./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy7_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/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_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy7_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/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_fc38ae71-5300-4b91-a32a-299e55101d23/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 cbf527dd3c93b1481b5a3e05c502e53db8f02c4e20ad58a12006bf35717e53d7 --- 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 01:43:05,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:43:05,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:43:05,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:43:05,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:43:05,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:43:05,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:43:05,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:43:05,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:43:05,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:43:05,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:43:05,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:43:05,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:43:05,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:43:05,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:43:05,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:43:05,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:43:05,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:43:05,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:43:05,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:43:05,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:43:05,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:43:05,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:43:05,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:43:05,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:43:05,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:43:05,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:43:05,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:43:05,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:43:05,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:43:05,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:43:05,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:43:05,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:43:05,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:43:05,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:43:05,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:43:05,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:43:05,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:43:05,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:43:05,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:43:05,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:43:05,270 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:43:05,312 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:43:05,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:43:05,312 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:43:05,313 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:43:05,314 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:43:05,314 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:43:05,314 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:43:05,314 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:43:05,314 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:43:05,315 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:43:05,316 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:43:05,316 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:43:05,316 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:43:05,316 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:43:05,316 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:43:05,317 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:43:05,317 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:43:05,317 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:43:05,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:43:05,318 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:43:05,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:43:05,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:43:05,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:43:05,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:43:05,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:43:05,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:43:05,321 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:43:05,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:43:05,321 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:43:05,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:43:05,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:43:05,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:43:05,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:43:05,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:43:05,322 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:43:05,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:43:05,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:43:05,323 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:43:05,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:43:05,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:43:05,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:43:05,324 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_fc38ae71-5300-4b91-a32a-299e55101d23/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cbf527dd3c93b1481b5a3e05c502e53db8f02c4e20ad58a12006bf35717e53d7 [2022-11-03 01:43:05,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:43:05,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:43:05,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:43:05,693 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:43:05,694 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:43:05,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-examples/standard_copy7_ground-2.i [2022-11-03 01:43:05,769 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/data/fe22cd2eb/26fee33758a54e7cb80a352b1f0ad90e/FLAG4551c5c6d [2022-11-03 01:43:06,280 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:43:06,280 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/sv-benchmarks/c/array-examples/standard_copy7_ground-2.i [2022-11-03 01:43:06,286 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/data/fe22cd2eb/26fee33758a54e7cb80a352b1f0ad90e/FLAG4551c5c6d [2022-11-03 01:43:06,662 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/data/fe22cd2eb/26fee33758a54e7cb80a352b1f0ad90e [2022-11-03 01:43:06,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:43:06,665 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:43:06,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:43:06,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:43:06,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:43:06,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:43:06" (1/1) ... [2022-11-03 01:43:06,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d7d20c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:06, skipping insertion in model container [2022-11-03 01:43:06,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:43:06" (1/1) ... [2022-11-03 01:43:06,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:43:06,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:43:06,861 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_fc38ae71-5300-4b91-a32a-299e55101d23/sv-benchmarks/c/array-examples/standard_copy7_ground-2.i[816,829] [2022-11-03 01:43:06,910 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:43:06,922 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:43:06,944 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_fc38ae71-5300-4b91-a32a-299e55101d23/sv-benchmarks/c/array-examples/standard_copy7_ground-2.i[816,829] [2022-11-03 01:43:06,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:43:07,002 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:43:07,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:07 WrapperNode [2022-11-03 01:43:07,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:43:07,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:43:07,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:43:07,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:43:07,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:07" (1/1) ... [2022-11-03 01:43:07,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:07" (1/1) ... [2022-11-03 01:43:07,049 INFO L138 Inliner]: procedures = 16, calls = 48, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 160 [2022-11-03 01:43:07,049 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:43:07,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:43:07,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:43:07,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:43:07,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:07" (1/1) ... [2022-11-03 01:43:07,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:07" (1/1) ... [2022-11-03 01:43:07,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:07" (1/1) ... [2022-11-03 01:43:07,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:07" (1/1) ... [2022-11-03 01:43:07,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:07" (1/1) ... [2022-11-03 01:43:07,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:07" (1/1) ... [2022-11-03 01:43:07,103 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:07" (1/1) ... [2022-11-03 01:43:07,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:07" (1/1) ... [2022-11-03 01:43:07,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:43:07,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:43:07,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:43:07,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:43:07,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:07" (1/1) ... [2022-11-03 01:43:07,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:43:07,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:07,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:43:07,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:43:07,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:43:07,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:43:07,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:43:07,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:43:07,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:43:07,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:43:07,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:43:07,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:43:07,281 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:43:07,283 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:43:07,594 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:43:07,684 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:43:07,685 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-03 01:43:07,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:43:07 BoogieIcfgContainer [2022-11-03 01:43:07,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:43:07,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:43:07,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:43:07,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:43:07,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:43:06" (1/3) ... [2022-11-03 01:43:07,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d04b82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:43:07, skipping insertion in model container [2022-11-03 01:43:07,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:07" (2/3) ... [2022-11-03 01:43:07,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d04b82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:43:07, skipping insertion in model container [2022-11-03 01:43:07,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:43:07" (3/3) ... [2022-11-03 01:43:07,703 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-2.i [2022-11-03 01:43:07,724 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:43:07,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:43:07,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:43:07,820 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;@7aed172b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:43:07,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:43:07,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:07,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 