./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI --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 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:49:53,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:49:53,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:49:53,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:49:53,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:49:53,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:49:53,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:49:53,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:49:53,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:49:53,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:49:53,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:49:53,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:49:53,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:49:53,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:49:53,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:49:53,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:49:53,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:49:53,253 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:49:53,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:49:53,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:49:53,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:49:53,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:49:53,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:49:53,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:49:53,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:49:53,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:49:53,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:49:53,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:49:53,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:49:53,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:49:53,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:49:53,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:49:53,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:49:53,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:49:53,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:49:53,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:49:53,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:49:53,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:49:53,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:49:53,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:49:53,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:49:53,295 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:49:53,334 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:49:53,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:49:53,338 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:49:53,339 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:49:53,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:49:53,340 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:49:53,340 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:49:53,340 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:49:53,340 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:49:53,340 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:49:53,341 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:49:53,342 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:49:53,342 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:49:53,342 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:49:53,342 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:49:53,342 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:49:53,343 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:49:53,343 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:49:53,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:49:53,344 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:49:53,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:49:53,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:49:53,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:49:53,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:49:53,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:49:53,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:49:53,345 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:49:53,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:49:53,345 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:49:53,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:49:53,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:49:53,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:49:53,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:49:53,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:49:53,347 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:49:53,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:49:53,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:49:53,347 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:49:53,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:49:53,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:49:53,348 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:49:53,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 [2022-11-03 01:49:53,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:49:53,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:49:53,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:49:53,666 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:49:53,667 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:49:53,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2022-11-03 01:49:53,739 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/data/50191ae73/5a7876195427455e9713dc2490f54ed3/FLAG6509201bb [2022-11-03 01:49:54,149 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:49:54,149 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2022-11-03 01:49:54,154 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/data/50191ae73/5a7876195427455e9713dc2490f54ed3/FLAG6509201bb [2022-11-03 01:49:54,564 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/data/50191ae73/5a7876195427455e9713dc2490f54ed3 [2022-11-03 01:49:54,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:49:54,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:49:54,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:49:54,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:49:54,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:49:54,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:49:54" (1/1) ... [2022-11-03 01:49:54,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59139f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:54, skipping insertion in model container [2022-11-03 01:49:54,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:49:54" (1/1) ... [2022-11-03 01:49:54,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:49:54,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:49:54,800 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_87453bbb-c0f7-4390-a89a-5990252ce570/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2022-11-03 01:49:54,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:49:54,814 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:49:54,828 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_87453bbb-c0f7-4390-a89a-5990252ce570/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2022-11-03 01:49:54,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:49:54,843 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:49:54,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:54 WrapperNode [2022-11-03 01:49:54,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:49:54,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:49:54,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:49:54,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:49:54,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:54" (1/1) ... [2022-11-03 01:49:54,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:54" (1/1) ... [2022-11-03 01:49:54,875 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2022-11-03 01:49:54,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:49:54,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:49:54,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:49:54,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:49:54,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:54" (1/1) ... [2022-11-03 01:49:54,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:54" (1/1) ... [2022-11-03 01:49:54,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:54" (1/1) ... [2022-11-03 01:49:54,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:54" (1/1) ... [2022-11-03 01:49:54,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:54" (1/1) ... [2022-11-03 01:49:54,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:54" (1/1) ... [2022-11-03 01:49:54,896 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:54" (1/1) ... [2022-11-03 01:49:54,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:54" (1/1) ... [2022-11-03 01:49:54,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:49:54,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:49:54,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:49:54,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:49:54,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:54" (1/1) ... [2022-11-03 01:49:54,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:49:54,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:54,932 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:49:54,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:49:54,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:49:54,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:49:54,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:49:54,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:49:54,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:49:54,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:49:54,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:49:54,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:49:55,054 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:49:55,056 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:49:55,173 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:49:55,200 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:49:55,200 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:49:55,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:49:55 BoogieIcfgContainer [2022-11-03 01:49:55,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:49:55,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:49:55,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:49:55,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:49:55,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:49:54" (1/3) ... [2022-11-03 01:49:55,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104b03da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:49:55, skipping