22,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:17:22,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:17:22,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:17:22,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:17:22,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:17:22,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:17:22" (1/1) ... [2022-11-19 07:17:22,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ececf80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:22, skipping insertion in model container [2022-11-19 07:17:22,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:17:22" (1/1) ... [2022-11-19 07:17:22,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:17:22,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:17:22,609 WARN L234 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_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/sv-benchmarks/c/loops-crafted-1/in-de32.c[368,381] [2022-11-19 07:17:22,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:17:22,647 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:17:22,670 WARN L234 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_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/sv-benchmarks/c/loops-crafted-1/in-de32.c[368,381] [2022-11-19 07:17:22,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:17:22,694 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:17:22,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:22 WrapperNode [2022-11-19 07:17:22,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:17:22,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:17:22,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:17:22,698 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:17:22,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:22" (1/1) ... [2022-11-19 07:17:22,714 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:22" (1/1) ... [2022-11-19 07:17:22,737 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2022-11-19 07:17:22,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:17:22,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:17:22,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:17:22,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:17:22,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:22" (1/1) ... [2022-11-19 07:17:22,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:22" (1/1) ... [2022-11-19 07:17:22,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:22" (1/1) ... [2022-11-19 07:17:22,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:22" (1/1) ... [2022-11-19 07:17:22,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:22" (1/1) ... [2022-11-19 07:17:22,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:22" (1/1) ... [2022-11-19 07:17:22,770 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:22" (1/1) ... [2022-11-19 07:17:22,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:22" (1/1) ... [2022-11-19 07:17:22,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:17:22,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:17:22,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:17:22,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:17:22,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:22" (1/1) ... [2022-11-19 07:17:22,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:17:22,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:22,817 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:17:22,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:17:22,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:17:22,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:17:22,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:17:22,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:17:22,952 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:17:22,955 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:17:23,081 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:17:23,112 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:17:23,112 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 07:17:23,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:17:23 BoogieIcfgContainer [2022-11-19 07:17:23,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:17:23,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:17:23,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:17:23,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:17:23,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:17:22" (1/3) ... [2022-11-19 07:17:23,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62751125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:17:23, skipping insertion in model container [2022-11-19 07:17:23,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:22" (2/3) ... [2022-11-19 07:17:23,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62751125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:17:23, skipping insertion in model container [2022-11-19 07:17:23,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:17:23" (3/3) ... [2022-11-19 07:17:23,125 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de32.c [2022-11-19 07:17:23,142 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:17:23,143 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:17:23,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:17:23,201 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;@1f0af635, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:17:23,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:17:23,205 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:23,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:17:23,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:23,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:17:23,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:23,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:23,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1774769397, now seen corresponding path program 1 times [2022-11-19 07:17:23,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:23,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094943218] [2022-11-19 07:17:23,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:23,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:17:23,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:23,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094943218] [2022-11-19 07:17:23,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094943218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:23,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:23,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:17:23,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769914499] [2022-11-19 07:17:23,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:23,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:17:23,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:23,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:17:23,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:17:23,584 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:23,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:23,696 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2022-11-19 07:17:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:17:23,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:17:23,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:23,708 INFO L225 Difference]: With dead ends: 18 [2022-11-19 07:17:23,708 INFO L226 Difference]: Without dead ends: 9 [2022-11-19 07:17:23,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:17:23,714 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:23,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:23,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-19 07:17:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-19 07:17:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:23,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2022-11-19 07:17:23,784 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 6 [2022-11-19 07:17:23,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:23,785 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2022-11-19 07:17:23,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:23,785 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2022-11-19 07:17:23,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:17:23,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:23,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:23,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:17:23,787 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:23,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:23,788 INFO L85 PathProgramCache]: Analyzing trace with hash 786204085, now seen corresponding path program 1 times [2022-11-19 07:17:23,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:23,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853964018] [2022-11-19 07:17:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:23,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:17:23,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:23,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853964018] [2022-11-19 07:17:23,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853964018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:23,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:23,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:17:23,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604009299] [2022-11-19 07:17:23,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:23,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:17:23,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:23,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:17:23,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:17:23,903 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2022-11-19 07:17:23,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:23,945 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-11-19 07:17:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:17:23,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 [2022-11-19 07:17:23,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:23,946 INFO L225 Difference]: With dead ends: 17 [2022-11-19 07:17:23,947 INFO L226 Difference]: Without dead ends: 10 [2022-11-19 07:17:23,947 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 [2022-11-19 07:17:23,949 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:23,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:17:23,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-19 07:17:23,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-19 07:17:23,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 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) [2022-11-19 07:17:23,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-11-19 07:17:23,955 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2022-11-19 07:17:23,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:23,956 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-19 07:17:23,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2022-11-19 07:17:23,957 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-11-19 07:17:23,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:17:23,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:23,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:23,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:17:23,958 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:23,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:23,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1794229100, now seen corresponding path program 1 times [2022-11-19 07:17:23,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:23,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138652515] [2022-11-19 07:17:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:23,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:17:24,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:24,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138652515] [2022-11-19 07:17:24,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138652515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:24,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408914694] [2022-11-19 07:17:24,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:24,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:24,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:24,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:24,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:17:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:24,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:17:24,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:17:24,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:17:24,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408914694] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:24,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:17:24,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 8 [2022-11-19 07:17:24,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445749686] [2022-11-19 07:17:24,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:24,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:17:24,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:24,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:17:24,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:17:24,338 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2022-11-19 07:17:24,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:24,368 INFO L93 Difference]: Finished difference Result 14 states and 17 transitions. [2022-11-19 07:17:24,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:17:24,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2022-11-19 07:17:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:24,369 INFO L225 Difference]: With dead ends: 14 [2022-11-19 07:17:24,369 INFO L226 Difference]: Without dead ends: 11 [2022-11-19 07:17:24,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:17:24,371 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:24,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:17:24,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-19 07:17:24,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2022-11-19 07:17:24,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:24,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-11-19 07:17:24,383 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 8 [2022-11-19 07:17:24,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:24,384 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-11-19 07:17:24,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2022-11-19 07:17:24,385 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-11-19 07:17:24,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:17:24,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:24,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:24,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:24,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-19 07:17:24,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:24,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1764408309, now seen corresponding path program 1 times [2022-11-19 07:17:24,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:24,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110329636] [2022-11-19 07:17:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:24,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:17:24,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:24,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110329636] [2022-11-19 07:17:24,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110329636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:24,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396810218] [2022-11-19 07:17:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:24,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:24,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:24,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:24,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:17:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:24,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:17:24,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:17:24,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:17:24,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396810218] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:24,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:17:24,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-11-19 07:17:24,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740477319] [2022-11-19 07:17:24,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:24,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:17:24,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:24,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:17:24,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:17:24,886 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2022-11-19 07:17:24,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:24,908 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2022-11-19 07:17:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:17:24,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2022-11-19 07:17:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:24,910 INFO L225 Difference]: With dead ends: 15 [2022-11-19 07:17:24,910 INFO L226 Difference]: Without dead ends: 10 [2022-11-19 07:17:24,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:17:24,912 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:24,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 3 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:17:24,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-19 07:17:24,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-19 07:17:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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) [2022-11-19 07:17:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-19 07:17:24,918 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 8 [2022-11-19 07:17:24,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:24,919 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-19 07:17:24,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2022-11-19 07:17:24,919 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-19 07:17:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:17:24,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:24,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:24,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:25,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:25,126 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:25,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:25,126 INFO L85 PathProgramCache]: Analyzing trace with hash 212774083, now seen corresponding path program 1 times [2022-11-19 07:17:25,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:25,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661495665] [2022-11-19 07:17:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:25,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:17:25,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:25,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661495665] [2022-11-19 07:17:25,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661495665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:25,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720432272] [2022-11-19 07:17:25,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:25,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:25,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:25,394 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:25,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:17:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:25,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:17:25,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:17:25,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:17:25,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720432272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:25,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1509637427] [2022-11-19 07:17:25,690 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:17:25,690 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:25,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:17:25,700 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:17:25,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:17:25,867 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:25,971 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '335#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:25,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:25,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:25,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-11-19 07:17:25,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390412075] [2022-11-19 07:17:25,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:25,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:17:25,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:25,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:17:25,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:17:25,976 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:26,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:26,044 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2022-11-19 07:17:26,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:17:26,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:17:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:26,046 INFO L225 Difference]: With dead ends: 16 [2022-11-19 07:17:26,046 INFO L226 Difference]: Without dead ends: 13 [2022-11-19 07:17:26,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:17:26,047 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:26,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:17:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-19 07:17:26,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-11-19 07:17:26,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:26,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-19 07:17:26,053 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 9 [2022-11-19 07:17:26,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:26,053 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-19 07:17:26,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:26,054 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-19 07:17:26,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:17:26,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:26,054 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:26,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:26,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:26,260 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:26,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:26,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1375886091, now seen corresponding path program 2 times [2022-11-19 07:17:26,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:26,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351478950] [2022-11-19 07:17:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:26,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:17:26,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:26,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351478950] [2022-11-19 07:17:26,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351478950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:26,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6190559] [2022-11-19 07:17:26,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:17:26,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:26,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:26,372 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:26,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:17:26,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:17:26,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:17:26,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:17:26,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:17:26,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:17:26,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6190559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:26,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1224505846] [2022-11-19 07:17:26,650 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:17:26,650 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:26,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:17:26,651 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:17:26,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:17:26,798 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:26,924 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '452#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:26,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:26,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:26,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 12 [2022-11-19 07:17:26,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860364220] [2022-11-19 07:17:26,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:26,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:17:26,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:26,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:17:26,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:17:26,927 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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) [2022-11-19 