./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy9_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy9_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V --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 904ada5b631ac9ba69e93f7c5eb51a71b3a5f4ed245a1ea57aa3fec5e9b98c37 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:06:55,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:06:55,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:06:55,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:06:55,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:06:55,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:06:55,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:06:55,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:06:55,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:06:55,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:06:55,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:06:55,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:06:55,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:06:55,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:06:55,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:06:55,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:06:55,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:06:55,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:06:55,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:06:55,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:06:55,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:06:55,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:06:55,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:06:55,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:06:56,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:06:56,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:06:56,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:06:56,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:06:56,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:06:56,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:06:56,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:06:56,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:06:56,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:06:56,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:06:56,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:06:56,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:06:56,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:06:56,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:06:56,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:06:56,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:06:56,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:06:56,025 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:06:56,084 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:06:56,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:06:56,085 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:06:56,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:06:56,086 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:06:56,086 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:06:56,087 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:06:56,087 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:06:56,087 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:06:56,088 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:06:56,088 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:06:56,088 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:06:56,088 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:06:56,089 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:06:56,089 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:06:56,089 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:06:56,090 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:06:56,090 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:06:56,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:06:56,091 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:06:56,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:06:56,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:06:56,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:06:56,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:06:56,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:06:56,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:06:56,093 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:06:56,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:06:56,094 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:06:56,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:06:56,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:06:56,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:06:56,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:06:56,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:06:56,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:06:56,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:06:56,097 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:06:56,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:06:56,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:06:56,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:06:56,098 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:06:56,098 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 904ada5b631ac9ba69e93f7c5eb51a71b3a5f4ed245a1ea57aa3fec5e9b98c37 [2021-11-23 02:06:56,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:06:56,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:06:56,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:06:56,416 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:06:56,417 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:06:56,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-examples/standard_copy9_ground-1.i [2021-11-23 02:06:56,556 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/data/0a36ec955/3e04d4536875431ab06ae4678c1d8f82/FLAGb8b9b20bf [2021-11-23 02:06:57,137 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:06:57,142 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/sv-benchmarks/c/array-examples/standard_copy9_ground-1.i [2021-11-23 02:06:57,158 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/data/0a36ec955/3e04d4536875431ab06ae4678c1d8f82/FLAGb8b9b20bf [2021-11-23 02:06:57,447 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/data/0a36ec955/3e04d4536875431ab06ae4678c1d8f82 [2021-11-23 02:06:57,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:06:57,452 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:06:57,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:06:57,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:06:57,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:06:57,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:57" (1/1) ... [2021-11-23 02:06:57,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1669d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:57, skipping insertion in model container [2021-11-23 02:06:57,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:57" (1/1) ... [2021-11-23 02:06:57,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:06:57,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:06:57,722 WARN L230 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_be523159-8aa2-4ac1-a567-087307aaf0de/sv-benchmarks/c/array-examples/standard_copy9_ground-1.i[816,829] [2021-11-23 02:06:57,751 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:06:57,760 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:06:57,776 WARN L230 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_be523159-8aa2-4ac1-a567-087307aaf0de/sv-benchmarks/c/array-examples/standard_copy9_ground-1.i[816,829] [2021-11-23 02:06:57,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:06:57,811 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:06:57,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:57 WrapperNode [2021-11-23 02:06:57,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:06:57,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:06:57,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:06:57,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:06:57,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:57" (1/1) ... [2021-11-23 02:06:57,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:57" (1/1) ... [2021-11-23 02:06:57,869 INFO L137 Inliner]: procedures = 16, calls = 59, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 195 [2021-11-23 02:06:57,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:06:57,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:06:57,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:06:57,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:06:57,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:57" (1/1) ... [2021-11-23 02:06:57,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:57" (1/1) ... [2021-11-23 02:06:57,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:57" (1/1) ... [2021-11-23 02:06:57,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:57" (1/1) ... [2021-11-23 02:06:57,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:57" (1/1) ... [2021-11-23 02:06:57,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:57" (1/1) ... [2021-11-23 02:06:57,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:57" (1/1) ... [2021-11-23 02:06:57,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:06:57,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:06:57,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:06:57,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:06:57,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:57" (1/1) ... [2021-11-23 02:06:57,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:06:57,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:57,958 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:06:57,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:06:58,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:06:58,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:06:58,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:06:58,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:06:58,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:06:58,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:06:58,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:06:58,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:06:58,104 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:06:58,106 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:06:58,414 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:06:58,496 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:06:58,496 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-23 02:06:58,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:58 BoogieIcfgContainer [2021-11-23 02:06:58,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:06:58,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:06:58,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:06:58,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:06:58,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:06:57" (1/3) ... [2021-11-23 02:06:58,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61db327a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:06:58, skipping insertion in model container [2021-11-23 02:06:58,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:57" (2/3) ... [2021-11-23 02:06:58,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61db327a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:06:58, skipping insertion in model container [2021-11-23 02:06:58,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:58" (3/3) ... [2021-11-23 02:06:58,537 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-1.i [2021-11-23 02:06:58,544 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:06:58,544 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:06:58,608 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:06:58,618 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:06:58,619 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:06:58,637 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.8666666666666667) 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) [2021-11-23 02:06:58,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 02:06:58,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:58,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:58,646 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:58,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:58,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1505914239, now seen corresponding path program 1 times [2021-11-23 02:06:58,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:58,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909683560] [2021-11-23 02:06:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:58,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:06:59,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:59,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909683560] [2021-11-23 02:06:59,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909683560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:59,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:59,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:06:59,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538932915] [2021-11-23 02:06:59,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:59,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:06:59,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:59,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:06:59,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:06:59,047 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.8666666666666667) 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) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 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) [2021-11-23 02:06:59,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:59,145 INFO L93 Difference]: Finished difference Result 33 states and 55 transitions. [2021-11-23 02:06:59,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:06:59,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 02:06:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:59,156 INFO L225 Difference]: With dead ends: 33 [2021-11-23 02:06:59,157 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 02:06:59,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:06:59,164 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:59,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:06:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 02:06:59,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 02:06:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 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) [2021-11-23 02:06:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2021-11-23 02:06:59,201 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 14 [2021-11-23 02:06:59,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:59,202 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2021-11-23 02:06:59,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 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) [2021-11-23 02:06:59,203 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2021-11-23 02:06:59,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 02:06:59,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:59,204 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:59,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:06:59,205 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:59,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:59,206 INFO L85 PathProgramCache]: Analyzing trace with hash 80859531, now seen corresponding path program 1 times [2021-11-23 02:06:59,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:59,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257283558] [2021-11-23 02:06:59,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:59,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:06:59,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:59,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257283558] [2021-11-23 02:06:59,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257283558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:59,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457745677] [2021-11-23 02:06:59,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:59,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:59,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:59,286 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:59,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:06:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:59,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:06:59,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:06:59,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:06:59,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457745677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:59,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:06:59,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 02:06:59,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706810261] [2021-11-23 02:06:59,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:59,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:06:59,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:59,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:06:59,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:06:59,510 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-11-23 02:06:59,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:59,641 INFO L93 Difference]: Finished difference Result 39 states and 66 