insertion in model container [2022-11-03 01:49:55,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:54" (2/3) ... [2022-11-03 01:49:55,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104b03da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:49:55, skipping insertion in model container [2022-11-03 01:49:55,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:49:55" (3/3) ... [2022-11-03 01:49:55,220 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2022-11-03 01:49:55,243 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:49:55,243 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:49:55,289 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:49:55,296 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4920f46a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:49:55,297 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:49:55,301 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:55,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:49:55,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:55,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:55,309 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:55,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:55,316 INFO L85 PathProgramCache]: Analyzing trace with hash 272684364, now seen corresponding path program 1 times [2022-11-03 01:49:55,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:55,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610331575] [2022-11-03 01:49:55,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:55,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:55,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:55,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610331575] [2022-11-03 01:49:55,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610331575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:55,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:55,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:49:55,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717786475] [2022-11-03 01:49:55,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:55,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:55,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:55,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:55,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:49:55,685 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:55,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:55,747 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2022-11-03 01:49:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:55,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 01:49:55,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:55,764 INFO L225 Difference]: With dead ends: 21 [2022-11-03 01:49:55,764 INFO L226 Difference]: Without dead ends: 10 [2022-11-03 01:49:55,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:49:55,771 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:55,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:49:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-03 01:49:55,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-03 01:49:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-03 01:49:55,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2022-11-03 01:49:55,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:55,808 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-03 01:49:55,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:55,808 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-03 01:49:55,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:49:55,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:55,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:55,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:49:55,810 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:55,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:55,811 INFO L85 PathProgramCache]: Analyzing trace with hash -2077770057, now seen corresponding path program 1 times [2022-11-03 01:49:55,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:55,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154903965] [2022-11-03 01:49:55,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:55,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:55,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:56,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154903965] [2022-11-03 01:49:56,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154903965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:56,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501712195] [2022-11-03 01:49:56,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:56,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:56,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:56,014 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:56,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:49:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:56,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:49:56,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:56,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:56,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501712195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:56,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1430666204] [2022-11-03 01:49:56,253 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:49:56,253 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:49:56,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:49:56,264 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:49:56,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:49:56,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:56,415 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 01:49:56,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-11-03 01:49:56,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:56,482 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:49:56,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:49:56,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:56,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:49:56,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:56,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:49:56,758 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:49:56,760 INFO L390 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 4 case distinctions, treesize of input 226 treesize of output 225 [2022-11-03 01:49:57,025 INFO L390 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:49:57,052 INFO L390 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 01:49:57,079 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:49:57,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1430666204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:57,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:49:57,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 12 [2022-11-03 01:49:57,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385802620] [2022-11-03 01:49:57,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:57,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:49:57,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:57,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:49:57,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:49:57,388 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:57,434 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-11-03 01:49:57,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:49:57,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 01:49:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:57,435 INFO L225 Difference]: With dead ends: 15 [2022-11-03 01:49:57,435 INFO L226 Difference]: Without dead ends: 12 [2022-11-03 01:49:57,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:49:57,437 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:57,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 4 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:49:57,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-03 01:49:57,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-03 01:49:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-11-03 01:49:57,443 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2022-11-03 01:49:57,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:57,443 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-11-03 01:49:57,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:57,444 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-11-03 01:49:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:49:57,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:57,445 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:57,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 01:49:57,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:57,659 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:57,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:57,660 INFO L85 PathProgramCache]: Analyzing trace with hash 420679642, now seen corresponding path program 1 times [2022-11-03 01:49:57,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:57,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774410435] [2022-11-03 01:49:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:57,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:49:57,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:57,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774410435] [2022-11-03 01:49:57,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774410435] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:57,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514051495] [2022-11-03 01:49:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:57,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:57,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:57,765 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:57,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:49:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:57,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:49:57,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:49:57,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:49:57,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514051495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:57,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1668240833] [2022-11-03 01:49:57,867 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:49:57,868 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:49:57,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:49:57,868 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:49:57,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:49:57,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:57,934 