07:17:27,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:27,063 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2022-11-19 07:17:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:17:27,064 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 [2022-11-19 07:17:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:27,067 INFO L225 Difference]: With dead ends: 36 [2022-11-19 07:17:27,067 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 07:17:27,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:17:27,069 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:27,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 16 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:27,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 07:17:27,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 12. [2022-11-19 07:17:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:27,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-11-19 07:17:27,080 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2022-11-19 07:17:27,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:27,081 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-11-19 07:17:27,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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) [2022-11-19 07:17:27,081 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-11-19 07:17:27,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:17:27,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:27,085 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:27,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:27,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:27,291 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:27,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:27,291 INFO L85 PathProgramCache]: Analyzing trace with hash -60019915, now seen corresponding path program 3 times [2022-11-19 07:17:27,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:27,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831022688] [2022-11-19 07:17:27,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:27,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:17:27,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:27,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831022688] [2022-11-19 07:17:27,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831022688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:27,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340379945] [2022-11-19 07:17:27,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:17:27,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:27,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:27,405 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:27,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:17:27,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:17:27,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:17:27,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:17:27,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:17:27,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:17:27,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340379945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:27,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [863953893] [2022-11-19 07:17:27,626 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:17:27,626 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:27,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:17:27,627 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:17:27,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:17:27,754 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:27,883 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '619#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:27,883 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:27,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:27,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-19 07:17:27,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95905441] [2022-11-19 07:17:27,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:27,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:17:27,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:27,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:17:27,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:17:27,885 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 13 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) [2022-11-19 07:17:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:28,044 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-11-19 07:17:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:17:28,045 INFO L78 Accepts]: Start accepts. Automaton has has 13 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) Word has length 11 [2022-11-19 07:17:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:28,045 INFO L225 Difference]: With dead ends: 33 [2022-11-19 07:17:28,045 INFO L226 Difference]: Without dead ends: 25 [2022-11-19 07:17:28,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:17:28,046 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:28,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 16 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-19 07:17:28,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-11-19 07:17:28,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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) [2022-11-19 07:17:28,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-19 07:17:28,059 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2022-11-19 07:17:28,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:28,060 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-19 07:17:28,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 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) [2022-11-19 07:17:28,060 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-19 07:17:28,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:17:28,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:28,061 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:28,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 07:17:28,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:28,267 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:28,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:28,267 INFO L85 PathProgramCache]: Analyzing trace with hash -454325109, now seen corresponding path program 4 times [2022-11-19 07:17:28,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:28,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485770547] [2022-11-19 07:17:28,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:28,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:17:28,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:28,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485770547] [2022-11-19 07:17:28,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485770547] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:28,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817688409] [2022-11-19 07:17:28,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:17:28,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:28,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:28,443 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:28,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:17:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:28,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:17:28,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:17:28,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:17:28,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817688409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:28,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2117070375] [2022-11-19 07:17:28,578 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:17:28,578 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:28,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:17:28,579 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:17:28,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:17:28,655 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:28,781 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '796#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:28,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:28,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:28,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-11-19 07:17:28,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671268546] [2022-11-19 07:17:28,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:28,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:17:28,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:28,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:17:28,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:17:28,783 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2022-11-19 07:17:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:28,864 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-11-19 07:17:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:17:28,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 [2022-11-19 07:17:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:28,865 INFO L225 Difference]: With dead ends: 32 [2022-11-19 07:17:28,865 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 07:17:28,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:17:28,866 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:28,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:28,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 07:17:28,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-11-19 07:17:28,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-11-19 07:17:28,881 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 12 [2022-11-19 07:17:28,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:28,881 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-11-19 07:17:28,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2022-11-19 07:17:28,882 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-11-19 07:17:28,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:17:28,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:28,883 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:28,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:29,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:29,089 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:29,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:29,089 INFO L85 PathProgramCache]: Analyzing trace with hash 209136020, now seen corresponding path program 5 times [2022-11-19 07:17:29,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:29,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636453962] [2022-11-19 07:17:29,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:29,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:17:29,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:29,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636453962] [2022-11-19 07:17:29,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636453962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:29,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75987171] [2022-11-19 07:17:29,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:17:29,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:29,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:29,247 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:29,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:17:29,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:17:29,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:17:29,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:17:29,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:17:29,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:17:29,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75987171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:29,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [721464221] [2022-11-19 07:17:29,563 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:17:29,563 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:29,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:17:29,564 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:17:29,564 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:17:29,645 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:29,777 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '997#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:29,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:29,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:29,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-11-19 07:17:29,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023116500] [2022-11-19 07:17:29,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:29,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:17:29,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:29,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:17:29,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:17:29,779 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 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) [2022-11-19 07:17:30,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:30,203 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-11-19 07:17:30,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 07:17:30,204 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 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 14 [2022-11-19 07:17:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:30,204 INFO L225 Difference]: With dead ends: 73 [2022-11-19 07:17:30,204 INFO L226 Difference]: Without dead ends: 58 [2022-11-19 07:17:30,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2022-11-19 07:17:30,206 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 54 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:30,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 18 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:17:30,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-19 07:17:30,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 24. [2022-11-19 07:17:30,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2022-11-19 07:17:30,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-19 07:17:30,220 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2022-11-19 07:17:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:30,221 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-19 07:17:30,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 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) [2022-11-19 07:17:30,221 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-19 07:17:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:17:30,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:30,222 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:30,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:30,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 07:17:30,428 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:30,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:30,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1135226996, now seen corresponding path program 6 times [2022-11-19 07:17:30,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:30,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157665376] [2022-11-19 07:17:30,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:30,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:17:30,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:30,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157665376] [2022-11-19 07:17:30,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157665376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:30,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670857196] [2022-11-19 07:17:30,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:17:30,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:30,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:30,608 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:30,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:17:30,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:17:30,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:17:30,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:17:30,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:17:30,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:17:30,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670857196] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:30,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1857429740] [2022-11-19 07:17:30,942 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:17:30,942 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:30,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:17:30,943 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:17:30,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:17:31,042 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:31,202 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1300#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:31,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:31,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:31,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-11-19 07:17:31,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872476037] [2022-11-19 07:17:31,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:31,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:17:31,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:31,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:17:31,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:17:31,205 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2022-11-19 07:17:31,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:31,766 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-11-19 07:17:31,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 07:17:31,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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 [2022-11-19 07:17:31,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:31,768 INFO L225 Difference]: With dead ends: 51 [2022-11-19 07:17:31,768 INFO L226 Difference]: Without dead ends: 41 [2022-11-19 07:17:31,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:17:31,769 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:31,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 22 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:17:31,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-19 07:17:31,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-11-19 07:17:31,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 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) [2022-11-19 07:17:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-11-19 07:17:31,792 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 15 [2022-11-19 07:17:31,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:31,793 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-11-19 07:17:31,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2022-11-19 07:17:31,793 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-11-19 07:17:31,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:17:31,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:31,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:31,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:32,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:32,001 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:32,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:32,002 INFO L85 PathProgramCache]: Analyzing trace with hash -2107416637, now seen corresponding path program 7 times [2022-11-19 07:17:32,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:32,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043484834] [2022-11-19 07:17:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:32,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:17:32,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:32,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043484834] [2022-11-19 07:17:32,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043484834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:32,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643986769] [2022-11-19 07:17:32,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:17:32,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:32,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:32,242 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:32,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:17:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:32,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:17:32,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:17:32,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:17:32,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643986769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:32,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1195552322] [2022-11-19 07:17:32,406 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:17:32,406 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:32,407 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:17:32,407 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:17:32,407 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:17:32,489 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:32,596 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1570#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:32,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:32,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:32,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-11-19 07:17:32,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797085124] [2022-11-19 07:17:32,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:32,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:17:32,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:32,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:17:32,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:17:32,598 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:32,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:32,695 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-11-19 07:17:32,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:17:32,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-19 07:17:32,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:32,696 INFO L225 Difference]: With dead ends: 47 [2022-11-19 07:17:32,697 INFO L226 Difference]: Without dead ends: 40 [2022-11-19 07:17:32,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:17:32,698 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:32,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-19 07:17:32,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-11-19 07:17:32,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 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) [2022-11-19 07:17:32,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-19 07:17:32,722 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 15 [2022-11-19 07:17:32,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:32,723 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-19 07:17:32,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:32,723 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-19 07:17:32,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 07:17:32,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:32,724 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:32,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:32,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:32,930 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:32,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:32,930 INFO L85 PathProgramCache]: Analyzing trace with hash -239059381, now seen corresponding path program 8 times [2022-11-19 07:17:32,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:32,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135059737] [2022-11-19 07:17:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:32,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:17:33,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:33,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135059737] [2022-11-19 07:17:33,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135059737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:33,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306301329] [2022-11-19 07:17:33,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:17:33,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:33,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:33,135 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:33,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:17:33,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:17:33,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:17:33,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:17:33,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:17:33,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:17:33,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306301329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:33,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [74325343] [2022-11-19 07:17:33,533 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:17:33,534 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:33,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:17:33,534 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:17:33,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:17:33,637 