transitions. [2021-11-23 02:06:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:06:59,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 [2021-11-23 02:06:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:59,645 INFO L225 Difference]: With dead ends: 39 [2021-11-23 02:06:59,647 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 02:06:59,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:06:59,651 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:59,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:06:59,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 02:06:59,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-23 02:06:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2021-11-23 02:06:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-11-23 02:06:59,666 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 15 [2021-11-23 02:06:59,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:59,666 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-11-23 02:06:59,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-11-23 02:06:59,668 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-11-23 02:06:59,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 02:06:59,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:59,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:59,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:59,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:59,881 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:59,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:59,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1229820764, now seen corresponding path program 1 times [2021-11-23 02:06:59,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:59,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333426564] [2021-11-23 02:06:59,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:59,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:06:59,984 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:59,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333426564] [2021-11-23 02:06:59,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333426564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:59,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040765991] [2021-11-23 02:06:59,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:59,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:59,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:59,987 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:00,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:07:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:00,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:07:00,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:07:00,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:07:00,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040765991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:00,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [103379723] [2021-11-23 02:07:00,422 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:07:00,433 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:07:00,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:07:00,450 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:07:00,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:07:00,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:00,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,686 INFO L354 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2021-11-23 02:07:01,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2021-11-23 02:07:01,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:03,211 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:07:03,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:07:03,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:03,538 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:07:03,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:07:03,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:03,731 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:07:03,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:07:03,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:03,879 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:03,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:04,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:04,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:04,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:04,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:04,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:04,141 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:04,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:04,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:04,244 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:04,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:04,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:04,316 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:04,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:04,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:04,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:04,504 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:07:04,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 74 [2021-11-23 02:07:04,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:04,667 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:04,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:04,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:04,758 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:04,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:04,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:04,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:04,976 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:07:04,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 74 [2021-11-23 02:07:05,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:05,127 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:05,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:05,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:05,210 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:05,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:05,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:05,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:05,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:05,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:05,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:05,372 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:05,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:05,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:05,453 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:05,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:05,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:05,538 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:05,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:05,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:05,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:05,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:05,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:05,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:05,656 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:05,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:05,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:05,763 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:05,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:05,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:05,834 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:05,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:05,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:05,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:05,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:05,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:05,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:05,959 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:05,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:06,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:06,041 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:06,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:06,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:06,112 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:06,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:06,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:06,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:06,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:06,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:06,265 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:06,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:06,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:06,351 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:06,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:06,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:06,437 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:06,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:06,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:06,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:06,612 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:06,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:07:06,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:06,701 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:06,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:06,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:06,791 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:06,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:06,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:06,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:06,946 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:06,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:07:07,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:07,061 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:07,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:07,129 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:07:07,798 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '415#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (<= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.offset|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.offset|) (<= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a7~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.offset|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#a4~0#1.offset|) (<= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:07:07,799 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:07:07,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:07:07,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-23 02:07:07,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530131268] [2021-11-23 02:07:07,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:07:07,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:07:07,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:07,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:07:07,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:07:07,802 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-11-23 02:07:07,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:07,912 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2021-11-23 02:07:07,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:07:07,915 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 24 [2021-11-23 02:07:07,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:07,915 INFO L225 Difference]: With dead ends: 52 [2021-11-23 02:07:07,916 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 02:07:07,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:07:07,921 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:07,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:07:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 02:07:07,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-23 02:07:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-11-23 02:07:07,934 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2021-11-23 02:07:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:07,935 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-11-23 02:07:07,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-11-23 02:07:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-11-23 02:07:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 02:07:07,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:07,936 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:07,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:08,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:08,137 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:07:08,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:08,137 INFO L85 PathProgramCache]: Analyzing trace with hash -911678298, now seen corresponding path program 2 times [2021-11-23 02:07:08,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:08,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494369512] [2021-11-23 02:07:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:08,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:08,228 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:07:08,228 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:08,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494369512] [2021-11-23 02:07:08,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494369512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:08,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853237083] [2021-11-23 02:07:08,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:07:08,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:08,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:08,237 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:08,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:07:08,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:07:08,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:07:08,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:07:08,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:07:08,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:07:08,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853237083] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:08,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1517084277] [2021-11-23 02:07:08,492 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:07:08,509 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:07:08,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:07:08,509 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:07:08,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:07:08,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:08,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:08,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:08,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:08,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:08,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:08,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:08,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:08,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:08,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:09,469 INFO L354 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2021-11-23 02:07:09,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2021-11-23 02:07:09,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:09,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:09,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:09,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:09,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:09,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:09,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:09,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:09,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:09,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:10,724 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:07:10,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:07:10,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:10,876 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:07:10,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:07:10,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:10,957 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:07:10,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:07:11,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:11,046 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:11,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:11,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:11,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:11,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:11,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:11,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:11,148 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:11,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:11,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:11,228 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:11,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:11,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:11,292 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:11,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:11,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:11,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:11,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:11,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:11,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:11,399 