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:49:57,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:49:57,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:57,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-03 01:49:58,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:58,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 01:49:58,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:58,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:58,115 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:49:58,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 236 treesize of output 224 [2022-11-03 01:49:58,206 INFO L390 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:49:58,239 INFO L390 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 01:49:58,307 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:49:58,724 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '220#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-03 01:49:58,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:49:58,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:49:58,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-03 01:49:58,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968025286] [2022-11-03 01:49:58,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:49:58,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:49:58,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:58,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:49:58,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:49:58,727 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:58,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:58,773 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-11-03 01:49:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:49:58,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 11 [2022-11-03 01:49:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:58,776 INFO L225 Difference]: With dead ends: 24 [2022-11-03 01:49:58,776 INFO L226 Difference]: Without dead ends: 15 [2022-11-03 01:49:58,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:49:58,777 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:58,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:49:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-03 01:49:58,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-03 01:49:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:58,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-03 01:49:58,788 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-11-03 01:49:58,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:58,788 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-03 01:49:58,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:58,789 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-03 01:49:58,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:49:58,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:58,790 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:58,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:59,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:59,011 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:59,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:59,011 INFO L85 PathProgramCache]: Analyzing trace with hash 55551983, now seen corresponding path program 2 times [2022-11-03 01:49:59,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:59,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390510263] [2022-11-03 01:49:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:59,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:49:59,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:59,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390510263] [2022-11-03 01:49:59,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390510263] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:59,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664222379] [2022-11-03 01:49:59,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:49:59,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:59,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:59,125 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:59,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:49:59,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:49:59,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:49:59,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:49:59,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:59,213 INFO L390 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 01:49:59,244 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:49:59,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-03 01:49:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:49:59,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:59,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 01:49:59,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-11-03 01:49:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:49:59,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664222379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:59,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131533830] [2022-11-03 01:49:59,441 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:49:59,442 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:49:59,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:49:59,442 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:49:59,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:49:59,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:59,487 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 01:49:59,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-11-03 01:49:59,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:59,535 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:49:59,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:49:59,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:59,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:49:59,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:59,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:49:59,690 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:49:59,691 INFO L390 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 4 case distinctions, treesize of input 226 treesize of output 225 [2022-11-03 01:49:59,806 INFO L390 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:49:59,822 INFO L390 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 01:49:59,885 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:50:00,301 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '375#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-03 01:50:00,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:50:00,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:50:00,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-11-03 01:50:00,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846840962] [2022-11-03 01:50:00,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:50:00,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 01:50:00,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:00,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 01:50:00,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:50:00,303 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:00,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:00,506 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-11-03 01:50:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:50:00,506 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-03 01:50:00,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:00,507 INFO L225 Difference]: With dead ends: 31 [2022-11-03 01:50:00,507 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 01:50:00,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:50:00,509 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:00,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 16 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:50:00,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 01:50:00,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-03 01:50:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-03 01:50:00,516 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2022-11-03 01:50:00,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:00,516 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-03 01:50:00,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:00,517 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-03 01:50:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 01:50:00,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:00,517 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:00,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:00,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:00,743 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:00,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:00,743 INFO L85 PathProgramCache]: Analyzing trace with hash 960336160, now seen corresponding path program 3 times [2022-11-03 01:50:00,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:00,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853093106] [2022-11-03 01:50:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:00,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:50:00,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:00,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853093106] [2022-11-03 01:50:00,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853093106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:00,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507709976] [2022-11-03 01:50:00,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:50:00,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:00,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:00,869 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:00,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:50:00,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:50:00,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:50:00,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:50:00,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:50:00,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:50:01,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507709976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:01,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1344443556] [2022-11-03 01:50:01,037 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:50:01,038 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:50:01,038 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:50:01,038 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:50:01,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:50:01,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:01,085 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:50:01,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:50:01,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:01,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-03 