01:43:07,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:07,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:07,833 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:07,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:07,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1105021150, now seen corresponding path program 1 times [2022-11-03 01:43:07,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:07,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146523153] [2022-11-03 01:43:07,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:07,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:08,303 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 01:43:08,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:08,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146523153] [2022-11-03 01:43:08,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146523153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:08,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:08,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:43:08,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139733274] [2022-11-03 01:43:08,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:08,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:43:08,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:08,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:43:08,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:43:08,355 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:08,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:08,465 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2022-11-03 01:43:08,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:43:08,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 01:43:08,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:08,476 INFO L225 Difference]: With dead ends: 29 [2022-11-03 01:43:08,476 INFO L226 Difference]: Without dead ends: 15 [2022-11-03 01:43:08,479 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 01:43:08,483 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:08,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:08,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-03 01:43:08,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-03 01:43:08,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) 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 01:43:08,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2022-11-03 01:43:08,519 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 12 [2022-11-03 01:43:08,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:08,520 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2022-11-03 01:43:08,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:08,520 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2022-11-03 01:43:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 01:43:08,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:08,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:08,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:43:08,522 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:08,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:08,523 INFO L85 PathProgramCache]: Analyzing trace with hash -390840427, now seen corresponding path program 1 times [2022-11-03 01:43:08,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:08,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36810079] [2022-11-03 01:43:08,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:08,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:08,660 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 01:43:08,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:08,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36810079] [2022-11-03 01:43:08,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36810079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:08,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846393351] [2022-11-03 01:43:08,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:08,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:08,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:08,663 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:08,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:43:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:08,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:43:08,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:43:08,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:08,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846393351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:08,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:43:08,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-03 01:43:08,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901659702] [2022-11-03 01:43:08,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:08,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:43:08,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:08,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:43:08,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:08,843 INFO L87 Difference]: Start difference. First operand 15 states and 23 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 01:43:08,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:08,912 INFO L93 Difference]: Finished difference Result 33 states and 54 transitions. [2022-11-03 01:43:08,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:43:08,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 01:43:08,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:08,917 INFO L225 Difference]: With dead ends: 33 [2022-11-03 01:43:08,917 INFO L226 Difference]: Without dead ends: 22 [2022-11-03 01:43:08,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:08,926 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:08,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-03 01:43:08,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-03 01:43:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 01:43:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-11-03 01:43:08,937 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2022-11-03 01:43:08,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:08,938 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-11-03 01:43:08,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 01:43:08,938 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-11-03 01:43:08,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 01:43:08,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:08,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:08,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:09,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:09,154 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:09,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:09,154 INFO L85 PathProgramCache]: Analyzing trace with hash -626731024, now seen corresponding path program 1 times [2022-11-03 01:43:09,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:09,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849009779] [2022-11-03 01:43:09,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:09,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:43:09,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:09,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849009779] [2022-11-03 01:43:09,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849009779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:09,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212912237] [2022-11-03 01:43:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:09,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:09,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:09,270 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:09,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:43:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:09,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:43:09,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:43:09,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:43:09,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212912237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:09,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [182050915] [2022-11-03 01:43:09,499 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 01:43:09,499 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:09,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:09,508 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:09,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:09,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:09,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:09,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:09,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:09,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:09,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:09,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:09,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:10,391 INFO L356 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-03 01:43:10,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-03 01:43:10,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:10,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:10,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:10,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:10,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:10,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:10,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:10,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:10,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 53 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 57 [2022-11-03 01:43:10,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:10,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 01:43:11,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:11,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:11,420 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:43:11,421 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 746 treesize of output 745 [2022-11-03 01:43:12,205 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 01:43:12,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:12,248 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:12,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:12,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:12,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:12,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:12,331 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:12,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:12,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:12,400 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:12,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:12,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:12,434 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:12,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:12,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:12,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:12,516 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:12,517 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 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:12,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:12,592 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:12,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:12,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:12,635 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:12,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:12,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:12,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:12,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:12,712 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:12,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:12,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:12,781 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:12,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:12,828 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:12,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:12,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:12,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:12,977 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:43:12,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:43:13,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:13,139 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:13,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:13,179 