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:33,793 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1845#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:33,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:33,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:33,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2022-11-19 07:17:33,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539746135] [2022-11-19 07:17:33,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:33,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:17:33,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:33,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:17:33,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:17:33,796 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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) [2022-11-19 07:17:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:34,287 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2022-11-19 07:17:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 07:17:34,288 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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 [2022-11-19 07:17:34,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:34,288 INFO L225 Difference]: With dead ends: 79 [2022-11-19 07:17:34,288 INFO L226 Difference]: Without dead ends: 67 [2022-11-19 07:17:34,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:17:34,289 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 59 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:34,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 24 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:17:34,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-19 07:17:34,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 31. [2022-11-19 07:17:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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) [2022-11-19 07:17:34,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-19 07:17:34,312 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2022-11-19 07:17:34,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:34,312 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-19 07:17:34,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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) [2022-11-19 07:17:34,312 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-19 07:17:34,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:17:34,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:34,313 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:34,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:34,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:17:34,519 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:34,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:34,520 INFO L85 PathProgramCache]: Analyzing trace with hash 881880980, now seen corresponding path program 9 times [2022-11-19 07:17:34,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:34,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593991299] [2022-11-19 07:17:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:34,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:17:34,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:34,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593991299] [2022-11-19 07:17:34,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593991299] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:34,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439137466] [2022-11-19 07:17:34,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:17:34,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:34,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:34,786 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:34,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:17:34,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:17:34,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:17:34,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 07:17:34,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:17:34,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:17:35,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439137466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:35,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2076030280] [2022-11-19 07:17:35,223 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:17:35,223 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:35,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:17:35,223 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:17:35,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:17:35,303 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:35,461 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2199#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:35,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:35,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:35,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2022-11-19 07:17:35,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827279251] [2022-11-19 07:17:35,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:35,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:17:35,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:35,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:17:35,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-11-19 07:17:35,463 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 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) [2022-11-19 07:17:36,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:36,442 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2022-11-19 07:17:36,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-19 07:17:36,442 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 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 [2022-11-19 07:17:36,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:36,443 INFO L225 Difference]: With dead ends: 63 [2022-11-19 07:17:36,443 INFO L226 Difference]: Without dead ends: 51 [2022-11-19 07:17:36,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 07:17:36,445 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:36,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 26 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:17:36,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-19 07:17:36,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2022-11-19 07:17:36,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-11-19 07:17:36,496 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 18 [2022-11-19 07:17:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:36,496 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-11-19 07:17:36,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 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) [2022-11-19 07:17:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-11-19 07:17:36,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:17:36,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:36,505 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:36,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-19 07:17:36,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:17:36,716 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:36,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:36,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1384460789, now seen corresponding path program 10 times [2022-11-19 07:17:36,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:36,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722291167] [2022-11-19 07:17:36,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:36,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:17:36,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:36,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722291167] [2022-11-19 07:17:36,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722291167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:36,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702969551] [2022-11-19 07:17:36,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:17:36,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:36,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:36,970 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:36,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:17:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:37,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:17:37,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:17:37,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:17:37,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702969551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:37,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [852898173] [2022-11-19 07:17:37,120 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:17:37,120 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:37,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:17:37,121 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:17:37,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:17:37,186 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:37,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2538#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:37,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:37,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:37,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-11-19 07:17:37,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193798338] [2022-11-19 07:17:37,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:37,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:17:37,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:37,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:17:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:17:37,300 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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) [2022-11-19 07:17:37,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:37,447 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-11-19 07:17:37,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:17:37,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 07:17:37,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:37,450 INFO L225 Difference]: With dead ends: 57 [2022-11-19 07:17:37,450 INFO L226 Difference]: Without dead ends: 49 [2022-11-19 07:17:37,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:17:37,451 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:37,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:37,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-19 07:17:37,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2022-11-19 07:17:37,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 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) [2022-11-19 07:17:37,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-11-19 07:17:37,502 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 18 [2022-11-19 07:17:37,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:37,502 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-11-19 07:17:37,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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) [2022-11-19 07:17:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-11-19 07:17:37,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 07:17:37,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:37,503 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:37,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:37,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:37,708 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:37,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1234948939, now seen corresponding path program 11 times [2022-11-19 07:17:37,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:37,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242609172] [2022-11-19 07:17:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:37,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:17:37,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:37,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242609172] [2022-11-19 07:17:37,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242609172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:37,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350096652] [2022-11-19 07:17:37,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:17:37,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:37,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:37,915 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:37,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:17:37,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:17:37,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:17:37,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 07:17:37,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:17:38,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:17:38,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350096652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:38,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271886084] [2022-11-19 07:17:38,444 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:17:38,444 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:38,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:17:38,445 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:17:38,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:17:38,503 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:38,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2878#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:38,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:38,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:38,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 27 [2022-11-19 07:17:38,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444652820] [2022-11-19 07:17:38,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:38,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 07:17:38,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:38,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 07:17:38,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:17:38,670 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 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) [2022-11-19 07:17:39,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:39,843 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2022-11-19 07:17:39,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-19 07:17:39,848 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 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 [2022-11-19 07:17:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:39,849 INFO L225 Difference]: With dead ends: 108 [2022-11-19 07:17:39,849 INFO L226 Difference]: Without dead ends: 93 [2022-11-19 07:17:39,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 07:17:39,851 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 107 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:39,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 38 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:17:39,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-19 07:17:39,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 37. [2022-11-19 07:17:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2022-11-19 07:17:39,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-19 07:17:39,880 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 20 [2022-11-19 07:17:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:39,880 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-19 07:17:39,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 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) [2022-11-19 07:17:39,881 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-19 07:17:39,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 07:17:39,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:39,882 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:39,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-19 07:17:40,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:17:40,087 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:40,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:40,087 INFO L85 PathProgramCache]: Analyzing trace with hash -264219124, now seen corresponding path program 12 times [2022-11-19 07:17:40,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:40,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473360966] [2022-11-19 07:17:40,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:40,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:17:40,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:40,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473360966] [2022-11-19 07:17:40,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473360966] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:40,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300814845] [2022-11-19 07:17:40,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:17:40,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:40,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:40,360 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:40,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:17:40,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:17:40,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:17:40,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 07:17:40,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:17:40,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:17:40,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300814845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:40,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065456647] [2022-11-19 07:17:40,917 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:17:40,918 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:40,918 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:17:40,918 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:17:40,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:17:40,983 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:41,172 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3334#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:41,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:41,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:41,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 29 [2022-11-19 07:17:41,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947160858] [2022-11-19 07:17:41,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:41,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 07:17:41,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:41,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 07:17:41,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:17:41,174 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 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) [2022-11-19 07:17:42,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:42,874 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-11-19 07:17:42,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-19 07:17:42,879 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 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 21 [2022-11-19 07:17:42,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:42,879 INFO L225 Difference]: With dead ends: 74 [2022-11-19 07:17:42,879 INFO L226 Difference]: Without dead ends: 60 [2022-11-19 07:17:42,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=318, Invalid=2034, Unknown=0, NotChecked=0, Total=2352 [2022-11-19 07:17:42,881 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 34 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:42,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 32 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:17:42,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-19 07:17:42,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2022-11-19 07:17:42,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 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) [2022-11-19 07:17:42,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-11-19 07:17:42,926 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 21 [2022-11-19 07:17:42,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:42,926 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-11-19 07:17:42,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 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) [2022-11-19 07:17:42,927 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-11-19 07:17:42,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 07:17:42,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:42,928 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:42,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-19 07:17:43,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:17:43,133 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:43,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:43,134 INFO L85 PathProgramCache]: Analyzing trace with hash -670240061, now seen corresponding path program 13 times [2022-11-19 07:17:43,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:43,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045210031] [2022-11-19 07:17:43,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:43,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:43,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:17:43,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:43,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045210031] [2022-11-19 07:17:43,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045210031] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:43,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170549863] [2022-11-19 07:17:43,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:17:43,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:43,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:43,380 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:43,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:17:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:43,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:17:43,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:17:43,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:17:43,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170549863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:43,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1946593387] [2022-11-19 07:17:43,549 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:17:43,549 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:43,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:17:43,550 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:17:43,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:17:43,612 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:43,759 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3736#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:43,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:43,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:43,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-11-19 07:17:43,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673968499] [2022-11-19 07:17:43,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:43,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:17:43,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:43,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:17:43,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:17:43,761 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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) [2022-11-19 07:17:43,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:43,937 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-11-19 07:17:43,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:17:43,938 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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 21 [2022-11-19 07:17:43,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:43,939 INFO L225 Difference]: With dead ends: 67 [2022-11-19 07:17:43,939 INFO L226 Difference]: Without dead ends: 58 [2022-11-19 07:17:43,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:17:43,940 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:43,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 19 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-19 07:17:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2022-11-19 07:17:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 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) [2022-11-19 07:17:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-11-19 07:17:43,984 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 21 [2022-11-19 07:17:43,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:43,984 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-11-19 07:17:43,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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) [2022-11-19 07:17:43,985 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-11-19 07:17:43,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 07:17:43,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:43,985 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:43,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:44,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 07:17:44,191 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:44,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:44,192 