01:50:01,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:01,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:50:01,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:01,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:50:01,236 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:50:01,236 INFO L390 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 4 case distinctions, treesize of input 226 treesize of output 225 [2022-11-03 01:50:01,323 INFO L390 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:50:01,338 INFO L390 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 01:50:01,392 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:50:01,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '590#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-03 01:50:01,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:50:01,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:50:01,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-03 01:50:01,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046932494] [2022-11-03 01:50:01,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:50:01,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 01:50:01,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:01,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 01:50:01,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:50:01,708 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:01,746 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-11-03 01:50:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:50:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 01:50:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:01,748 INFO L225 Difference]: With dead ends: 40 [2022-11-03 01:50:01,748 INFO L226 Difference]: Without dead ends: 27 [2022-11-03 01:50:01,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:50:01,751 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:01,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:50:01,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-03 01:50:01,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-03 01:50:01,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-11-03 01:50:01,765 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2022-11-03 01:50:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:01,765 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-11-03 01:50:01,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-11-03 01:50:01,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 01:50:01,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:01,767 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:01,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:01,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:01,991 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:01,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:01,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1415055627, now seen corresponding path program 4 times [2022-11-03 01:50:01,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:01,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858667289] [2022-11-03 01:50:01,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:01,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:50:02,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:02,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858667289] [2022-11-03 01:50:02,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858667289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:02,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787205588] [2022-11-03 01:50:02,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:50:02,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:02,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:02,389 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:02,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:50:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:02,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:02,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:02,513 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:50:02,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:50:02,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787205588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:02,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1978733769] [2022-11-03 01:50:02,811 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:50:02,812 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:50:02,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:50:02,812 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:50:02,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:50:02,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:02,888 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 01:50:02,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-11-03 01:50:02,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:02,938 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:50:02,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:50:02,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:02,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:50:03,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:03,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:50:03,117 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:50:03,118 INFO L390 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 4 case distinctions, treesize of input 226 treesize of output 225 [2022-11-03 01:50:03,229 INFO L390 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:50:03,244 INFO L390 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 01:50:03,303 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:50:03,693 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '881#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-03 01:50:03,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:50:03,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:50:03,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2022-11-03 01:50:03,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638449740] [2022-11-03 01:50:03,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:50:03,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-03 01:50:03,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:03,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-03 01:50:03,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=821, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 01:50:03,696 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:03,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:03,760 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-11-03 01:50:03,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 01:50:03,761 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-03 01:50:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:03,761 INFO L225 Difference]: With dead ends: 54 [2022-11-03 01:50:03,762 INFO L226 Difference]: Without dead ends: 41 [2022-11-03 01:50:03,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=439, Invalid=821, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 01:50:03,763 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:03,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:50:03,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-03 01:50:03,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-03 01:50:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-11-03 01:50:03,778 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 26 [2022-11-03 01:50:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:03,779 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-11-03 01:50:03,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:03,779 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-11-03 01:50:03,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:50:03,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:03,780 INFO L195 NwaCegarLoop]: trace histogram [26, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:03,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:03,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:50:03,997 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:03,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:03,998 INFO L85 PathProgramCache]: Analyzing trace with hash 410080405, now seen corresponding path program 5 times [2022-11-03 01:50:03,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:03,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517152992] [2022-11-03 01:50:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:03,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:50:04,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:04,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517152992] [2022-11-03 01:50:04,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517152992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:04,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579049568] [2022-11-03 01:50:04,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:50:04,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:04,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:04,904 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:04,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:50:05,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:50:05,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:50:05,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 01:50:05,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:05,072 INFO L390 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 01:50:05,480 INFO L356 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2022-11-03 01:50:05,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 73 [2022-11-03 01:50:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-11-03 01:50:05,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:06,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-11-03 01:50:06,434 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:50:06,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 86 [2022-11-03 01:50:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-11-03 01:50:06,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579049568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:06,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [931129002] [2022-11-03 01:50:06,489 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:50:06,489 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:50:06,490 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:50:06,490 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:50:06,490 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:50:06,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:06,543 