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:13,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:13,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:13,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:13,296 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:43:13,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-03 01:43:13,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:13,406 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:13,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:13,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:13,446 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:13,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:13,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:13,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:13,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:13,520 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:13,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:13,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:13,579 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:13,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:13,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:13,627 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:13,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:13,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:13,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:13,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:13,701 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:13,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:13,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:13,759 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:13,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:13,783 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:14,136 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '351#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:14,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:14,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:43:14,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-03 01:43:14,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745763555] [2022-11-03 01:43:14,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:14,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:43:14,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:14,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:43:14,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:43:14,139 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:14,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:14,229 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2022-11-03 01:43:14,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:43:14,231 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 01:43:14,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:14,231 INFO L225 Difference]: With dead ends: 44 [2022-11-03 01:43:14,232 INFO L226 Difference]: Without dead ends: 25 [2022-11-03 01:43:14,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:43:14,233 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:14,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:14,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-03 01:43:14,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-03 01:43:14,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-11-03 01:43:14,238 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 20 [2022-11-03 01:43:14,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:14,238 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-11-03 01:43:14,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:14,239 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-11-03 01:43:14,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 01:43:14,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:14,239 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:14,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:14,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:14,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:14,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:14,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1362752313, now seen corresponding path program 2 times [2022-11-03 01:43:14,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:14,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828529126] [2022-11-03 01:43:14,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:14,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:43:14,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:14,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828529126] [2022-11-03 01:43:14,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828529126] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:14,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880822244] [2022-11-03 01:43:14,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:43:14,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:14,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:14,566 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:14,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:43:14,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:43:14,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:14,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:43:14,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:43:14,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:43:14,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880822244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:14,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [762686274] [2022-11-03 01:43:14,774 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 01:43:14,775 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:14,776 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:14,776 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:14,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:14,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:14,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:14,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:14,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:14,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:14,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:14,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:14,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,482 INFO L356 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-03 01:43:15,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-03 01:43:15,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 53 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 57 [2022-11-03 01:43:15,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 01:43:16,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:16,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:16,091 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:43:16,091 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 756 treesize of output 744 [2022-11-03 01:43:16,426 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 01:43:16,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:16,459 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:16,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:16,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:16,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:16,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:16,526 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:16,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:16,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:16,603 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:16,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:16,635 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:16,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:16,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:16,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:16,761 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:43:16,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-03 01:43:16,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:16,885 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:16,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:16,925 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:16,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:16,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:16,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:17,036 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:43:17,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:43:17,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:17,153 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:17,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:17,189 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:17,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:17,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:17,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:17,349 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:43:17,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:43:17,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:17,465 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:17,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:17,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:17,512 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:17,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:17,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:17,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:17,574 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:17,574 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 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:17,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:17,633 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:17,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:17,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:17,672 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:17,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:17,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:17,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:17,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:17,740 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:17,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:17,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:17,796 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:17,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:17,833 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:17,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:17,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:17,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:17,945 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:43:17,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:43:18,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:18,056 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:18,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:18,076 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:18,411 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '619#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:18,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:18,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:43:18,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-03 01:43:18,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418546743] [2022-11-03 01:43:18,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:18,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:43:18,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:18,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:43:18,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:43:18,413 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:18,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:18,571 INFO L93 Difference]: Finished difference Result 63 states and 98 transitions. [2022-11-03 01:43:18,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:43:18,572 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-03 01:43:18,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:18,573 INFO L225 Difference]: With dead ends: 63 [2022-11-03 01:43:18,573 INFO L226 Difference]: Without dead ends: 46 [2022-11-03 01:43:18,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:43:18,574 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:18,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-03 01:43:18,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-03 01:43:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 01:43:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-11-03 