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:11,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:11,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:11,485 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:11,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:11,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:11,555 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:11,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:11,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:11,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:11,697 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:11,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:07:11,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:11,792 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:11,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:11,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:11,855 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:11,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:11,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:11,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:11,986 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:11,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:07:12,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:12,087 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:12,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:12,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:12,175 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:12,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:12,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:12,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:12,332 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:12,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:07:12,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:12,436 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:12,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:12,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:12,505 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:12,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:12,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:12,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:12,652 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:12,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:07:12,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:12,734 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:12,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:12,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:12,821 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:12,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:12,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:12,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:12,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:12,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:12,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:12,937 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:12,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:12,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:13,010 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:13,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:13,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:13,080 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:13,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:13,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:13,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:13,245 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:13,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:07:13,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:13,320 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:13,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:13,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:13,386 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:13,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:13,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:13,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:13,525 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:13,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:07:13,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:13,618 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:13,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:13,673 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:07:14,250 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '731#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (<= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.offset|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.offset|) (<= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a7~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.offset|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#a4~0#1.offset|) (<= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:07:14,250 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:07:14,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:07:14,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 02:07:14,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559058835] [2021-11-23 02:07:14,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:07:14,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:07:14,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:14,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:07:14,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:07:14,253 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:14,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:14,434 INFO L93 Difference]: Finished difference Result 77 states and 122 transitions. [2021-11-23 02:07:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:07:14,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 02:07:14,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:14,436 INFO L225 Difference]: With dead ends: 77 [2021-11-23 02:07:14,436 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 02:07:14,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:07:14,439 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:14,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:07:14,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 02:07:14,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-23 02:07:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:14,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-11-23 02:07:14,450 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 27 [2021-11-23 02:07:14,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:14,450 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-11-23 02:07:14,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:14,451 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-11-23 02:07:14,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:07:14,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:14,453 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:14,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:14,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:14,673 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:07:14,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:14,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2146685505, now seen corresponding path program 3 times [2021-11-23 02:07:14,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:14,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805572139] [2021-11-23 02:07:14,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:14,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:07:14,878 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:14,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805572139] [2021-11-23 02:07:14,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805572139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:14,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714245587] [2021-11-23 02:07:14,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:07:14,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:14,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:14,893 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:14,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:07:15,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:07:15,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:07:15,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:07:15,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:07:15,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:07:15,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714245587] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:15,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1899017556] [2021-11-23 02:07:15,314 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:07:15,314 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:07:15,315 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:07:15,315 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:07:15,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:07:15,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:15,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:15,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:15,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:15,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:15,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:15,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:15,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:15,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:15,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:16,129 INFO L354 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2021-11-23 02:07:16,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2021-11-23 02:07:16,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:16,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:16,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:16,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:16,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:16,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:16,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:16,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:16,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:16,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:17,201 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:07:17,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:07:17,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:17,324 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:07:17,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:07:17,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:17,413 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:07:17,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:07:17,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:17,492 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:17,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:17,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:17,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:17,651 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:17,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:07:17,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:17,749 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:17,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:17,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:17,825 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:17,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:17,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:17,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:17,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:17,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:17,926 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:17,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:17,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:17,991 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:17,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:18,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:18,058 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:18,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:18,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:18,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:18,206 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:18,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:07:18,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:18,307 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:18,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:18,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:18,367 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:18,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:18,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:18,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:18,526 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:07:18,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 74 [2021-11-23 02:07:18,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:18,633 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:18,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:18,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:18,699 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:18,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:18,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:18,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:18,828 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:18,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:07:18,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:18,926 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:18,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:18,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:18,998 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:18,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:19,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:19,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:19,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:19,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:19,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:19,097 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:19,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:19,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:19,179 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:19,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:19,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:19,235 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:19,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:19,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:19,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:19,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:19,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:19,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:19,341 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:19,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:19,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:19,416 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:19,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:19,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:19,472 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:19,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:19,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:19,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:19,581 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:07:19,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 74 [2021-11-23 02:07:19,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:19,687 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:19,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:19,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:19,743 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:19,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:19,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:19,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:19,849 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:19,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:07:19,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:19,930 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:19,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:19,987 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:07:20,516 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1319#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (<= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.offset|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.offset|) (<= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a7~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.offset|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#a4~0#1.offset|) (<= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:07:20,516 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:07:20,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:07:20,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-23 02:07:20,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723474877] [2021-11-23 02:07:20,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:07:20,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:07:20,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:20,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:07:20,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:07:20,519 