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:50:06,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:50:06,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:06,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-03 01:50:06,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:06,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:50:06,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:06,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:50:06,693 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:50:06,693 INFO L390 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 4 case distinctions, treesize of input 226 treesize of output 225 [2022-11-03 01:50:06,798 INFO L390 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:50:06,815 INFO L390 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 01:50:06,895 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:50:07,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1328#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-03 01:50:07,531 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:50:07,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:50:07,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11, 11] total 45 [2022-11-03 01:50:07,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194725766] [2022-11-03 01:50:07,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:50:07,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-03 01:50:07,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:07,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-03 01:50:07,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=2121, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 01:50:07,534 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 45 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:08,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:08,057 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2022-11-03 01:50:08,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-03 01:50:08,058 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-03 01:50:08,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:08,059 INFO L225 Difference]: With dead ends: 62 [2022-11-03 01:50:08,059 INFO L226 Difference]: Without dead ends: 48 [2022-11-03 01:50:08,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=584, Invalid=2608, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 01:50:08,061 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:08,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 37 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-03 01:50:08,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-03 01:50:08,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-03 01:50:08,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:08,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-11-03 01:50:08,076 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 40 [2022-11-03 01:50:08,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:08,076 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-11-03 01:50:08,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-11-03 01:50:08,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 01:50:08,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:08,078 INFO L195 NwaCegarLoop]: trace histogram [27, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:08,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:08,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:08,283 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:08,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:08,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1421567081, now seen corresponding path program 6 times [2022-11-03 01:50:08,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:08,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221728261] [2022-11-03 01:50:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:08,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 01:50:09,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:09,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221728261] [2022-11-03 01:50:09,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221728261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:09,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756707276] [2022-11-03 01:50:09,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:50:09,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:09,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:09,223 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:09,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:50:09,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:50:09,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:50:09,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 01:50:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 01:50:09,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 01:50:10,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756707276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:10,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1825184926] [2022-11-03 01:50:10,645 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:50:10,646 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:50:10,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:50:10,646 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:50:10,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:50:10,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:10,696 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:50:10,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:50:10,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:10,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-03 01:50:10,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:10,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 01:50:10,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:10,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:10,838 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:50:10,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 236 treesize of output 224 [2022-11-03 01:50:10,905 INFO L390 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:50:10,932 INFO L390 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 01:50:10,990 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:50:11,536 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1864#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-03 01:50:11,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:50:11,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:50:11,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 58 [2022-11-03 01:50:11,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208339859] [2022-11-03 01:50:11,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:50:11,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-03 01:50:11,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:11,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-03 01:50:11,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1744, Invalid=2546, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 01:50:11,541 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:11,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:11,693 INFO L93 Difference]: Finished difference Result 96 states and 126 transitions. [2022-11-03 01:50:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-03 01:50:11,694 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-03 01:50:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:11,695 INFO L225 Difference]: With dead ends: 96 [2022-11-03 01:50:11,695 INFO L226 Difference]: Without dead ends: 77 [2022-11-03 01:50:11,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1744, Invalid=2546, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 01:50:11,698 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:11,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:50:11,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-03 01:50:11,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-03 01:50:11,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-11-03 01:50:11,722 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 47 [2022-11-03 01:50:11,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:11,722 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-11-03 01:50:11,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:11,723 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-11-03 01:50:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 01:50:11,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:11,725 INFO L195 NwaCegarLoop]: trace histogram [56, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:11,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:11,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:11,951 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:11,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:11,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1955363806, now seen corresponding path program 7 times [2022-11-03 01:50:11,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:11,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069793763] [2022-11-03 01:50:11,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:11,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:15,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 01:50:15,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:15,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069793763] [2022-11-03 01:50:15,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069793763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:15,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947686482] [2022-11-03 01:50:15,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:50:15,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:15,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:15,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:15,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:50:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:15,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 01:50:15,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 01:50:15,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 01:50:19,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947686482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:19,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2000809831] [2022-11-03 01:50:19,523 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:50:19,523 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:50:19,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:50:19,524 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:50:19,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:50:19,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:19,572 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:50:19,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:50:19,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:19,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-03 