INFO L85 PathProgramCache]: Analyzing trace with hash -647325269, now seen corresponding path program 14 times [2022-11-19 07:17:44,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:44,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422093010] [2022-11-19 07:17:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:44,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:17:44,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:44,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422093010] [2022-11-19 07:17:44,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422093010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:44,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312339499] [2022-11-19 07:17:44,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:17:44,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:44,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:44,525 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:44,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:17:44,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:17:44,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:17:44,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:17:44,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:17:44,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:17:45,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312339499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:45,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1739190991] [2022-11-19 07:17:45,304 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:17:45,304 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:45,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:17:45,305 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:17:45,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:17:45,363 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:45,583 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4144#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:45,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:45,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:45,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-11-19 07:17:45,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978872642] [2022-11-19 07:17:45,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:45,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 07:17:45,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:45,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 07:17:45,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:17:45,585 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 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) [2022-11-19 07:17:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:52,211 INFO L93 Difference]: Finished difference Result 122 states and 144 transitions. [2022-11-19 07:17:52,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-19 07:17:52,211 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 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 [2022-11-19 07:17:52,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:52,212 INFO L225 Difference]: With dead ends: 122 [2022-11-19 07:17:52,212 INFO L226 Difference]: Without dead ends: 97 [2022-11-19 07:17:52,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1321, Invalid=7235, Unknown=0, NotChecked=0, Total=8556 [2022-11-19 07:17:52,216 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 267 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:52,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 36 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:17:52,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-19 07:17:52,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 60. [2022-11-19 07:17:52,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 59 states have internal predecessors, (73), 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) [2022-11-19 07:17:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2022-11-19 07:17:52,269 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 24 [2022-11-19 07:17:52,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:52,270 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2022-11-19 07:17:52,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 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) [2022-11-19 07:17:52,270 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2022-11-19 07:17:52,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 07:17:52,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:52,271 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:52,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:52,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:17:52,486 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:52,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:52,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1072107637, now seen corresponding path program 15 times [2022-11-19 07:17:52,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:52,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987616592] [2022-11-19 07:17:52,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:52,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:17:52,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:52,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987616592] [2022-11-19 07:17:52,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987616592] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:52,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966298210] [2022-11-19 07:17:52,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:17:52,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:52,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:52,817 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:52,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:17:52,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:17:52,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:17:52,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 07:17:52,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:17:52,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:17:53,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966298210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:53,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2007566896] [2022-11-19 07:17:53,043 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:17:53,044 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:53,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:17:53,044 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:17:53,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:17:53,126 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:53,246 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4757#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:53,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:53,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:53,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2022-11-19 07:17:53,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779848314] [2022-11-19 07:17:53,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:53,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 07:17:53,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:53,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 07:17:53,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:17:53,249 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 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) [2022-11-19 07:17:53,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:53,535 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2022-11-19 07:17:53,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:17:53,536 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 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 [2022-11-19 07:17:53,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:53,537 INFO L225 Difference]: With dead ends: 90 [2022-11-19 07:17:53,537 INFO L226 Difference]: Without dead ends: 80 [2022-11-19 07:17:53,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:17:53,538 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:53,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:17:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-19 07:17:53,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2022-11-19 07:17:53,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 67 states have internal predecessors, (82), 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) [2022-11-19 07:17:53,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2022-11-19 07:17:53,597 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 24 [2022-11-19 07:17:53,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:53,597 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2022-11-19 07:17:53,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 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) [2022-11-19 07:17:53,597 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2022-11-19 07:17:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 07:17:53,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:53,598 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:53,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:53,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:53,798 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:53,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:53,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1422218667, now seen corresponding path program 16 times [2022-11-19 07:17:53,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:53,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646681427] [2022-11-19 07:17:53,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:53,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:17:54,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:54,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646681427] [2022-11-19 07:17:54,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646681427] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:54,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109289881] [2022-11-19 07:17:54,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:17:54,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:54,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:54,260 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:54,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:17:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:54,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-19 07:17:54,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:17:54,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:17:55,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109289881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:55,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [144301947] [2022-11-19 07:17:55,250 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:17:55,250 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:55,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:17:55,250 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:17:55,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:17:55,313 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:55,549 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5264#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:55,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:55,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:55,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 40 [2022-11-19 07:17:55,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608064410] [2022-11-19 07:17:55,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:55,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-19 07:17:55,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:55,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-19 07:17:55,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1524, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 07:17:55,551 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:59,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:59,275 INFO L93 Difference]: Finished difference Result 214 states and 251 transitions. [2022-11-19 07:17:59,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-19 07:17:59,275 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-19 07:17:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:59,276 INFO L225 Difference]: With dead ends: 214 [2022-11-19 07:17:59,277 INFO L226 Difference]: Without dead ends: 185 [2022-11-19 07:17:59,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1440, Invalid=4880, Unknown=0, NotChecked=0, Total=6320 [2022-11-19 07:17:59,279 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 229 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:59,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 18 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:17:59,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-19 07:17:59,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 60. [2022-11-19 07:17:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 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) [2022-11-19 07:17:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-11-19 07:17:59,347 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 27 [2022-11-19 07:17:59,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:59,348 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-11-19 07:17:59,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:59,349 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-11-19 07:17:59,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 07:17:59,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:59,350 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:59,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:59,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:59,557 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:59,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:59,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1600690749, now seen corresponding path program 17 times [2022-11-19 07:17:59,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:59,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676019430] [2022-11-19 07:17:59,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:59,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:17:59,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:59,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676019430] [2022-11-19 07:17:59,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676019430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:59,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030010442] [2022-11-19 07:17:59,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:17:59,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:59,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:59,889 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:59,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 07:18:00,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:18:00,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:18:00,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 07:18:00,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:18:00,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:18:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:18:00,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030010442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:18:00,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1546194464] [2022-11-19 07:18:00,224 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:18:00,225 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:18:00,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:18:00,225 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:18:00,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:18:00,298 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:18:00,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6048#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:18:00,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:18:00,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:18:00,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2022-11-19 07:18:00,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199619660] [2022-11-19 07:18:00,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:18:00,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:18:00,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:18:00,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:18:00,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:18:00,423 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 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) [2022-11-19 07:18:00,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:00,712 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2022-11-19 07:18:00,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:18:00,713 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 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 [2022-11-19 07:18:00,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:00,714 INFO L225 Difference]: With dead ends: 101 [2022-11-19 07:18:00,714 INFO L226 Difference]: Without dead ends: 90 [2022-11-19 07:18:00,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:18:00,715 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:00,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:18:00,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-19 07:18:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2022-11-19 07:18:00,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 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) [2022-11-19 07:18:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-11-19 07:18:00,772 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 27 [2022-11-19 07:18:00,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:00,773 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-11-19 07:18:00,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 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) [2022-11-19 07:18:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-11-19 07:18:00,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:18:00,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:00,774 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 6, 1, 1, 1, 1, 1, 1] [2022-11-19 07:18:00,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-19 07:18:00,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:18:00,979 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:00,980 INFO L85 PathProgramCache]: Analyzing trace with hash -102855189, now seen corresponding path program 18 times [2022-11-19 07:18:00,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:18:00,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105538235] [2022-11-19 07:18:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:00,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:18:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:18:01,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:18:01,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105538235] [2022-11-19 07:18:01,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105538235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:18:01,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876467926] [2022-11-19 07:18:01,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:18:01,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:18:01,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:18:01,396 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:18:01,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 07:18:01,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:18:01,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:18:01,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-19 07:18:01,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:18:01,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:18:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 07:18:02,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876467926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:18:02,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [351530644] [2022-11-19 07:18:02,322 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:18:02,322 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:18:02,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:18:02,322 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:18:02,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:18:02,390 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:18:02,627 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6587#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:18:02,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:18:02,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:18:02,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 16] total 40 [2022-11-19 07:18:02,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724128490] [2022-11-19 07:18:02,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:18:02,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-19 07:18:02,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:18:02,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-19 07:18:02,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 07:18:02,630 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 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) [2022-11-19 07:18:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:09,173 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2022-11-19 07:18:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-19 07:18:09,174 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 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 [2022-11-19 07:18:09,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:09,175 INFO L225 Difference]: With dead ends: 134 [2022-11-19 07:18:09,175 INFO L226 Difference]: Without dead ends: 106 [2022-11-19 07:18:09,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=663, Invalid=5343, Unknown=0, NotChecked=0, Total=6006 [2022-11-19 07:18:09,177 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 57 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:09,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 50 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 07:18:09,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-19 07:18:09,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2022-11-19 07:18:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.184782608695652) internal successors, (109), 92 states have internal predecessors, (109), 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) [2022-11-19 07:18:09,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2022-11-19 07:18:09,249 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 28 [2022-11-19 07:18:09,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:09,249 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2022-11-19 07:18:09,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 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) [2022-11-19 07:18:09,250 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2022-11-19 07:18:09,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 07:18:09,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:09,251 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-11-19 07:18:09,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:18:09,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:18:09,451 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:09,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:09,452 INFO L85 PathProgramCache]: Analyzing trace with hash -520490741, now seen corresponding path program 19 times [2022-11-19 07:18:09,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:18:09,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330573998] [2022-11-19 07:18:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:09,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:18:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:18:09,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:18:09,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330573998] [2022-11-19 07:18:09,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330573998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:18:09,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119056816] [2022-11-19 07:18:09,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:18:09,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:18:09,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:18:09,836 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:18:09,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 07:18:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:09,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-19 07:18:09,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:18:09,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:18:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:18:10,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119056816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:18:10,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1718314376] [2022-11-19 07:18:10,047 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:18:10,047 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:18:10,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:18:10,047 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:18:10,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:18:10,107 