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-11-23 02:07:20,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:20,622 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2021-11-23 02:07:20,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:07:20,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 54 [2021-11-23 02:07:20,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:20,623 INFO L225 Difference]: With dead ends: 112 [2021-11-23 02:07:20,624 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 02:07:20,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:07:20,625 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:20,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:07:20,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 02:07:20,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-23 02:07:20,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-11-23 02:07:20,646 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 54 [2021-11-23 02:07:20,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:20,647 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-11-23 02:07:20,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-11-23 02:07:20,647 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-11-23 02:07:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 02:07:20,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:20,654 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:20,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:20,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:20,877 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:07:20,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:20,878 INFO L85 PathProgramCache]: Analyzing trace with hash -789133823, now seen corresponding path program 4 times [2021-11-23 02:07:20,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:20,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462180814] [2021-11-23 02:07:20,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:20,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:07:21,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:21,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462180814] [2021-11-23 02:07:21,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462180814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:21,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172909] [2021-11-23 02:07:21,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:07:21,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:21,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:21,162 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:21,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:07:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:21,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:07:21,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:07:21,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:07:21,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:21,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [841104603] [2021-11-23 02:07:21,788 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:07:21,788 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:07:21,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:07:21,789 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:07:21,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:07:21,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:21,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:21,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:21,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:21,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:21,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:21,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:21,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:21,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:21,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,110 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:07:23,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:07:23,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2021-11-23 02:07:23,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2021-11-23 02:07:23,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:23,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:23,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:24,082 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:07:24,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 1060 treesize of output 1028 [2021-11-23 02:07:24,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:24,433 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:07:24,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:07:24,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:24,484 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:24,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:24,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:24,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:24,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:24,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:24,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:24,573 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:24,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2021-11-23 02:07:24,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:24,644 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:24,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:24,688 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:24,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:24,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:24,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:24,810 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:24,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2021-11-23 02:07:24,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:24,947 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:24,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:24,991 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:24,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:25,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:25,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:25,119 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:25,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2021-11-23 02:07:25,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:25,247 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:25,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:25,293 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:25,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:25,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:25,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:25,416 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:07:25,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2021-11-23 02:07:25,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:25,535 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:25,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:25,579 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:25,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:25,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:25,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:25,681 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:25,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2021-11-23 02:07:25,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:25,821 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:25,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:25,866 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:25,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:25,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:25,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:25,992 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:25,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2021-11-23 02:07:26,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:26,112 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:26,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:26,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:26,154 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:26,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:26,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:26,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:26,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:26,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:26,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:26,237 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:26,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2021-11-23 02:07:26,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:26,313 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:26,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:26,366 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:26,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:26,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:26,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:26,494 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:26,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2021-11-23 02:07:26,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:26,586 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:26,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:26,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:26,641 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:26,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:26,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:26,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:26,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:26,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:26,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:26,734 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:26,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2021-11-23 02:07:26,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:26,811 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:26,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:26,857 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:07:27,283 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2037#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:07:27,283 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:07:27,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:07:27,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-23 02:07:27,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680518476] [2021-11-23 02:07:27,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:07:27,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:07:27,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:27,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:07:27,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:07:27,287 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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) [2021-11-23 02:07:27,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:27,434 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2021-11-23 02:07:27,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 02:07:27,435 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 60 [2021-11-23 02:07:27,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:27,436 INFO L225 Difference]: With dead ends: 124 [2021-11-23 02:07:27,436 INFO L226 Difference]: Without dead ends: 74 [2021-11-23 02:07:27,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:07:27,439 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:27,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:07:27,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-23 02:07:27,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-23 02:07:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 73 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) [2021-11-23 02:07:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-11-23 02:07:27,451 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 60 [2021-11-23 02:07:27,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:27,451 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-11-23 02:07:27,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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) [2021-11-23 02:07:27,452 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-11-23 02:07:27,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 02:07:27,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:27,458 INFO L514 BasicCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:27,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:27,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 02:07:27,658 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:07:27,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:27,659 INFO L85 PathProgramCache]: Analyzing trace with hash 785857921, now seen corresponding path program 5 times [2021-11-23 02:07:27,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:27,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611775185] [2021-11-23 02:07:27,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:27,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:07:28,163 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:28,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611775185] [2021-11-23 02:07:28,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611775185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:28,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302180200] [2021-11-23 02:07:28,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:07:28,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:28,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:28,167 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:28,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:07:28,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:07:28,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:07:28,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:07:28,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-11-23 02:07:28,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:28,981 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-11-23 02:07:28,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302180200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:28,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2011028233] [2021-11-23 02:07:28,984 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:07:28,984 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:07:28,985 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:07:28,985 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:07:28,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:07:29,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,631 INFO L354 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2021-11-23 02:07:29,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2021-11-23 02:07:29,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:29,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:30,728 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:07:30,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:07:30,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:30,825 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:07:30,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:07:30,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:30,924 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:07:30,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:07:30,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:31,000 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:31,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:31,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:31,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:31,129 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:07:31,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 74 [2021-11-23 02:07:31,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:31,218 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:31,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:31,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:31,267 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:31,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:31,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:31,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:31,386 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:31,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:07:31,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:31,465 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:31,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:31,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:31,526 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:31,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:31,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:31,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:31,700 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:07:31,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 74 [2021-11-23 02:07:31,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:31,787 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:31,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:31,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:31,842 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:31,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:31,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:31,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:31,926 