01:50:19,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:19,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:50:19,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:19,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:50:19,703 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:50:19,704 INFO L390 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 4 case distinctions, treesize of input 226 treesize of output 225 [2022-11-03 01:50:19,798 INFO L390 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:50:19,815 INFO L390 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 01:50:19,868 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:50:20,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2746#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-03 01:50:20,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:50:20,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:50:20,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 116 [2022-11-03 01:50:20,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079081429] [2022-11-03 01:50:20,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:50:20,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-11-03 01:50:20,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:20,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-11-03 01:50:20,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6819, Invalid=8433, Unknown=0, NotChecked=0, Total=15252 [2022-11-03 01:50:20,448 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:20,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:20,721 INFO L93 Difference]: Finished difference Result 154 states and 213 transitions. [2022-11-03 01:50:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-03 01:50:20,722 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 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 76 [2022-11-03 01:50:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:20,723 INFO L225 Difference]: With dead ends: 154 [2022-11-03 01:50:20,723 INFO L226 Difference]: Without dead ends: 135 [2022-11-03 01:50:20,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=6819, Invalid=8433, Unknown=0, NotChecked=0, Total=15252 [2022-11-03 01:50:20,727 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:20,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:50:20,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-03 01:50:20,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-11-03 01:50:20,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:20,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-11-03 01:50:20,759 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 76 [2022-11-03 01:50:20,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:20,759 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-11-03 01:50:20,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:20,760 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-11-03 01:50:20,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 01:50:20,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:20,762 INFO L195 NwaCegarLoop]: trace histogram [114, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:20,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:20,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:20,975 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:20,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:20,975 INFO L85 PathProgramCache]: Analyzing trace with hash 633216958, now seen corresponding path program 8 times [2022-11-03 01:50:20,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:20,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31329618] [2022-11-03 01:50:20,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:20,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6597 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 01:50:30,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:30,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31329618] [2022-11-03 01:50:30,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31329618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:30,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345096328] [2022-11-03 01:50:30,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:50:30,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:30,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:30,205 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:30,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:50:30,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-03 01:50:30,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:50:30,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 01:50:30,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:30,660 INFO L390 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 01:50:32,424 INFO L356 Elim1Store]: treesize reduction 20, result has 86.4 percent of original size [2022-11-03 01:50:32,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 153 [2022-11-03 01:50:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6597 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2022-11-03 01:50:33,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:37,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 88 [2022-11-03 01:50:37,538 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:50:37,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 130 treesize of output 185 [2022-11-03 01:50:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6597 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2022-11-03 01:50:37,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345096328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:37,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [859761326] [2022-11-03 01:50:37,685 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:50:37,685 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:50:37,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:50:37,685 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:50:37,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:50:37,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:37,739 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:50:37,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:50:37,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:37,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-03 01:50:37,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:37,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:50:37,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:37,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:50:37,869 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:50:37,870 INFO L390 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 4 case distinctions, treesize of input 226 treesize of output 225 [2022-11-03 01:50:37,991 INFO L390 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:50:38,013 INFO L390 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 01:50:38,072 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:50:39,257 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4236#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-03 01:50:39,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:50:39,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:50:39,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 17, 17] total 145 [2022-11-03 01:50:39,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467200685] [2022-11-03 01:50:39,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:50:39,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-11-03 01:50:39,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:39,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-11-03 01:50:39,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7027, Invalid=15925, Unknown=0, NotChecked=0, Total=22952 [2022-11-03 01:50:39,265 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 145 states, 145 states have (on average 1.089655172413793) internal successors, (158), 145 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:43,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:43,181 INFO L93 Difference]: Finished difference Result 168 states and 176 transitions. [2022-11-03 01:50:43,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-11-03 01:50:43,182 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.089655172413793) internal successors, (158), 145 states have internal predecessors, (158), 0 states have call successors, (0), 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 134 [2022-11-03 01:50:43,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:43,183 INFO L225 Difference]: With dead ends: 168 [2022-11-03 01:50:43,183 INFO L226 Difference]: Without dead ends: 148 [2022-11-03 01:50:43,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 364 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5009 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=7238, Invalid=19168, Unknown=0, NotChecked=0, Total=26406 [2022-11-03 01:50:43,187 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:43,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 62 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 363 Invalid, 0 Unknown, 125 Unchecked, 0.3s Time] [2022-11-03 01:50:43,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-03 01:50:43,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-11-03 01:50:43,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-11-03 01:50:43,223 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 134 [2022-11-03 01:50:43,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:43,224 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-11-03 01:50:43,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.089655172413793) internal successors, (158), 145 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:43,225 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-11-03 01:50:43,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-03 01:50:43,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:43,229 INFO L195 NwaCegarLoop]: trace histogram [115, 13, 12, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:43,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:43,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 01:50:43,442 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:43,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:43,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2070549627, now seen corresponding path program 9 times [2022-11-03 01:50:43,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:43,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852341689] [2022-11-03 01:50:43,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:43,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6826 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-03 