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:18:10,253 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7286#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:18:10,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:18:10,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:18:10,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 13 [2022-11-19 07:18:10,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035805225] [2022-11-19 07:18:10,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:18:10,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:18:10,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:18:10,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:18:10,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:18:10,255 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 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) [2022-11-19 07:18:10,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:10,673 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2022-11-19 07:18:10,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:18:10,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-19 07:18:10,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:10,674 INFO L225 Difference]: With dead ends: 131 [2022-11-19 07:18:10,675 INFO L226 Difference]: Without dead ends: 119 [2022-11-19 07:18:10,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:18:10,676 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:10,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:18:10,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-19 07:18:10,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 102. [2022-11-19 07:18:10,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 101 states have internal predecessors, (119), 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) [2022-11-19 07:18:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2022-11-19 07:18:10,770 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 30 [2022-11-19 07:18:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:10,770 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2022-11-19 07:18:10,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 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) [2022-11-19 07:18:10,771 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2022-11-19 07:18:10,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:18:10,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:10,771 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 1, 1, 1, 1, 1, 1] [2022-11-19 07:18:10,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 07:18:10,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 07:18:10,976 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:10,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:10,977 INFO L85 PathProgramCache]: Analyzing trace with hash -2032401620, now seen corresponding path program 20 times [2022-11-19 07:18:10,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:18:10,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307118356] [2022-11-19 07:18:10,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:10,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:18:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:18:11,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:18:11,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307118356] [2022-11-19 07:18:11,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307118356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:18:11,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700107149] [2022-11-19 07:18:11,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:18:11,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:18:11,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:18:11,474 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:18:11,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 07:18:11,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:18:11,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:18:11,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 07:18:11,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:18:12,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:18:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:18:13,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700107149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:18:13,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [94473001] [2022-11-19 07:18:13,360 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:18:13,360 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:18:13,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:18:13,360 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:18:13,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:18:13,436 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:18:13,722 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7980#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:18:13,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:18:13,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:18:13,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 56 [2022-11-19 07:18:13,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816376970] [2022-11-19 07:18:13,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:18:13,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-19 07:18:13,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:18:13,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-19 07:18:13,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=619, Invalid=2921, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 07:18:13,725 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 56 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 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) [2022-11-19 07:18:56,404 WARN L233 SmtUtils]: Spent 6.65s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:18:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:56,722 INFO L93 Difference]: Finished difference Result 214 states and 254 transitions. [2022-11-19 07:18:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-11-19 07:18:56,723 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 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 31 [2022-11-19 07:18:56,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:56,724 INFO L225 Difference]: With dead ends: 214 [2022-11-19 07:18:56,724 INFO L226 Difference]: Without dead ends: 160 [2022-11-19 07:18:56,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5922 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=3691, Invalid=22069, Unknown=0, NotChecked=0, Total=25760 [2022-11-19 07:18:56,730 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 547 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:56,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 66 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-19 07:18:56,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-19 07:18:56,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 101. [2022-11-19 07:18:56,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.2) internal successors, (120), 100 states have internal predecessors, (120), 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) [2022-11-19 07:18:56,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2022-11-19 07:18:56,839 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 31 [2022-11-19 07:18:56,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:56,839 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2022-11-19 07:18:56,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 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) [2022-11-19 07:18:56,840 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2022-11-19 07:18:56,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 07:18:56,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:56,840 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-11-19 07:18:56,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-19 07:18:57,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 07:18:57,041 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:57,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1257158851, now seen corresponding path program 21 times [2022-11-19 07:18:57,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:18:57,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930395156] [2022-11-19 07:18:57,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:57,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:18:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 07:18:57,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:18:57,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930395156] [2022-11-19 07:18:57,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930395156] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:18:57,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921070410] [2022-11-19 07:18:57,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:18:57,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:18:57,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:18:57,446 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:18:57,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 07:18:57,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:18:57,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:18:57,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-19 07:18:57,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 07:18:57,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:18:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 07:18:57,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921070410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:18:57,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [223622157] [2022-11-19 07:18:57,658 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:18:57,658 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:18:57,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:18:57,659 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:18:57,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:18:57,714 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:18:57,865 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9010#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:18:57,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:18:57,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:18:57,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2022-11-19 07:18:57,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828300497] [2022-11-19 07:18:57,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:18:57,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:18:57,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:18:57,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:18:57,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:18:57,868 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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) [2022-11-19 07:18:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:58,297 INFO L93 Difference]: Finished difference Result 140 states and 161 transitions. [2022-11-19 07:18:58,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:18:58,298 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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 33 [2022-11-19 07:18:58,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:58,299 INFO L225 Difference]: With dead ends: 140 [2022-11-19 07:18:58,299 INFO L226 Difference]: Without dead ends: 127 [2022-11-19 07:18:58,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:18:58,300 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:58,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 25 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:18:58,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-19 07:18:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 111. [2022-11-19 07:18:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.190909090909091) internal successors, (131), 110 states have internal predecessors, (131), 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) [2022-11-19 07:18:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2022-11-19 07:18:58,413 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 33 [2022-11-19 07:18:58,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:58,413 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2022-11-19 07:18:58,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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) [2022-11-19 07:18:58,414 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2022-11-19 07:18:58,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 07:18:58,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:58,415 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 8, 1, 1, 1, 1, 1, 1] [2022-11-19 07:18:58,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-19 07:18:58,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:18:58,620 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:58,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:58,620 INFO L85 PathProgramCache]: Analyzing trace with hash -747966284, now seen corresponding path program 22 times [2022-11-19 07:18:58,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:18:58,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709373214] [2022-11-19 07:18:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:58,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:18:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:18:59,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:18:59,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709373214] [2022-11-19 07:18:59,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709373214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:18:59,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957405078] [2022-11-19 07:18:59,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:18:59,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:18:59,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:18:59,192 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:18:59,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-19 07:18:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:59,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-19 07:18:59,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:18:59,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-19 07:19:00,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957405078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:00,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [872540969] [2022-11-19 07:19:00,496 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:19:00,496 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:19:00,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:19:00,497 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:19:00,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:19:00,566 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:19:00,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9753#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:19:00,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:19:00,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:19:00,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 20] total 51 [2022-11-19 07:19:00,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954678173] [2022-11-19 07:19:00,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:19:00,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 07:19:00,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:19:00,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 07:19:00,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=2411, Unknown=0, NotChecked=0, Total=2970 [2022-11-19 07:19:00,812 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 51 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) [2022-11-19 07:19:12,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:12,983 INFO L93 Difference]: Finished difference Result 424 states and 484 transitions. [2022-11-19 07:19:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-19 07:19:12,984 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 51 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) Word has length 34 [2022-11-19 07:19:12,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:12,985 INFO L225 Difference]: With dead ends: 424 [2022-11-19 07:19:12,985 INFO L226 Difference]: Without dead ends: 395 [2022-11-19 07:19:12,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3570 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=2892, Invalid=8880, Unknown=0, NotChecked=0, Total=11772 [2022-11-19 07:19:12,987 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 410 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:12,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 42 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 07:19:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-11-19 07:19:13,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 114. [2022-11-19 07:19:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 113 states have internal predecessors, (134), 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) [2022-11-19 07:19:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 134 transitions. [2022-11-19 07:19:13,102 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 134 transitions. Word has length 34 [2022-11-19 07:19:13,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:13,102 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 134 transitions. [2022-11-19 07:19:13,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 51 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) [2022-11-19 07:19:13,102 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 134 transitions. [2022-11-19 07:19:13,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 07:19:13,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:13,103 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1] [2022-11-19 07:19:13,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-19 07:19:13,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-19 07:19:13,303 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:19:13,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:13,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1218466763, now seen corresponding path program 23 times [2022-11-19 07:19:13,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:19:13,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166575755] [2022-11-19 07:19:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:13,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:19:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:19:13,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:19:13,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166575755] [2022-11-19 07:19:13,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166575755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:19:13,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839805854] [2022-11-19 07:19:13,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:19:13,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:19:13,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:19:13,836 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:19:13,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 07:19:14,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:19:14,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:19:14,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-19 07:19:14,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:19:14,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:19:15,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839805854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:15,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300567476] [2022-11-19 07:19:15,420 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:19:15,420 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:19:15,421 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:19:15,421 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:19:15,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:19:15,483 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:19:15,747 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11192#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:19:15,748 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:19:15,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:19:15,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 53 [2022-11-19 07:19:15,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316996680] [2022-11-19 07:19:15,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:19:15,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-19 07:19:15,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:19:15,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-19 07:19:15,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=2804, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 07:19:15,753 INFO L87 Difference]: Start difference. First operand 114 states and 134 transitions. Second operand has 53 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 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) [2022-11-19 07:19:32,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:32,468 INFO L93 Difference]: Finished difference Result 167 states and 197 transitions. [2022-11-19 07:19:32,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-19 07:19:32,468 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 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 35 [2022-11-19 07:19:32,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:32,469 INFO L225 Difference]: With dead ends: 167 [2022-11-19 07:19:32,469 INFO L226 Difference]: Without dead ends: 142 [2022-11-19 07:19:32,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=742, Invalid=5110, Unknown=0, NotChecked=0, Total=5852 [2022-11-19 07:19:32,473 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 43 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:32,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 52 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-19 07:19:32,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-19 07:19:32,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2022-11-19 07:19:32,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1693548387096775) internal successors, (145), 124 states have internal predecessors, (145), 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) [2022-11-19 07:19:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 145 transitions. [2022-11-19 07:19:32,605 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 145 transitions. Word has length 35 [2022-11-19 07:19:32,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:32,605 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 145 transitions. [2022-11-19 07:19:32,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 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) [2022-11-19 07:19:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 145 transitions. [2022-11-19 07:19:32,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 07:19:32,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:32,606 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-19 07:19:32,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:32,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 07:19:32,808 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:19:32,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:32,809 INFO L85 PathProgramCache]: Analyzing trace with hash 139580043, now seen corresponding path program 24 times [2022-11-19 07:19:32,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:19:32,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99052940] [2022-11-19 07:19:32,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:32,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:19:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:19:33,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:19:33,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99052940] [2022-11-19 07:19:33,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99052940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:19:33,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034341448] [2022-11-19 07:19:33,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:19:33,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:19:33,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:19:33,264 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:19:33,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-19 07:19:33,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:19:33,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:19:33,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-19 07:19:33,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:19:33,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:19:33,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034341448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:33,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952627873] [2022-11-19 07:19:33,509 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:19:33,509 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:19:33,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:19:33,510 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:19:33,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:19:33,571 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:19:33,730 