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:31,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:07:31,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:31,978 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:31,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:32,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,035 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:32,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:32,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:32,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:32,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,097 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:32,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:32,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,159 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:32,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:32,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,207 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:32,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:32,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:32,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:32,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:32,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,301 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:32,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:32,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,347 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:32,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:32,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,416 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:32,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:32,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:32,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:32,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,478 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:32,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:32,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,524 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:32,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:32,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,583 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:32,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:32,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:32,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:32,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:32,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,686 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:32,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:32,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,751 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:32,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:32,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,819 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:32,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:32,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:32,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:32,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:32,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,931 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:32,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:32,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:32,981 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:32,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:33,023 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:07:33,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2885#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (<= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.offset|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.offset|) (<= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a7~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.offset|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#a4~0#1.offset|) (<= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:07:33,648 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:07:33,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:07:33,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2021-11-23 02:07:33,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857449958] [2021-11-23 02:07:33,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:07:33,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 02:07:33,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:33,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 02:07:33,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 02:07:33,652 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2021-11-23 02:07:34,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:34,128 INFO L93 Difference]: Finished difference Result 179 states and 253 transitions. [2021-11-23 02:07:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 02:07:34,129 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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 72 [2021-11-23 02:07:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:34,133 INFO L225 Difference]: With dead ends: 179 [2021-11-23 02:07:34,133 INFO L226 Difference]: Without dead ends: 129 [2021-11-23 02:07:34,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 02:07:34,136 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:34,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:07:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-23 02:07:34,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-23 02:07:34,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0859375) internal successors, (139), 128 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2021-11-23 02:07:34,177 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 72 [2021-11-23 02:07:34,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:34,180 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2021-11-23 02:07:34,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2021-11-23 02:07:34,180 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2021-11-23 02:07:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-23 02:07:34,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:34,185 INFO L514 BasicCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:34,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:34,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:34,401 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:07:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:34,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1719339115, now seen corresponding path program 6 times [2021-11-23 02:07:34,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:34,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540441344] [2021-11-23 02:07:34,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:34,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-23 02:07:34,955 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:34,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540441344] [2021-11-23 02:07:34,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540441344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:34,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388972941] [2021-11-23 02:07:34,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:07:34,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:34,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:34,957 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:34,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:07:35,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:07:35,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:07:35,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 02:07:35,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-23 02:07:35,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-23 02:07:36,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388972941] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:36,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271306029] [2021-11-23 02:07:36,358 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:07:36,358 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:07:36,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:07:36,359 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:07:36,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:07:36,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:36,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:36,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:36,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:36,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:36,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:36,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:36,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:36,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:36,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:37,350 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:07:37,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:07:37,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:37,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:37,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:37,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:37,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:37,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:37,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:37,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:37,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:37,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:37,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2021-11-23 02:07:37,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:37,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:37,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-23 02:07:37,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:37,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:37,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:37,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:37,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:38,090 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 02:07:38,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 1040 treesize of output 1030 [2021-11-23 02:07:39,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:39,384 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:07:39,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:07:39,419 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:39,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:39,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:39,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:39,505 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:39,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2021-11-23 02:07:39,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:39,584 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:39,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:39,623 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:39,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:39,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:39,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:39,725 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:07:39,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2021-11-23 02:07:39,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:39,825 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:39,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:39,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:39,871 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:39,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:39,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:39,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:39,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:39,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:39,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:39,936 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:39,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2021-11-23 02:07:39,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:39,996 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:39,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:40,033 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:40,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:40,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:40,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:40,133 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:40,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2021-11-23 02:07:40,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:40,204 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:40,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:40,246 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:40,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:40,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:40,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:40,337 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:40,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2021-11-23 02:07:40,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:40,425 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:40,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:40,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:40,456 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:40,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:40,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:40,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:40,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:40,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:40,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:40,541 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:40,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2021-11-23 02:07:40,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:40,597 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:40,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:40,630 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:40,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:40,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:40,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:40,731 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:07:40,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2021-11-23 02:07:40,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:40,834 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:40,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:40,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:40,872 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:40,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:40,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:40,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:40,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:40,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:40,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:40,945 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:40,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2021-11-23 02:07:40,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:40,994 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:40,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:41,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:41,038 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:41,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:41,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:41,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:41,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:41,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:41,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:41,108 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:41,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2021-11-23 02:07:41,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:41,177 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:41,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:41,210 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:07:41,626 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4299#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:07:41,626 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:07:41,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:07:41,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2021-11-23 02:07:41,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958010456] [2021-11-23 02:07:41,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:07:41,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 02:07:41,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:41,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 02:07:41,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 02:07:41,631 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 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) [2021-11-23 02:07:41,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:41,860 INFO L93 Difference]: Finished difference Result 258 states and 302 transitions. [2021-11-23 02:07:41,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 02:07:41,861 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 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) Word has length 127 [2021-11-23 02:07:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:41,862 