01:50:52,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:52,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852341689] [2022-11-03 01:50:52,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852341689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:52,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464301909] [2022-11-03 01:50:52,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:50:52,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:52,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:52,680 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:52,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:50:53,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:50:53,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:50:53,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 1162 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-03 01:50:53,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6826 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-03 01:50:53,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6826 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-03 01:51:11,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464301909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:11,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [372389540] [2022-11-03 01:51:11,005 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:51:11,005 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:51:11,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:51:11,006 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:51:11,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:51:11,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:11,049 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 01:51:11,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-11-03 01:51:11,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:11,099 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:51:11,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:51:11,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:11,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 01:51:11,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:11,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:11,224 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:51:11,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 236 treesize of output 224 [2022-11-03 01:51:11,283 INFO L390 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:51:11,307 INFO L390 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 01:51:11,354 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:51:12,379 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5957#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-03 01:51:12,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:51:12,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:51:12,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117, 117] total 234 [2022-11-03 01:51:12,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693488148] [2022-11-03 01:51:12,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:51:12,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 235 states [2022-11-03 01:51:12,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:12,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2022-11-03 01:51:12,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27528, Invalid=30794, Unknown=0, NotChecked=0, Total=58322 [2022-11-03 01:51:12,395 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 235 states, 235 states have (on average 1.0340425531914894) internal successors, (243), 234 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:13,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:13,305 INFO L93 Difference]: Finished difference Result 296 states and 414 transitions. [2022-11-03 01:51:13,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2022-11-03 01:51:13,306 INFO L78 Accepts]: Start accepts. Automaton has has 235 states, 235 states have (on average 1.0340425531914894) internal successors, (243), 234 states have internal predecessors, (243), 0 states have call successors, (0), 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 147 [2022-11-03 01:51:13,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:13,308 INFO L225 Difference]: With dead ends: 296 [2022-11-03 01:51:13,308 INFO L226 Difference]: Without dead ends: 265 [2022-11-03 01:51:13,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=27528, Invalid=30794, Unknown=0, NotChecked=0, Total=58322 [2022-11-03 01:51:13,313 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:13,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:51:13,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-11-03 01:51:13,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2022-11-03 01:51:13,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.0075757575757576) internal successors, (266), 264 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:13,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2022-11-03 01:51:13,364 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 147 [2022-11-03 01:51:13,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:13,365 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2022-11-03 01:51:13,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 235 states, 235 states have (on average 1.0340425531914894) internal successors, (243), 234 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:13,366 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2022-11-03 01:51:13,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-03 01:51:13,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:13,370 INFO L195 NwaCegarLoop]: trace histogram [232, 13, 12, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:13,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:13,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:13,578 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:13,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:13,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1516090896, now seen corresponding path program 10 times [2022-11-03 01:51:13,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:13,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332672245] [2022-11-03 01:51:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:13,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 27184 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-03 01:51:48,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:48,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332672245] [2022-11-03 01:51:48,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332672245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:48,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975823983] [2022-11-03 01:51:48,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:51:48,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:48,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:48,362 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:48,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:51:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:49,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 2215 conjuncts, 234 conjunts are in the unsatisfiable core [2022-11-03 01:51:49,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 27184 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-03 01:51:49,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 27184 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-03 01:52:56,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975823983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:56,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1841748123] [2022-11-03 01:52:56,540 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:52:56,540 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:52:56,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:52:56,541 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:52:56,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:52:56,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:56,585 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:52:56,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:52:56,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:56,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-03 01:52:56,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:56,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 01:52:56,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:56,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:56,692 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:52:56,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 236 treesize of output 224 [2022-11-03 01:52:56,749 INFO L390 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:52:56,766 INFO L390 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 01:52:56,816 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:58,549 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9077#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-03 01:52:58,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:52:58,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:52:58,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [234, 234, 234] total 468 [2022-11-03 01:52:58,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307763872] [2022-11-03 01:52:58,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:58,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 469 states [2022-11-03 01:52:58,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:58,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 469 interpolants. [2022-11-03 01:52:58,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109779, Invalid=116321, Unknown=0, NotChecked=0, Total=226100 [2022-11-03 01:52:58,584 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 469 states, 469 states have (on average 1.0170575692963753) internal successors, (477), 468 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:02,651 INFO L93 Difference]: Finished difference Result 530 states and 765 transitions. [2022-11-03 01:53:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 468 states. [2022-11-03 01:53:02,652 INFO L78 Accepts]: Start accepts. Automaton has has 469 states, 469 states have (on average 1.0170575692963753) internal successors, (477), 468 states have internal predecessors, (477), 0 states have call successors, (0), 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 264 [2022-11-03 01:53:02,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:02,655 INFO L225 Difference]: With dead ends: 530 [2022-11-03 01:53:02,655 INFO L226 Difference]: Without dead ends: 499 [2022-11-03 01:53:02,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1024 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 474 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5825 ImplicationChecksByTransitivity, 91.2s TimeCoverageRelationStatistics