01:43:18,581 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 23 [2022-11-03 01:43:18,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:18,581 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-11-03 01:43:18,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:18,582 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-11-03 01:43:18,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 01:43:18,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:18,583 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:18,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:18,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:18,789 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:18,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:18,790 INFO L85 PathProgramCache]: Analyzing trace with hash -269011234, now seen corresponding path program 3 times [2022-11-03 01:43:18,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:18,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187606962] [2022-11-03 01:43:18,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:18,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 01:43:19,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:19,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187606962] [2022-11-03 01:43:19,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187606962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:19,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625033204] [2022-11-03 01:43:19,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:43:19,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:19,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:19,043 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:19,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:43:19,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:43:19,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:19,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:43:19,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 01:43:19,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 01:43:19,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625033204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:19,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [100402246] [2022-11-03 01:43:19,305 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 01:43:19,305 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:19,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:19,306 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:19,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:19,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:19,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:19,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:19,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:19,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:19,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:19,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:19,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:19,780 INFO L356 Elim1Store]: treesize reduction 703, result has 8.6 percent of original size [2022-11-03 01:43:19,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 17 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 82 [2022-11-03 01:43:19,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:19,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:19,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:19,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:19,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:19,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:19,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:19,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:20,454 INFO L356 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-03 01:43:20,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-03 01:43:20,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:20,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 01:43:20,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:20,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:21,002 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:43:21,002 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 746 treesize of output 745 [2022-11-03 01:43:21,572 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 01:43:21,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:21,605 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:21,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:21,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:21,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:21,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:21,665 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:21,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:21,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:21,721 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:21,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:21,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:21,752 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:21,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:21,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:21,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:21,818 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:21,818 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 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:21,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:21,868 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:21,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:21,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:21,900 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:21,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:21,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:21,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:21,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:21,963 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:21,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:22,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:22,016 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:22,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:22,046 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:22,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:22,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:22,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:22,137 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:43:22,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-03 01:43:22,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:22,236 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:22,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:22,265 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:22,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:22,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:22,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:22,365 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:43:22,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:43:22,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:22,455 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:22,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:22,487 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:22,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:22,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:22,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:22,593 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:43:22,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:43:22,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:22,672 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:22,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:22,705 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:22,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:22,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:22,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:22,806 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:43:22,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:43:22,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:22,908 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:22,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:22,927 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:23,274 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1099#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:23,274 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:23,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:43:23,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-03 01:43:23,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814661736] [2022-11-03 01:43:23,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:23,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:43:23,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:23,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:43:23,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:43:23,276 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:23,389 INFO L93 Difference]: Finished difference Result 92 states and 113 transitions. [2022-11-03 01:43:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:43:23,390 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-03 01:43:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:23,390 INFO L225 Difference]: With dead ends: 92 [2022-11-03 01:43:23,390 INFO L226 Difference]: Without dead ends: 52 [2022-11-03 01:43:23,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:43:23,392 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:23,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:23,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-03 01:43:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-03 01:43:23,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:23,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-11-03 01:43:23,400 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 44 [2022-11-03 01:43:23,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:23,400 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-11-03 01:43:23,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:23,400 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-11-03 01:43:23,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 01:43:23,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:23,402 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:23,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:23,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:23,605 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:23,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:23,606 INFO L85 PathProgramCache]: Analyzing trace with hash -644312194, now seen corresponding path program 4 times [2022-11-03 01:43:23,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:23,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820051123] [2022-11-03 01:43:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:23,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 01:43:23,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:23,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820051123] [2022-11-03 01:43:23,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820051123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:23,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727927913] [2022-11-03 01:43:23,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:43:23,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:23,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:23,983 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:24,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:43:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:24,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:43:24,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 01:43:24,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 01:43:24,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727927913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:24,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1519430160] [2022-11-03 01:43:24,428 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 01:43:24,428 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:24,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:24,429 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:24,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:24,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,013 INFO L356 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-03 