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12031#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:19:33,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:19:33,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:19:33,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 15 [2022-11-19 07:19:33,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826431353] [2022-11-19 07:19:33,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:19:33,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 07:19:33,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:19:33,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 07:19:33,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:19:33,731 INFO L87 Difference]: Start difference. First operand 125 states and 145 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:34,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:34,403 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2022-11-19 07:19:34,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:19:34,404 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-19 07:19:34,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:34,404 INFO L225 Difference]: With dead ends: 168 [2022-11-19 07:19:34,404 INFO L226 Difference]: Without dead ends: 154 [2022-11-19 07:19:34,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:19:34,405 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:34,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:19:34,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-19 07:19:34,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 136. [2022-11-19 07:19:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.162962962962963) internal successors, (157), 135 states have internal predecessors, (157), 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) [2022-11-19 07:19:34,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 157 transitions. [2022-11-19 07:19:34,568 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 157 transitions. Word has length 36 [2022-11-19 07:19:34,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:34,568 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 157 transitions. [2022-11-19 07:19:34,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:34,568 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 157 transitions. [2022-11-19 07:19:34,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 07:19:34,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:34,569 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 9, 1, 1, 1, 1, 1, 1] [2022-11-19 07:19:34,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-19 07:19:34,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 07:19:34,769 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:19:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:34,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1868330580, now seen corresponding path program 25 times [2022-11-19 07:19:34,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:19:34,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766059098] [2022-11-19 07:19:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:34,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:19:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:35,437 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 07:19:35,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:19:35,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766059098] [2022-11-19 07:19:35,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766059098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:19:35,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50001523] [2022-11-19 07:19:35,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:19:35,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:19:35,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:19:35,440 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:19:35,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-19 07:19:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:35,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-19 07:19:35,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:36,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-19 07:19:37,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50001523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:37,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [952149752] [2022-11-19 07:19:37,053 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:19:37,053 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:19:37,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:19:37,053 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:19:37,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:19:37,111 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:19:37,380 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12903#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:19:37,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:19:37,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:19:37,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 22] total 56 [2022-11-19 07:19:37,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53045134] [2022-11-19 07:19:37,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:19:37,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-19 07:19:37,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:19:37,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-19 07:19:37,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=2881, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 07:19:37,383 INFO L87 Difference]: Start difference. First operand 136 states and 157 transitions. Second operand has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 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) [2022-11-19 07:19:57,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:57,675 INFO L93 Difference]: Finished difference Result 536 states and 606 transitions. [2022-11-19 07:19:57,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-19 07:19:57,676 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 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) Word has length 37 [2022-11-19 07:19:57,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:57,678 INFO L225 Difference]: With dead ends: 536 [2022-11-19 07:19:57,678 INFO L226 Difference]: Without dead ends: 481 [2022-11-19 07:19:57,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6102 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=4325, Invalid=13765, Unknown=0, NotChecked=0, Total=18090 [2022-11-19 07:19:57,681 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 374 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:57,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 51 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-19 07:19:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-11-19 07:19:57,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 124. [2022-11-19 07:19:57,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 123 states have internal predecessors, (143), 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) [2022-11-19 07:19:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2022-11-19 07:19:57,857 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 37 [2022-11-19 07:19:57,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:57,857 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2022-11-19 07:19:57,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 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) [2022-11-19 07:19:57,857 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2022-11-19 07:19:57,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 07:19:57,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:57,858 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1] [2022-11-19 07:19:57,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:58,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 07:19:58,064 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:19:58,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:58,065 INFO L85 PathProgramCache]: Analyzing trace with hash -244089781, now seen corresponding path program 26 times [2022-11-19 07:19:58,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:19:58,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723915007] [2022-11-19 07:19:58,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:58,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:19:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-19 07:19:58,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:19:58,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723915007] [2022-11-19 07:19:58,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723915007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:19:58,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902721908] [2022-11-19 07:19:58,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:19:58,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:19:58,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:19:58,650 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:19:58,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-19 07:19:59,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-19 07:19:59,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:19:59,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-19 07:19:59,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-19 07:19:59,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-19 07:20:00,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902721908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:00,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [784129475] [2022-11-19 07:20:00,818 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:20:00,818 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:20:00,818 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:20:00,818 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:20:00,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:20:00,877 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:20:01,165 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14652#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:20:01,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:20:01,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:20:01,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 58 [2022-11-19 07:20:01,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768409717] [2022-11-19 07:20:01,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:20:01,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-19 07:20:01,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:01,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-19 07:20:01,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=3335, Unknown=0, NotChecked=0, Total=3782 [2022-11-19 07:20:01,168 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand has 58 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 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) [2022-11-19 07:20:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:29,011 INFO L93 Difference]: Finished difference Result 181 states and 211 transitions. [2022-11-19 07:20:29,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-19 07:20:29,011 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 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 38 [2022-11-19 07:20:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:29,012 INFO L225 Difference]: With dead ends: 181 [2022-11-19 07:20:29,012 INFO L226 Difference]: Without dead ends: 154 [2022-11-19 07:20:29,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=864, Invalid=6108, Unknown=0, NotChecked=0, Total=6972 [2022-11-19 07:20:29,014 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 53 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:29,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 58 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-19 07:20:29,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-19 07:20:29,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 136. [2022-11-19 07:20:29,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 135 states have internal predecessors, (155), 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) [2022-11-19 07:20:29,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 155 transitions. [2022-11-19 07:20:29,208 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 155 transitions. Word has length 38 [2022-11-19 07:20:29,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:29,208 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 155 transitions. [2022-11-19 07:20:29,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 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) [2022-11-19 07:20:29,208 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 155 transitions. [2022-11-19 07:20:29,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 07:20:29,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:29,209 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:29,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:29,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:29,409 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:29,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:29,410 INFO L85 PathProgramCache]: Analyzing trace with hash -503387197, now seen corresponding path program 27 times [2022-11-19 07:20:29,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:29,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48977760] [2022-11-19 07:20:29,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:29,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-19 07:20:29,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:29,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48977760] [2022-11-19 07:20:29,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48977760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:20:29,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480833931] [2022-11-19 07:20:29,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:20:29,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:29,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:29,916 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:29,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-19 07:20:29,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:20:29,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:20:29,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-19 07:20:29,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-19 07:20:30,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-19 07:20:30,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480833931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:30,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1642906127] [2022-11-19 07:20:30,150 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:20:30,150 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:20:30,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:20:30,151 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:20:30,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:20:30,204 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:20:30,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15564#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:20:30,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:20:30,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:20:30,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 16 [2022-11-19 07:20:30,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302999426] [2022-11-19 07:20:30,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:20:30,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:20:30,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:30,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:20:30,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:20:30,351 INFO L87 Difference]: Start difference. First operand 136 states and 155 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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) [2022-11-19 07:20:30,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:30,989 INFO L93 Difference]: Finished difference Result 183 states and 204 transitions. [2022-11-19 07:20:30,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 07:20:30,989 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 39 [2022-11-19 07:20:30,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:30,990 INFO L225 Difference]: With dead ends: 183 [2022-11-19 07:20:30,990 INFO L226 Difference]: Without dead ends: 168 [2022-11-19 07:20:30,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:20:30,992 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:30,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 31 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:20:30,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-19 07:20:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 148. [2022-11-19 07:20:31,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.1428571428571428) internal successors, (168), 147 states have internal predecessors, (168), 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) [2022-11-19 07:20:31,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 168 transitions. [2022-11-19 07:20:31,179 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 168 transitions. Word has length 39 [2022-11-19 07:20:31,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:31,180 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 168 transitions. [2022-11-19 07:20:31,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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) [2022-11-19 07:20:31,180 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 168 transitions. [2022-11-19 07:20:31,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 07:20:31,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:31,181 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 10, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:31,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:31,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-19 07:20:31,386 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:31,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:31,386 INFO L85 PathProgramCache]: Analyzing trace with hash 689948084, now seen corresponding path program 28 times [2022-11-19 07:20:31,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:31,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743185056] [2022-11-19 07:20:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:31,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:20:32,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:32,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743185056] [2022-11-19 07:20:32,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743185056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:20:32,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206897530] [2022-11-19 07:20:32,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:20:32,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:32,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:32,058 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:32,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-19 07:20:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:32,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-19 07:20:32,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:32,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-19 07:20:33,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206897530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:33,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1057158054] [2022-11-19 07:20:33,741 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:20:33,741 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:20:33,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:20:33,741 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:20:33,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:20:33,804 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:20:34,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16513#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:20:34,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:20:34,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:20:34,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 24] total 61 [2022-11-19 07:20:34,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338915413] [2022-11-19 07:20:34,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:20:34,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-19 07:20:34,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:34,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-19 07:20:34,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=767, Invalid=3393, Unknown=0, NotChecked=0, Total=4160 [2022-11-19 07:20:34,088 INFO L87 Difference]: Start difference. First operand 148 states and 168 transitions. Second operand has 61 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 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) [2022-11-19 07:21:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:08,846 INFO L93 Difference]: Finished difference Result 640 states and 718 transitions. [2022-11-19 07:21:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-11-19 07:21:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 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 40 [2022-11-19 07:21:08,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:08,849 INFO L225 Difference]: With dead ends: 640 [2022-11-19 07:21:08,850 INFO L226 Difference]: Without dead ends: 577 [2022-11-19 07:21:08,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8156 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=5609, Invalid=17647, Unknown=0, NotChecked=0, Total=23256 [2022-11-19 07:21:08,852 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 546 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 2365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:08,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 84 Invalid, 2365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 1838 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-19 07:21:08,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-11-19 07:21:09,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 130. [2022-11-19 07:21:09,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.1472868217054264) internal successors, (148), 129 states have internal predecessors, (148), 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) [2022-11-19 07:21:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2022-11-19 07:21:09,049 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 40 [2022-11-19 07:21:09,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:09,049 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2022-11-19 07:21:09,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 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) [2022-11-19 07:21:09,050 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2022-11-19 07:21:09,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 07:21:09,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:09,050 INFO L195 NwaCegarLoop]: trace histogram [17, 13, 5, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:09,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-19 07:21:09,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:21:09,256 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:21:09,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:09,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1172425347, now seen corresponding path program 29 times [2022-11-19 07:21:09,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:21:09,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982779969] [2022-11-19 07:21:09,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:09,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:21:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-19 07:21:09,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:21:09,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982779969] [2022-11-19 07:21:09,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982779969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:21:09,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221654074] [2022-11-19 07:21:09,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:21:09,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:21:09,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:21:09,915 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:21:09,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-19 07:21:10,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-19 07:21:10,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:21:10,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:21:10,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:21:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 48 proven. 