INFO L225 Difference]: With dead ends: 258 [2021-11-23 02:07:41,863 INFO L226 Difference]: Without dead ends: 154 [2021-11-23 02:07:41,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 02:07:41,866 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:41,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:07:41,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-23 02:07:41,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-11-23 02:07:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0718954248366013) internal successors, (164), 153 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2021-11-23 02:07:41,903 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 127 [2021-11-23 02:07:41,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:41,904 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2021-11-23 02:07:41,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 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) [2021-11-23 02:07:41,904 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2021-11-23 02:07:41,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-23 02:07:41,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:41,913 INFO L514 BasicCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:41,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:42,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:42,114 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:07:42,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:42,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1421957727, now seen corresponding path program 7 times [2021-11-23 02:07:42,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:42,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696064797] [2021-11-23 02:07:42,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:42,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-23 02:07:43,428 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:43,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696064797] [2021-11-23 02:07:43,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696064797] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:43,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351887053] [2021-11-23 02:07:43,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:07:43,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:43,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:43,433 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:43,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:07:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:43,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 02:07:43,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-23 02:07:43,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-23 02:07:46,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351887053] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:46,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [243977478] [2021-11-23 02:07:46,521 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:07:46,521 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:07:46,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:07:46,522 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:07:46,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:07:46,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:46,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:46,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:46,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:46,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:46,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:46,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:46,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:46,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:46,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:47,093 INFO L354 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2021-11-23 02:07:47,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2021-11-23 02:07:47,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:47,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:47,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:47,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:47,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:47,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:47,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:47,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:47,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:47,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:47,992 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:07:47,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:07:48,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:48,093 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:07:48,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:07:48,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:48,156 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:07:48,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:07:48,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:48,216 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:48,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:48,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:48,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:48,315 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:48,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:07:48,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:48,365 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:48,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:48,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:48,421 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:48,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:48,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:48,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:48,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:48,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:48,512 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:48,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:48,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:48,560 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:48,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:48,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:48,617 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:48,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:48,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:48,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:48,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:48,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:48,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:48,704 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:48,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:48,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:48,783 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:48,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:48,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:48,832 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:48,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:48,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:48,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:48,939 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:48,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:07:48,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,007 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:49,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:49,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,053 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:49,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:49,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:49,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:49,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:49,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,144 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:49,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:49,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,200 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:49,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:49,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,253 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:49,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:49,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:49,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:49,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:49,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,337 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:49,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:49,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,397 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:49,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:49,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,446 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:49,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:49,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,560 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:49,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:07:49,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,624 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:49,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:49,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,699 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:49,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:49,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:49,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:49,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:49,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,791 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:49,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:07:49,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,856 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:49,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:49,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,910 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:49,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:07:49,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:49,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:50,030 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:07:50,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 74 [2021-11-23 02:07:50,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:50,087 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:50,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:50,124 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:07:50,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6121#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (<= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.offset|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.offset|) (<= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a7~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.offset|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#a4~0#1.offset|) (<= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:07:50,833 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:07:50,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:07:50,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2021-11-23 02:07:50,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410602911] [2021-11-23 02:07:50,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:07:50,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-23 02:07:50,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:50,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-23 02:07:50,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2021-11-23 02:07:50,841 INFO L87 Difference]: Start difference. First operand 154 states and 164 transitions. Second operand has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:51,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:51,156 INFO L93 Difference]: Finished difference Result 308 states and 377 transitions. [2021-11-23 02:07:51,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-23 02:07:51,157 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 0 states have call successors, (0), 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 152 [2021-11-23 02:07:51,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:51,159 INFO L225 Difference]: With dead ends: 308 [2021-11-23 02:07:51,159 INFO L226 Difference]: Without dead ends: 204 [2021-11-23 02:07:51,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2021-11-23 02:07:51,168 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:51,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:07:51,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-23 02:07:51,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-11-23 02:07:51,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 203 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:51,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 214 transitions. [2021-11-23 02:07:51,184 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 214 transitions. Word has length 152 [2021-11-23 02:07:51,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:51,186 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 214 transitions. [2021-11-23 02:07:51,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:51,187 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 214 transitions. [2021-11-23 02:07:51,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-23 02:07:51,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:51,193 INFO L514 BasicCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:51,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:51,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:51,421 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:07:51,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:51,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1648874721, now seen corresponding path program 8 times [2021-11-23 02:07:51,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:51,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924479387] [2021-11-23 02:07:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:51,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-23 02:07:55,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:55,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924479387] [2021-11-23 02:07:55,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924479387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:55,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568674898] [2021-11-23 02:07:55,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:07:55,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:55,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:55,299 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:55,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:09:09,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 02:09:09,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:09:09,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:09:09,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5291 trivial. 0 not checked. [2021-11-23 02:09:09,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5291 trivial. 