01:43:25,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-03 01:43:25,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 53 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 57 [2022-11-03 01:43:25,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 01:43:25,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:25,541 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:43:25,541 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 746 treesize of output 745 [2022-11-03 01:43:26,033 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 01:43:26,065 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:26,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:26,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,173 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:43:26,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:43:26,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,275 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:26,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:26,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,305 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:26,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:26,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:26,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,362 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:26,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:26,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,410 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:26,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:26,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,441 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:26,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:26,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:26,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,499 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:26,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:26,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,560 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:26,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:26,592 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:26,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:26,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,694 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:43:26,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-03 01:43:26,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,792 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:26,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:26,828 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:26,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:26,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,953 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:43:26,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-03 01:43:27,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:27,047 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:27,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:27,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:27,078 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:27,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:27,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:27,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:27,141 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:27,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:27,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:27,190 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:27,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:27,220 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:27,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:27,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:27,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:27,311 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:43:27,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-03 01:43:27,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:27,390 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:27,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:27,411 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:27,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1697#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:27,752 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:27,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:43:27,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-03 01:43:27,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985028019] [2022-11-03 01:43:27,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:27,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 01:43:27,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:27,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 01:43:27,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:43:27,754 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:27,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:27,880 INFO L93 Difference]: Finished difference Result 104 states and 131 transitions. [2022-11-03 01:43:27,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 01:43:27,881 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-03 01:43:27,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:27,882 INFO L225 Difference]: With dead ends: 104 [2022-11-03 01:43:27,882 INFO L226 Difference]: Without dead ends: 64 [2022-11-03 01:43:27,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:43:27,883 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:27,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:27,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-03 01:43:27,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-03 01:43:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:27,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-11-03 01:43:27,891 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 50 [2022-11-03 01:43:27,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:27,891 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-11-03 01:43:27,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-11-03 01:43:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 01:43:27,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:27,893 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:27,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:28,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:28,109 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:28,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:28,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1140497218, now seen corresponding path program 5 times [2022-11-03 01:43:28,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:28,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856877182] [2022-11-03 01:43:28,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:28,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 01:43:28,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:28,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856877182] [2022-11-03 01:43:28,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856877182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:28,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145880381] [2022-11-03 01:43:28,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:43:28,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:28,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:28,985 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:29,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:43:29,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:43:29,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:29,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:43:29,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-11-03 01:43:29,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-11-03 01:43:29,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145880381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:29,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [424505589] [2022-11-03 01:43:29,703 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 01:43:29,703 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:29,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:29,703 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:29,703 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:29,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:30,280 INFO L356 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-03 01:43:30,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-03 01:43:30,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:30,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:30,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:30,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:30,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:30,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:30,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:30,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:30,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 53 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 57 [2022-11-03 01:43:30,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:30,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 01:43:30,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:30,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:30,717 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:43:30,717 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 746 treesize of output 745 [2022-11-03 01:43:31,230 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 01:43:31,263 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:31,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:31,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:31,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:31,378 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:43:31,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-03 01:43:31,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:31,460 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:31,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:31,496 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:31,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:31,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:31,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:31,589 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:43:31,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:43:31,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:31,706 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:31,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:31,735 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:31,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:31,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:31,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:31,851 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:43:31,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:43:31,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:31,932 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:31,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:31,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:31,963 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:31,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:32,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:32,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:32,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:32,019 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:32,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:32,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:32,091 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:32,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:32,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:32,138 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:32,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:32,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:32,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:32,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:32,209 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:32,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:32,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:32,263 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:32,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:32,294 