30 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-19 07:21:10,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:21:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-19 07:21:12,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221654074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:21:12,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1144551100] [2022-11-19 07:21:12,028 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:21:12,028 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:21:12,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:21:12,029 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:21:12,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:21:12,092 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:21:12,391 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18518#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:21:12,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:21:12,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:21:12,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 14] total 49 [2022-11-19 07:21:12,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008890612] [2022-11-19 07:21:12,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:21:12,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-19 07:21:12,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:21:12,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-19 07:21:12,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2493, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 07:21:12,394 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:37,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:37,126 INFO L93 Difference]: Finished difference Result 273 states and 311 transitions. [2022-11-19 07:21:37,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-11-19 07:21:37,127 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-19 07:21:37,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:37,128 INFO L225 Difference]: With dead ends: 273 [2022-11-19 07:21:37,128 INFO L226 Difference]: Without dead ends: 234 [2022-11-19 07:21:37,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5661 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=1633, Invalid=22237, Unknown=0, NotChecked=0, Total=23870 [2022-11-19 07:21:37,130 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 115 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3072 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 3322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 3072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:37,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 52 Invalid, 3322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 3072 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-19 07:21:37,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-19 07:21:37,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 181. [2022-11-19 07:21:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.1166666666666667) internal successors, (201), 180 states have internal predecessors, (201), 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) [2022-11-19 07:21:37,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 201 transitions. [2022-11-19 07:21:37,448 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 201 transitions. Word has length 41 [2022-11-19 07:21:37,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:37,448 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 201 transitions. [2022-11-19 07:21:37,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:37,448 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 201 transitions. [2022-11-19 07:21:37,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 07:21:37,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:37,449 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:37,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-19 07:21:37,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:21:37,655 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:21:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:37,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1571515381, now seen corresponding path program 30 times [2022-11-19 07:21:37,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:21:37,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112824399] [2022-11-19 07:21:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:37,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:21:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-19 07:21:38,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:21:38,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112824399] [2022-11-19 07:21:38,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112824399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:21:38,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757345975] [2022-11-19 07:21:38,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:21:38,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:21:38,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:21:38,285 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:21:38,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-19 07:21:38,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:21:38,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:21:38,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-19 07:21:38,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:21:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-19 07:21:38,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:21:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-19 07:21:38,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757345975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:21:38,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1282639443] [2022-11-19 07:21:38,506 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:21:38,506 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:21:38,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:21:38,506 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:21:38,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:21:38,560 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:21:38,712 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19883#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:21:38,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:21:38,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:21:38,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 17 [2022-11-19 07:21:38,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708375471] [2022-11-19 07:21:38,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:21:38,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:21:38,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:21:38,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:21:38,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:21:38,714 INFO L87 Difference]: Start difference. First operand 181 states and 201 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 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) [2022-11-19 07:21:39,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:39,825 INFO L93 Difference]: Finished difference Result 301 states and 328 transitions. [2022-11-19 07:21:39,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:21:39,826 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 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 42 [2022-11-19 07:21:39,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:39,827 INFO L225 Difference]: With dead ends: 301 [2022-11-19 07:21:39,827 INFO L226 Difference]: Without dead ends: 285 [2022-11-19 07:21:39,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:21:39,828 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:39,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 61 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:21:39,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-19 07:21:40,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 195. [2022-11-19 07:21:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.1185567010309279) internal successors, (217), 194 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) [2022-11-19 07:21:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 217 transitions. [2022-11-19 07:21:40,199 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 217 transitions. Word has length 42 [2022-11-19 07:21:40,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:40,199 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 217 transitions. [2022-11-19 07:21:40,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 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) [2022-11-19 07:21:40,200 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 217 transitions. [2022-11-19 07:21:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 07:21:40,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:40,201 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:40,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-19 07:21:40,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-19 07:21:40,406 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:21:40,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:40,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1529432267, now seen corresponding path program 31 times [2022-11-19 07:21:40,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:21:40,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933334288] [2022-11-19 07:21:40,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:40,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:21:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-19 07:21:41,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:21:41,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933334288] [2022-11-19 07:21:41,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933334288] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:21:41,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874408543] [2022-11-19 07:21:41,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:21:41,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:21:41,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:21:41,069 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:21:41,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-19 07:21:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:41,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-19 07:21:41,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:21:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-19 07:21:41,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:21:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-19 07:21:43,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874408543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:21:43,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1969508381] [2022-11-19 07:21:43,159 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:21:43,159 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:21:43,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:21:43,160 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:21:43,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:21:43,212 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:21:43,551 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21186#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:21:43,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:21:43,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:21:43,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 28] total 67 [2022-11-19 07:21:43,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387157881] [2022-11-19 07:21:43,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:21:43,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-19 07:21:43,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:21:43,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-19 07:21:43,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=4241, Unknown=0, NotChecked=0, Total=4970 [2022-11-19 07:21:43,553 INFO L87 Difference]: Start difference. First operand 195 states and 217 transitions. Second operand has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 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) [2022-11-19 07:23:17,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:17,443 INFO L93 Difference]: Finished difference Result 733 states and 804 transitions. [2022-11-19 07:23:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-11-19 07:23:17,444 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 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 43 [2022-11-19 07:23:17,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:17,445 INFO L225 Difference]: With dead ends: 733 [2022-11-19 07:23:17,445 INFO L226 Difference]: Without dead ends: 680 [2022-11-19 07:23:17,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8266 ImplicationChecksByTransitivity, 79.7s TimeCoverageRelationStatistics Valid=5340, Invalid=20420, Unknown=0, NotChecked=0, Total=25760 [2022-11-19 07:23:17,447 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 705 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:17,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 85 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time] [2022-11-19 07:23:17,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-11-19 07:23:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 175. [2022-11-19 07:23:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.1551724137931034) internal successors, (201), 174 states have internal predecessors, (201), 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) [2022-11-19 07:23:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 201 transitions. [2022-11-19 07:23:17,784 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 201 transitions. Word has length 43 [2022-11-19 07:23:17,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:17,784 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 201 transitions. [2022-11-19 07:23:17,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 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) [2022-11-19 07:23:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 201 transitions. [2022-11-19 07:23:17,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 07:23:17,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:17,785 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1] [2022-11-19 07:23:17,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-19 07:23:17,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-19 07:23:17,992 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:23:17,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:17,992 INFO L85 PathProgramCache]: Analyzing trace with hash -109889653, now seen corresponding path program 32 times [2022-11-19 07:23:17,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:17,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756671699] [2022-11-19 07:23:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:17,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-19 07:23:18,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:18,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756671699] [2022-11-19 07:23:18,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756671699] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:23:18,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241773828] [2022-11-19 07:23:18,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:23:18,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:23:18,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:23:18,765 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:23:18,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-19 07:23:21,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-19 07:23:21,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:23:21,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-19 07:23:21,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-19 07:23:21,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:23:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-19 07:23:23,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241773828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:23:23,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1483923992] [2022-11-19 07:23:23,098 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:23:23,098 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:23:23,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:23:23,099 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:23:23,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:23:23,166 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:23:23,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23513#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:23:23,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:23:23,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:23:23,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 68 [2022-11-19 07:23:23,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406593718] [2022-11-19 07:23:23,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:23:23,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-19 07:23:23,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:23,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-19 07:23:23,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=4535, Unknown=0, NotChecked=0, Total=5112 [2022-11-19 07:23:23,504 INFO L87 Difference]: Start difference. First operand 175 states and 201 transitions. Second operand has 68 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 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) [2022-11-19 07:23:36,673 WARN L233 SmtUtils]: Spent 7.02s on a formula simplification. DAG size of input: 72 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:24:06,870 WARN L233 SmtUtils]: Spent 11.53s on a formula simplification. DAG size of input: 71 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:24:18,089 WARN L233 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 66 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:24:37,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:37,179 INFO L93 Difference]: Finished difference Result 313 states and 360 transitions. [2022-11-19 07:24:37,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-19 07:24:37,180 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 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) Word has length 44 [2022-11-19 07:24:37,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:37,181 INFO L225 Difference]: With dead ends: 313 [2022-11-19 07:24:37,181 INFO L226 Difference]: Without dead ends: 218 [2022-11-19 07:24:37,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 68.6s TimeCoverageRelationStatistics Valid=885, Invalid=6425, Unknown=0, NotChecked=0, Total=7310 [2022-11-19 07:24:37,182 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 38 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 2267 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 2390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:37,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 72 Invalid, 2390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2267 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-19 07:24:37,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-11-19 07:24:37,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 196. [2022-11-19 07:24:37,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.1487179487179486) internal successors, (224), 195 states have internal predecessors, (224), 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) [2022-11-19 07:24:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 224 transitions. [2022-11-19 07:24:37,552 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 224 transitions. Word has length 44 [2022-11-19 07:24:37,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:37,552 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 224 transitions. [2022-11-19 07:24:37,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 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) [2022-11-19 07:24:37,552 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 224 transitions. [2022-11-19 07:24:37,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:24:37,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:37,553 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:37,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:37,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:37,754 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:37,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:37,754 INFO L85 PathProgramCache]: Analyzing trace with hash -860619069, now seen corresponding path program 33 times [2022-11-19 07:24:37,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:37,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987379731] [2022-11-19 07:24:37,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:37,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-19 07:24:38,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:38,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987379731] [2022-11-19 07:24:38,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987379731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:24:38,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766148002] [2022-11-19 07:24:38,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:24:38,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:38,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:38,407 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:38,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-19 07:24:38,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:24:38,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:24:38,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 07:24:38,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-19 07:24:38,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:24:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-19 07:24:38,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766148002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:24:38,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [269692293] [2022-11-19 07:24:38,668 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:24:38,668 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:24:38,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:24:38,669 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:24:38,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:24:38,722 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:24:38,887 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24831#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:24:38,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:24:38,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:24:38,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 18 [2022-11-19 07:24:38,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523759652] [2022-11-19 07:24:38,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:24:38,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:24:38,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:38,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:24:38,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:24:38,890 INFO L87 Difference]: Start difference. First operand 196 states and 224 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 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) [2022-11-19 07:24:40,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:40,217 INFO L93 Difference]: Finished difference Result 322 states and 356 transitions. [2022-11-19 07:24:40,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:24:40,218 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 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 45 [2022-11-19 07:24:40,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:40,220 INFO L225 Difference]: With dead ends: 322 [2022-11-19 07:24:40,220 INFO L226 Difference]: Without dead ends: 305 [2022-11-19 07:24:40,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:24:40,221 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:40,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 62 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:24:40,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-11-19 07:24:40,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 210. [2022-11-19 07:24:40,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.1483253588516746) internal successors, (240), 209 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) [2022-11-19 07:24:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 240 transitions. [2022-11-19 07:24:40,612 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 240 transitions. Word has length 45 [2022-11-19 07:24:40,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:40,612 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 240 transitions. [2022-11-19 07:24:40,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 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) [2022-11-19 07:24:40,613 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 240 transitions. [2022-11-19 07:24:40,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:24:40,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:40,614 INFO L195 NwaCegarLoop]: trace histogram [19, 15, 7, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:40,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:40,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-19 07:24:40,814 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:40,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:40,814 INFO L85 PathProgramCache]: Analyzing trace with hash -868692605, now seen corresponding path program 34 times [2022-11-19 07:24:40,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:40,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148305124] [2022-11-19 07:24:40,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:40,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-19 07:24:41,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:41,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148305124] [2022-11-19 07:24:41,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148305124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:24:41,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360539057] [2022-11-19 07:24:41,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:24:41,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:41,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:41,651 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:41,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-19 07:24:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:41,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-19 07:24:41,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-19 07:24:42,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:24:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 64 proven. 