Valid=109779, Invalid=116321, Unknown=0, NotChecked=0, Total=226100 [2022-11-03 01:53:02,666 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:02,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:53:02,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-03 01:53:02,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2022-11-03 01:53:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.0040160642570282) internal successors, (500), 498 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:02,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 500 transitions. [2022-11-03 01:53:02,744 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 500 transitions. Word has length 264 [2022-11-03 01:53:02,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:02,744 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 500 transitions. [2022-11-03 01:53:02,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 469 states, 469 states have (on average 1.0170575692963753) internal successors, (477), 468 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:02,745 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 500 transitions. [2022-11-03 01:53:02,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-11-03 01:53:02,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:02,756 INFO L195 NwaCegarLoop]: trace histogram [466, 13, 12, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:02,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:02,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:02,970 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:02,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:02,971 INFO L85 PathProgramCache]: Analyzing trace with hash 415258320, now seen corresponding path program 11 times [2022-11-03 01:53:02,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:02,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578456190] [2022-11-03 01:53:02,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:02,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 108967 backedges. 0 proven. 108811 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-03 01:55:25,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:25,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578456190] [2022-11-03 01:55:25,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578456190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:55:25,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171185253] [2022-11-03 01:55:25,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:55:25,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:25,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:25,144 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:25,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 01:55:26,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-03 01:55:26,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:55:26,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-03 01:55:26,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:26,812 INFO L390 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 01:55:46,962 INFO L356 Elim1Store]: treesize reduction 44, result has 86.5 percent of original size [2022-11-03 01:55:46,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 134 treesize of output 333 [2022-11-03 01:55:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 108967 backedges. 0 proven. 1551 refuted. 0 times theorem prover too weak. 107416 trivial. 0 not checked. [2022-11-03 01:55:49,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:07,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 172 [2022-11-03 01:56:07,286 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:56:07,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 244 treesize of output 395 [2022-11-03 01:56:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 108967 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 108811 trivial. 0 not checked. [2022-11-03 01:56:07,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171185253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:07,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [522305512] [2022-11-03 01:56:07,848 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:56:07,848 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:07,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:56:07,850 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:56:07,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:56:07,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:07,968 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:56:07,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:56:07,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:07,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-03 01:56:08,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:08,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 01:56:08,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:08,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:08,079 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:56:08,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 236 treesize of output 224 [2022-11-03 01:56:08,135 INFO L390 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:56:08,160 INFO L390 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 01:56:08,209 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:56:11,964 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14591#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-03 01:56:11,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:56:11,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:11,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [468, 32, 29] total 523 [2022-11-03 01:56:11,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031392679] [2022-11-03 01:56:11,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:11,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 523 states [2022-11-03 01:56:11,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:11,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 523 interpolants. [2022-11-03 01:56:11,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111324, Invalid=169046, Unknown=0, NotChecked=0, Total=280370 [2022-11-03 01:56:11,999 INFO L87 Difference]: Start difference. First operand 499 states and 500 transitions. Second operand has 523 states, 523 states have (on average 1.0267686424474187) internal successors, (537), 523 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:06,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:06,270 INFO L93 Difference]: Finished difference Result 556 states and 570 transitions. [2022-11-03 01:57:06,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 518 states. [2022-11-03 01:57:06,271 INFO L78 Accepts]: Start accepts. Automaton has has 523 states, 523 states have (on average 1.0267686424474187) internal successors, (537), 523 states have internal predecessors, (537), 0 states have call successors, (0), 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 498 [2022-11-03 01:57:06,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:06,274 INFO L225 Difference]: With dead ends: 556 [2022-11-03 01:57:06,274 INFO L226 Difference]: Without dead ends: 524 [2022-11-03 01:57:06,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1985 GetRequests, 1430 SyntacticMatches, 2 SemanticMatches, 553 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33136 ImplicationChecksByTransitivity, 172.2s TimeCoverageRelationStatistics Valid=112252, Invalid=195218, Unknown=0, NotChecked=0, Total=307470 [2022-11-03 01:57:06,295 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 156 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:06,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 69 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 900 Invalid, 0 Unknown, 365 Unchecked, 0.8s Time] [2022-11-03 01:57:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-11-03 01:57:06,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 524. [2022-11-03 01:57:06,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.0038240917782026) internal successors, (525), 523 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 525 transitions. [2022-11-03 01:57:06,386 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 525 transitions. Word has length 498 [2022-11-03 01:57:06,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:06,387 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 525 transitions. [2022-11-03 01:57:06,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 523 states, 523 states have (on average 1.0267686424474187) internal successors, (537), 523 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:06,388 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 525 transitions. [2022-11-03 01:57:06,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2022-11-03 01:57:06,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:06,402 INFO L195 NwaCegarLoop]: trace histogram [467, 25, 24, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:06,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:06,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 01:57:06,614 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:06,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:06,615 INFO L85 PathProgramCache]: Analyzing trace with hash -227951969, now seen corresponding path program 12 times [2022-11-03 01:57:06,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:06,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000277506] [2022-11-03 01:57:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:06,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 109878 backedges. 0 proven. 109278 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-11-03 01:59:47,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:47,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000277506] [2022-11-03 01:59:47,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000277506] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:47,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423698651] [2022-11-03 01:59:47,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:59:47,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:47,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:47,088 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:47,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87453bbb-c0f7-4390-a89a-5990252ce570/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:59:48,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:59:48,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:59:48,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 4390 conjuncts, 469 conjunts are in the unsatisfiable core [2022-11-03 01:59:48,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 109878 backedges. 0 proven. 109278 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-11-03 01:59:49,455 INFO L328 TraceCheckSpWp]: Computing backward predicates...