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:32,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:32,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:32,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:32,414 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:43:32,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:43:32,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:32,509 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:32,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:32,547 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:32,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:32,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:32,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:32,644 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:43:32,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-03 01:43:32,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:32,716 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:32,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:32,738 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:33,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2425#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:33,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:33,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:43:33,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-03 01:43:33,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106559589] [2022-11-03 01:43:33,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:33,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 01:43:33,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:33,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 01:43:33,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 01:43:33,527 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:33,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:33,867 INFO L93 Difference]: Finished difference Result 147 states and 205 transitions. [2022-11-03 01:43:33,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 01:43:33,868 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-03 01:43:33,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:33,873 INFO L225 Difference]: With dead ends: 147 [2022-11-03 01:43:33,873 INFO L226 Difference]: Without dead ends: 107 [2022-11-03 01:43:33,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 01:43:33,876 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:33,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:43:33,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-03 01:43:33,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-11-03 01:43:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0849056603773586) internal successors, (115), 106 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 01:43:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2022-11-03 01:43:33,912 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 62 [2022-11-03 01:43:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:33,914 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2022-11-03 01:43:33,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:33,915 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2022-11-03 01:43:33,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-03 01:43:33,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:33,917 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:33,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:34,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 01:43:34,137 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:34,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:34,138 INFO L85 PathProgramCache]: Analyzing trace with hash -603243691, now seen corresponding path program 6 times [2022-11-03 01:43:34,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:34,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778381743] [2022-11-03 01:43:34,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:34,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-03 01:43:35,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:35,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778381743] [2022-11-03 01:43:35,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778381743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:35,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352179313] [2022-11-03 01:43:35,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:43:35,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:35,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:35,305 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:35,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:43:35,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:43:35,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:35,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 01:43:35,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-03 01:43:35,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-03 01:43:36,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352179313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:36,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1228636538] [2022-11-03 01:43:36,447 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 01:43:36,447 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:36,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:36,448 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:36,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:36,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,820 INFO L356 Elim1Store]: treesize reduction 703, result has 8.6 percent of original size [2022-11-03 01:43:36,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 17 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 82 [2022-11-03 01:43:36,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:37,476 INFO L356 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-03 01:43:37,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-03 01:43:37,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:37,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 01:43:37,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:37,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:37,958 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:43:37,958 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 756 treesize of output 744 [2022-11-03 01:43:38,207 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 01:43:38,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,237 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:38,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:38,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,296 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:38,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:38,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,344 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:38,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:38,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,372 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:38,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:38,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,434 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:38,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:38,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,482 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:38,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:38,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,513 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:38,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:38,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,568 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:38,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:38,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,644 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:38,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:38,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,678 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:38,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:38,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,747 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:38,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:38,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,827 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:38,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:38,897 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:38,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:38,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,989 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:43:38,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:43:39,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:39,060 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:39,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:39,087 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:39,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:39,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:39,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:39,181 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:43:39,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:43:39,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:39,270 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:39,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:39,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:39,299 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:39,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:39,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:39,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:39,357 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:39,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:39,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:39,406 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:39,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:39,425 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:40,345 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3599#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:40,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:40,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:43:40,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-03 01:43:40,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333879039] [2022-11-03 01:43:40,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:40,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-03 01:43:40,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:40,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-03 01:43:40,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 01:43:40,350 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:40,521 INFO L93 Difference]: Finished difference Result 214 states and 254 transitions. [2022-11-03 01:43:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-03 01:43:40,522 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-11-03 01:43:40,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:40,523 INFO L225 Difference]: With dead ends: 214 [2022-11-03 01:43:40,523 INFO L226 Difference]: Without dead ends: 132 [2022-11-03 01:43:40,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 273 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 01:43:40,525 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:40,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:40,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-03 01:43:40,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-11-03 01:43:40,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0687022900763359) internal successors, (140), 131 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 01:43:40,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2022-11-03 01:43:40,536 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 105 [2022-11-03 01:43:40,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:40,536 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2022-11-03 01:43:40,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:40,537 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2022-11-03 01:43:40,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 01:43:40,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:40,539 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:40,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:40,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 01:43:40,765 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:40,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:40,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1766510978, now seen corresponding path