0 not checked. [2021-11-23 02:09:10,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568674898] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:09:10,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [597804866] [2021-11-23 02:09:10,452 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:09:10,452 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:09:10,453 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:09:10,453 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:09:10,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:09:10,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:10,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:10,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:10,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:10,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:10,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:10,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:10,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:10,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:10,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,313 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:09:11,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:09:11,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2021-11-23 02:09:11,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2021-11-23 02:09:11,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:11,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:11,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:11,898 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:09:11,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 1060 treesize of output 1028 [2021-11-23 02:09:12,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:12,159 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:09:12,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:09:12,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:12,199 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:12,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:12,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:12,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:12,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:12,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:12,269 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:09:12,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2021-11-23 02:09:12,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:12,323 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:12,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:12,354 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:09:12,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:09:12,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:12,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:12,442 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:09:12,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2021-11-23 02:09:12,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:12,496 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:12,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:12,521 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:09:12,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:09:12,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:12,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:12,599 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:09:12,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2021-11-23 02:09:12,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:12,694 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:12,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:12,728 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:09:12,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:09:12,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:12,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:12,829 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:09:12,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2021-11-23 02:09:12,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:12,918 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:12,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:12,954 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:09:12,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:09:13,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,079 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:09:13,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2021-11-23 02:09:13,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,134 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:13,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:13,181 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:09:13,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:09:13,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,278 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:09:13,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2021-11-23 02:09:13,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,373 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:13,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:13,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,409 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:13,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:13,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:13,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:13,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:13,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,480 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:09:13,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2021-11-23 02:09:13,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,544 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:13,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:13,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,578 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:13,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:13,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:13,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:13,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:13,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,653 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:09:13,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2021-11-23 02:09:13,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,717 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:13,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:13,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,757 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:13,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:13,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:13,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:13,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:13,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,835 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:09:13,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2021-11-23 02:09:13,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:13,891 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:13,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:13,927 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:09:14,636 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8465#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:09:14,637 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:09:14,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:09:14,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2021-11-23 02:09:14,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249863806] [2021-11-23 02:09:14,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:09:14,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-23 02:09:14,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:14,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-23 02:09:14,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2021-11-23 02:09:14,649 INFO L87 Difference]: Start difference. First operand 204 states and 214 transitions. Second operand has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:09:15,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:15,397 INFO L93 Difference]: Finished difference Result 417 states and 545 transitions. [2021-11-23 02:09:15,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-23 02:09:15,397 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 states have internal predecessors, (163), 0 states have call successors, (0), 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 202 [2021-11-23 02:09:15,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:15,400 INFO L225 Difference]: With dead ends: 417 [2021-11-23 02:09:15,400 INFO L226 Difference]: Without dead ends: 313 [2021-11-23 02:09:15,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2021-11-23 02:09:15,405 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:15,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:09:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-23 02:09:15,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2021-11-23 02:09:15,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.0352564102564104) internal successors, (323), 312 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:09:15,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 323 transitions. [2021-11-23 02:09:15,420 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 323 transitions. Word has length 202 [2021-11-23 02:09:15,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:15,421 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 323 transitions. [2021-11-23 02:09:15,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:09:15,421 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 323 transitions. [2021-11-23 02:09:15,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-23 02:09:15,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:15,426 INFO L514 BasicCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:15,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-23 02:09:15,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:09:15,653 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:09:15,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:15,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1588214187, now seen corresponding path program 9 times [2021-11-23 02:09:15,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:15,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921181314] [2021-11-23 02:09:15,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:15,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2021-11-23 02:09:19,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:19,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921181314] [2021-11-23 02:09:19,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921181314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:19,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767618693] [2021-11-23 02:09:19,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:09:19,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:09:19,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:09:19,727 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:09:19,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:09:20,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:09:20,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:09:20,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1711 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-23 02:09:20,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2021-11-23 02:09:20,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2021-11-23 02:09:30,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767618693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:09:30,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1346912466] [2021-11-23 02:09:30,517 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:09:30,517 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:09:30,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:09:30,517 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:09:30,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:09:30,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:30,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:30,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:30,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:30,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:30,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:30,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:30,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:30,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:30,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:31,075 INFO L354 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2021-11-23 02:09:31,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2021-11-23 02:09:31,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:31,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:31,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:31,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:31,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:31,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:31,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:31,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:31,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:31,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:32,107 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:09:32,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:09:32,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:32,175 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:09:32,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:09:32,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:32,241 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:09:32,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:09:32,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:32,299 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:32,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:32,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:32,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:32,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:32,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:32,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:32,376 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:09:32,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:09:32,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:32,438 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:32,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:32,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:32,490 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:32,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:32,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:32,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:32,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:32,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:32,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:32,562 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:09:32,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:09:32,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:32,626 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:32,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:32,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:32,675 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:32,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:32,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:32,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:32,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:32,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:32,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:32,753 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:09:32,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:09:32,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:32,810 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:32,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:32,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:32,866 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:32,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:32,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:32,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:32,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:32,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:32,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:32,991 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:09:32,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:09:33,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,037 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:33,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:33,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,078 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:09:33,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:09:33,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,153 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:09:33,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 74 [2021-11-23 02:09:33,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,209 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:33,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:33,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,248 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:09:33,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:09:33,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,330 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:09:33,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:09:33,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,387 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:33,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:33,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,426 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:33,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:33,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:33,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:33,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,484 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:09:33,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:09:33,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,534 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:33,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:33,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,575 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:09:33,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:09:33,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,647 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:09:33,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:09:33,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,725 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:33,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:33,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,767 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:33,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:33,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:33,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:33,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:33,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,851 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:09:33,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:09:33,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:33,900 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:09:33,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:09:33,935 