56 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-11-19 07:24:43,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360539057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:24:43,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [811967658] [2022-11-19 07:24:43,126 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:24:43,126 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:24:43,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:24:43,126 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:24:43,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:24:43,182 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:24:43,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26217#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:24:43,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:24:43,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:24:43,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 18] total 54 [2022-11-19 07:24:43,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650170737] [2022-11-19 07:24:43,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:24:43,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-19 07:24:43,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:43,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-19 07:24:43,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=2982, Unknown=0, NotChecked=0, Total=3306 [2022-11-19 07:24:43,480 INFO L87 Difference]: Start difference. First operand 210 states and 240 transitions. Second operand has 54 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 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) [2022-11-19 07:25:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:36,963 INFO L93 Difference]: Finished difference Result 320 states and 369 transitions. [2022-11-19 07:25:36,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-11-19 07:25:36,964 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 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 47 [2022-11-19 07:25:36,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:36,965 INFO L225 Difference]: With dead ends: 320 [2022-11-19 07:25:36,966 INFO L226 Difference]: Without dead ends: 274 [2022-11-19 07:25:36,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6070 ImplicationChecksByTransitivity, 50.6s TimeCoverageRelationStatistics Valid=1824, Invalid=21738, Unknown=0, NotChecked=0, Total=23562 [2022-11-19 07:25:36,967 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 118 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 3357 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 3602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 3357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:36,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 68 Invalid, 3602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 3357 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-19 07:25:36,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-19 07:25:37,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 238. [2022-11-19 07:25:37,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.130801687763713) internal successors, (268), 237 states have internal predecessors, (268), 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) [2022-11-19 07:25:37,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 268 transitions. [2022-11-19 07:25:37,507 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 268 transitions. Word has length 47 [2022-11-19 07:25:37,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:37,508 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 268 transitions. [2022-11-19 07:25:37,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 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) [2022-11-19 07:25:37,508 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 268 transitions. [2022-11-19 07:25:37,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:25:37,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:37,509 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:37,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:37,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-19 07:25:37,714 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:37,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:37,714 INFO L85 PathProgramCache]: Analyzing trace with hash -356283211, now seen corresponding path program 35 times [2022-11-19 07:25:37,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:37,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209313420] [2022-11-19 07:25:37,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:37,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-19 07:25:38,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:38,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209313420] [2022-11-19 07:25:38,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209313420] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:38,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15409630] [2022-11-19 07:25:38,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:25:38,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:38,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:38,579 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:38,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-19 07:25:40,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-19 07:25:40,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:25:40,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-19 07:25:40,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-19 07:25:40,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-19 07:25:42,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15409630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:42,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [781606061] [2022-11-19 07:25:42,424 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:25:42,424 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:25:42,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:25:42,424 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:25:42,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:25:42,483 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:25:42,879 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27864#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:25:42,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:25:42,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:25:42,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 73 [2022-11-19 07:25:42,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244708994] [2022-11-19 07:25:42,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:42,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-19 07:25:42,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:42,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-19 07:25:42,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=648, Invalid=5204, Unknown=0, NotChecked=0, Total=5852 [2022-11-19 07:25:42,882 INFO L87 Difference]: Start difference. First operand 238 states and 268 transitions. Second operand has 73 states, 73 states have (on average 1.095890410958904) internal successors, (80), 73 states have internal predecessors, (80), 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) [2022-11-19 07:26:07,901 WARN L233 SmtUtils]: Spent 11.40s on a formula simplification. DAG size of input: 77 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:26:25,098 WARN L233 SmtUtils]: Spent 6.36s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:26:48,329 WARN L233 SmtUtils]: Spent 15.05s on a formula simplification. DAG size of input: 76 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:27:03,061 WARN L233 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 71 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:27:06,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 07:27:22,586 WARN L233 SmtUtils]: Spent 8.49s on a formula simplification. DAG size of input: 66 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:27:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:37,669 INFO L93 Difference]: Finished difference Result 339 states and 385 transitions. [2022-11-19 07:27:37,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-19 07:27:37,669 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.095890410958904) internal successors, (80), 73 states have internal predecessors, (80), 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 47 [2022-11-19 07:27:37,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:37,671 INFO L225 Difference]: With dead ends: 339 [2022-11-19 07:27:37,671 INFO L226 Difference]: Without dead ends: 266 [2022-11-19 07:27:37,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2114 ImplicationChecksByTransitivity, 109.1s TimeCoverageRelationStatistics Valid=1284, Invalid=9634, Unknown=2, NotChecked=0, Total=10920 [2022-11-19 07:27:37,673 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 73 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 2938 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:37,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 76 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 2938 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-11-19 07:27:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-19 07:27:38,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 243. [2022-11-19 07:27:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.1198347107438016) internal successors, (271), 242 states have internal predecessors, (271), 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) [2022-11-19 07:27:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 271 transitions. [2022-11-19 07:27:38,145 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 271 transitions. Word has length 47 [2022-11-19 07:27:38,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:38,145 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 271 transitions. [2022-11-19 07:27:38,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.095890410958904) internal successors, (80), 73 states have internal predecessors, (80), 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) [2022-11-19 07:27:38,146 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 271 transitions. [2022-11-19 07:27:38,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 07:27:38,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:38,147 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:38,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:38,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-19 07:27:38,354 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:38,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:38,354 INFO L85 PathProgramCache]: Analyzing trace with hash -818530933, now seen corresponding path program 36 times [2022-11-19 07:27:38,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:38,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736263659] [2022-11-19 07:27:38,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:38,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-19 07:27:39,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:39,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736263659] [2022-11-19 07:27:39,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736263659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:39,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28682646] [2022-11-19 07:27:39,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:27:39,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:39,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:39,106 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:39,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-19 07:27:39,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:27:39,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:39,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-19 07:27:39,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-19 07:27:39,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-19 07:27:39,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28682646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:39,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [744014186] [2022-11-19 07:27:39,397 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:27:39,397 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:39,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:39,398 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:39,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:39,454 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:39,627 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29375#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:27:39,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:39,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:39,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 19 [2022-11-19 07:27:39,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334665592] [2022-11-19 07:27:39,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:39,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:27:39,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:39,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:27:39,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:27:39,629 INFO L87 Difference]: Start difference. First operand 243 states and 271 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2022-11-19 07:27:41,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:41,138 INFO L93 Difference]: Finished difference Result 362 states and 395 transitions. [2022-11-19 07:27:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:27:41,138 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 48 [2022-11-19 07:27:41,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:41,140 INFO L225 Difference]: With dead ends: 362 [2022-11-19 07:27:41,140 INFO L226 Difference]: Without dead ends: 344 [2022-11-19 07:27:41,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:27:41,141 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:41,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 97 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:27:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-19 07:27:41,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2022-11-19 07:27:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.12015503875969) internal successors, (289), 258 states have internal predecessors, (289), 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) [2022-11-19 07:27:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 289 transitions. [2022-11-19 07:27:41,663 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 289 transitions. Word has length 48 [2022-11-19 07:27:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:41,663 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 289 transitions. [2022-11-19 07:27:41,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2022-11-19 07:27:41,663 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 289 transitions. [2022-11-19 07:27:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 07:27:41,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:41,665 INFO L195 NwaCegarLoop]: trace histogram [20, 13, 11, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:41,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:41,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-19 07:27:41,880 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:41,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:41,880 INFO L85 PathProgramCache]: Analyzing trace with hash 65687938, now seen corresponding path program 37 times [2022-11-19 07:27:41,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:41,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536779822] [2022-11-19 07:27:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:41,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-19 07:27:42,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:42,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536779822] [2022-11-19 07:27:42,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536779822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:42,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245613706] [2022-11-19 07:27:42,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:27:42,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:42,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:42,964 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:42,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-19 07:27:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:43,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-19 07:27:43,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-19 07:27:43,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 24 proven. 132 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-11-19 07:27:45,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245613706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:45,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1125236695] [2022-11-19 07:27:45,348 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:27:45,348 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:45,349 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:45,349 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:45,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:45,406 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:45,771 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30971#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:27:45,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:45,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:45,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 26] total 71 [2022-11-19 07:27:45,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706576464] [2022-11-19 07:27:45,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:45,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-19 07:27:45,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:45,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-19 07:27:45,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=5000, Unknown=0, NotChecked=0, Total=5550 [2022-11-19 07:27:45,774 INFO L87 Difference]: Start difference. First operand 259 states and 289 transitions. Second operand has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 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) [2022-11-19 07:29:21,106 WARN L233 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 67 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:29:30,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 07:30:05,270 WARN L233 SmtUtils]: Spent 7.61s on a formula simplification. DAG size of input: 67 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:30:18,643 WARN L233 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 67 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:30:32,549 WARN L233 SmtUtils]: Spent 5.75s on a formula simplification. DAG size of input: 67 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:31:25,872 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 67 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:31:27,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:27,565 INFO L93 Difference]: Finished difference Result 403 states and 481 transitions. [2022-11-19 07:31:27,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2022-11-19 07:31:27,566 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-19 07:31:27,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:27,568 INFO L225 Difference]: With dead ends: 403 [2022-11-19 07:31:27,568 INFO L226 Difference]: Without dead ends: 337 [2022-11-19 07:31:27,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15197 ImplicationChecksByTransitivity, 206.7s TimeCoverageRelationStatistics Valid=3533, Invalid=49136, Unknown=1, NotChecked=0, Total=52670 [2022-11-19 07:31:27,574 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 200 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 5588 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 5990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 5588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:27,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 154 Invalid, 5990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 5588 Invalid, 0 Unknown, 0 Unchecked, 17.1s Time] [2022-11-19 07:31:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-11-19 07:31:28,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 312. [2022-11-19 07:31:28,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.1157556270096463) internal successors, (347), 311 states have internal predecessors, (347), 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) [2022-11-19 07:31:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 347 transitions. [2022-11-19 07:31:28,273 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 347 transitions. Word has length 50 [2022-11-19 07:31:28,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:28,273 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 347 transitions. [2022-11-19 07:31:28,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 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) [2022-11-19 07:31:28,273 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 347 transitions. [2022-11-19 07:31:28,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-19 07:31:28,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:28,274 INFO L195 NwaCegarLoop]: trace histogram [21, 16, 8, 1, 1, 1, 1, 1, 1] [2022-11-19 07:31:28,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-19 07:31:28,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-19 07:31:28,480 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:28,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:28,480 INFO L85 PathProgramCache]: Analyzing trace with hash 499981836, now seen corresponding path program 38 times [2022-11-19 07:31:28,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:28,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734965388] [2022-11-19 07:31:28,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:28,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-19 07:31:29,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:29,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734965388] [2022-11-19 07:31:29,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734965388] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:29,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049473433] [2022-11-19 07:31:29,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:31:29,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:29,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:29,430 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:29,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6703fc09-1cdc-4c53-a307-0b7fe7d4d954/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-19 07:31:31,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-19 07:31:31,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:31:31,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-19 07:31:31,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-19 07:31:32,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-19 07:31:35,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049473433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:31:35,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1023078058] [2022-11-19 07:31:35,335 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:31:35,335 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:31:35,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:31:35,335 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:31:35,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:31:35,388 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:31:35,813 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33086#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:31:35,813 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:31:35,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:31:35,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28, 28] total 85 [2022-11-19 07:31:35,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873749303] [2022-11-19 07:31:35,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:31:35,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-11-19 07:31:35,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:35,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-11-19 07:31:35,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1407, Invalid=6425, Unknown=0, NotChecked=0, Total=7832 [2022-11-19 07:31:35,816 INFO L87 Difference]: Start difference. First operand 312 states and 347 transitions. Second operand has 85 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 85 states have internal predecessors, (92), 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)