program 7 times [2022-11-03 01:43:40,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:40,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591310886] [2022-11-03 01:43:40,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:40,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1561 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-03 01:43:43,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:43,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591310886] [2022-11-03 01:43:43,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591310886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:43,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984731316] [2022-11-03 01:43:43,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:43:43,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:43,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:43,701 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:43,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:43:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:44,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 01:43:44,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1561 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-03 01:43:44,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1561 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-03 01:43:47,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984731316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:47,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1808582691] [2022-11-03 01:43:47,185 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 01:43:47,186 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:47,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:47,186 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:47,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:47,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:47,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:47,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:47,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:47,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:47,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:47,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:47,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:47,767 INFO L356 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-03 01:43:47,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-03 01:43:47,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:47,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:47,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:47,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:47,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:47,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:47,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:47,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:47,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 53 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 57 [2022-11-03 01:43:47,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:47,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 01:43:48,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:48,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:48,199 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:43:48,199 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 746 treesize of output 745 [2022-11-03 01:43:48,608 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 01:43:48,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:48,636 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:48,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:48,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:48,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:48,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:48,685 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:48,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:48,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:48,769 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:48,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:48,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:48,806 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:48,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:48,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:48,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:48,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:48,870 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:48,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:48,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:48,920 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:48,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:48,950 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:48,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:43:48,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:48,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,036 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:43:49,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:43:49,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,135 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:49,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:49,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,168 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:49,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:49,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:49,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,220 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:49,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:49,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,291 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:49,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:49,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,338 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:49,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:49,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,388 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:49,389 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 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:49,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,437 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:49,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:49,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,468 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:49,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:49,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:49,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,526 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:49,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:49,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,585 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:49,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:49,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,613 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:49,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:49,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,680 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:43:49,680 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 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:43:49,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:49,732 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:43:49,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:43:49,752 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:51,143 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5157#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:51,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:51,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:43:51,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-03 01:43:51,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228795278] [2022-11-03 01:43:51,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:51,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-03 01:43:51,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:51,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-03 01:43:51,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-03 01:43:51,153 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand has 101 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 100 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:51,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:51,414 INFO L93 Difference]: Finished difference Result 264 states and 329 transitions. [2022-11-03 01:43:51,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-03 01:43:51,415 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 100 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2022-11-03 01:43:51,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:51,416 INFO L225 Difference]: With dead ends: 264 [2022-11-03 01:43:51,416 INFO L226 Difference]: Without dead ends: 182 [2022-11-03 01:43:51,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 323 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-03 01:43:51,422 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:51,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:43:51,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-03 01:43:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-11-03 01:43:51,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.0497237569060773) internal successors, (190), 181 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 01:43:51,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 190 transitions. [2022-11-03 01:43:51,442 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 190 transitions. Word has length 130 [2022-11-03 01:43:51,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:51,443 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 190 transitions. [2022-11-03 01:43:51,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 100 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:51,443 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 190 transitions. [2022-11-03 01:43:51,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-03 01:43:51,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:51,446 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:51,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:51,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:51,657 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:51,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:51,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1322246750, now seen corresponding path program 8 times [2022-11-03 01:43:51,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:51,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281298808] [2022-11-03 01:43:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:51,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5236 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-03 01:43:59,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:59,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281298808] [2022-11-03 01:43:59,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281298808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:59,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675633506] [2022-11-03 01:43:59,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:43:59,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:59,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:59,799 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:59,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:44:08,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-03 01:44:08,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:08,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:44:08,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5236 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5181 trivial. 0 not checked. [2022-11-03 01:44:09,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5236 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5181 trivial. 