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:09:34,806 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11979#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (<= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.offset|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.offset|) (<= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a7~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.offset|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#a4~0#1.offset|) (<= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:09:34,806 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:09:34,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:09:34,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2021-11-23 02:09:34,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156055887] [2021-11-23 02:09:34,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:09:34,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-11-23 02:09:34,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:34,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-11-23 02:09:34,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2021-11-23 02:09:34,823 INFO L87 Difference]: Start difference. First operand 313 states and 323 transitions. Second operand has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:09:35,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:35,349 INFO L93 Difference]: Finished difference Result 626 states and 746 transitions. [2021-11-23 02:09:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-11-23 02:09:35,350 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 states have internal predecessors, (225), 0 states have call successors, (0), 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 311 [2021-11-23 02:09:35,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:35,353 INFO L225 Difference]: With dead ends: 626 [2021-11-23 02:09:35,353 INFO L226 Difference]: Without dead ends: 414 [2021-11-23 02:09:35,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1032 GetRequests, 826 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2021-11-23 02:09:35,358 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:35,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:09:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-23 02:09:35,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2021-11-23 02:09:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.026634382566586) internal successors, (424), 413 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:09:35,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 424 transitions. [2021-11-23 02:09:35,401 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 424 transitions. Word has length 311 [2021-11-23 02:09:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:35,403 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 424 transitions. [2021-11-23 02:09:35,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:09:35,404 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 424 transitions. [2021-11-23 02:09:35,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2021-11-23 02:09:35,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:35,412 INFO L514 BasicCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:35,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:35,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:09:35,637 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:09:35,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:35,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2072495007, now seen corresponding path program 10 times [2021-11-23 02:09:35,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:35,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331751131] [2021-11-23 02:09:35,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:35,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2021-11-23 02:09:49,729 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:49,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331751131] [2021-11-23 02:09:49,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331751131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:49,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482576719] [2021-11-23 02:09:49,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:09:49,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:09:49,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:09:49,731 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:09:49,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:09:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:50,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 2519 conjuncts, 202 conjunts are in the unsatisfiable core [2021-11-23 02:09:50,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2021-11-23 02:09:50,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2021-11-23 02:10:30,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482576719] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:30,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [140992235] [2021-11-23 02:10:30,508 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:10:30,509 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:10:30,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:10:30,509 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:10:30,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:10:30,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:30,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:30,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:30,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:30,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:30,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:30,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:30,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:30,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:30,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:31,085 INFO L354 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2021-11-23 02:10:31,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2021-11-23 02:10:31,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:31,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:31,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:31,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:31,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:31,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:31,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:31,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:31,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:31,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:31,978 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:10:31,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:10:32,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,070 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:10:32,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:10:32,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,117 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:10:32,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:10:32,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,168 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:10:32,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:10:32,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,249 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:10:32,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 74 [2021-11-23 02:10:32,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,302 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:10:32,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:10:32,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,339 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:10:32,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:10:32,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:32,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:32,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:32,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,399 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:10:32,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:10:32,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,439 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:10:32,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:10:32,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,479 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:10:32,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:10:32,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:32,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:32,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:32,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,537 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:10:32,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:10:32,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,578 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:10:32,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:10:32,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,619 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:10:32,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:10:32,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:32,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:32,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:32,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,679 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:10:32,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:10:32,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,723 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:10:32,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:10:32,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,766 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:10:32,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:10:32,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:32,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:32,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,815 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:10:32,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:10:32,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,858 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:10:32,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:10:32,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,898 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:10:32,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:10:32,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:32,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:32,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:32,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:32,962 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:10:32,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:10:33,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:33,038 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:10:33,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:10:33,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:33,074 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:10:33,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:10:33,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:33,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:33,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:33,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:33,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:33,167 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:10:33,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-23 02:10:33,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:33,222 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:10:33,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:10:33,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:33,262 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:10:33,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:10:33,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:33,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:33,390 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:10:33,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 74 [2021-11-23 02:10:33,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:33,468 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:10:33,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:10:33,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:33,522 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:10:33,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:10:33,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:33,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:33,640 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:10:33,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-23 02:10:33,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:33,707 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:10:33,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:10:33,757 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:10:35,173 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16921#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (<= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.offset|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.offset|) (<= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a7~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.offset|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#a4~0#1.offset|) (<= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:10:35,174 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:10:35,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:10:35,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2021-11-23 02:10:35,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129304954] [2021-11-23 02:10:35,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:10:35,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2021-11-23 02:10:35,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:35,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2021-11-23 02:10:35,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2021-11-23 02:10:35,192 INFO L87 Difference]: Start difference. First operand 414 states and 424 transitions. Second operand has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:37,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:37,323 INFO L93 Difference]: Finished difference Result 828 states and 1049 transitions. [2021-11-23 02:10:37,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2021-11-23 02:10:37,324 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 0 states have call successors, (0), 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 412 [2021-11-23 02:10:37,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:37,329 INFO L225 Difference]: With dead ends: 828 [2021-11-23 02:10:37,329 INFO L226 Difference]: Without dead ends: 616 [2021-11-23 02:10:37,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1436 GetRequests, 1028 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 53.3s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2021-11-23 02:10:37,336 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:37,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:10:37,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-11-23 02:10:37,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2021-11-23 02:10:37,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 1.0178861788617886) internal successors, (626), 615 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:37,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 626 transitions. [2021-11-23 02:10:37,370 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 626 transitions. Word has length 412 [2021-11-23 02:10:37,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:37,370 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 626 transitions. [2021-11-23 02:10:37,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 626 transitions. [2021-11-23 02:10:37,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2021-11-23 02:10:37,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:37,376 INFO L514 BasicCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:37,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-23 02:10:37,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:37,581 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:37,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:37,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1846670687, now seen corresponding path program 11 times [2021-11-23 02:10:37,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:37,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996492278] [2021-11-23 02:10:37,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:37,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 83280 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2021-11-23 02:11:31,845 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:31,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996492278] [2021-11-23 02:11:31,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996492278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:11:31,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70810715] [2021-11-23 02:11:31,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:11:31,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:31,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:31,852 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:31,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be523159-8aa2-4ac1-a567-087307aaf0de/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process