0 not checked. [2022-11-03 01:44:09,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675633506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:09,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1609714517] [2022-11-03 01:44:09,733 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 01:44:09,734 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:09,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:09,734 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:09,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:09,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:09,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:09,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:09,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:09,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:09,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:09,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:09,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,125 INFO L356 Elim1Store]: treesize reduction 703, result has 8.6 percent of original size [2022-11-03 01:44:10,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 17 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 82 [2022-11-03 01:44:10,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,736 INFO L356 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-03 01:44:10,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-03 01:44:10,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:10,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 01:44:11,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:11,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:11,104 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:44:11,105 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 756 treesize of output 744 [2022-11-03 01:44:11,304 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 01:44:11,330 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:11,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:11,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:11,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:11,407 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:44:11,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-03 01:44:11,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:11,474 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:11,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:11,500 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:11,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:11,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:11,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:11,588 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:44:11,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:44:11,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:11,651 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:11,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:11,683 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:11,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:11,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:11,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:11,780 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:44:11,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:44:11,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:11,870 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:11,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:11,897 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:11,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:11,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:11,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:11,994 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:44:11,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:44:12,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:12,093 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:12,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:12,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:12,123 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:12,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:12,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:12,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:12,178 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:12,178 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 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:44:12,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:12,227 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:12,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:12,254 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:12,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:12,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:12,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:12,341 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:44:12,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:44:12,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:12,444 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:12,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:12,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:12,473 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:12,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:12,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:12,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:12,523 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:12,523 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 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:44:12,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:12,581 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:12,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:12,602 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:13,396 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7237#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:13,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:13,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:44:13,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-03 01:44:13,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145141096] [2022-11-03 01:44:13,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:13,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-03 01:44:13,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:13,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-03 01:44:13,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-03 01:44:13,406 INFO L87 Difference]: Start difference. First operand 182 states and 190 transitions. Second operand has 123 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 123 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:14,125 INFO L93 Difference]: Finished difference Result 349 states and 449 transitions. [2022-11-03 01:44:14,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-03 01:44:14,126 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 123 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2022-11-03 01:44:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:14,127 INFO L225 Difference]: With dead ends: 349 [2022-11-03 01:44:14,127 INFO L226 Difference]: Without dead ends: 267 [2022-11-03 01:44:14,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-03 01:44:14,132 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:14,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:44:14,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-03 01:44:14,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2022-11-03 01:44:14,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.0338345864661653) internal successors, (275), 266 states have internal predecessors, (275), 0 states have call successors, (0), 0 states 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 01:44:14,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 275 transitions. [2022-11-03 01:44:14,145 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 275 transitions. Word has length 180 [2022-11-03 01:44:14,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:14,146 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 275 transitions. [2022-11-03 01:44:14,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 123 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:14,147 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 275 transitions. [2022-11-03 01:44:14,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-11-03 01:44:14,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:14,151 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:14,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:14,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 01:44:14,373 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:14,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:14,374 INFO L85 PathProgramCache]: Analyzing trace with hash -65948331, now seen corresponding path program 9 times [2022-11-03 01:44:14,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:14,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173830122] [2022-11-03 01:44:14,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:14,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6721 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-11-03 01:44:22,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:22,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173830122] [2022-11-03 01:44:22,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173830122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:22,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739493222] [2022-11-03 01:44:22,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:44:22,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:22,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:22,896 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:22,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:44:23,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:44:23,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:23,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-03 01:44:23,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6721 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-11-03 01:44:23,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6721 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-11-03 01:44:35,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739493222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:35,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [911070034] [2022-11-03 01:44:35,539 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 01:44:35,539 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:35,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:35,540 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:35,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:35,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:35,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:35,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:35,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:35,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:35,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:35,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:35,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:35,917 INFO L356 Elim1Store]: treesize reduction 703, result has 8.6 percent of original size [2022-11-03 01:44:35,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 17 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 82 [2022-11-03 01:44:35,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:35,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:35,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:36,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:36,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:36,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:36,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:36,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:36,528 INFO L356 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-03 01:44:36,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-03 01:44:36,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:36,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 01:44:36,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:36,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:36,908 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:44:36,909 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 756 treesize of output 744 [2022-11-03 01:44:37,096 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 01:44:37,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,126 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:37,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:37,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:37,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,180 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:37,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:44:37,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,230 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:37,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:37,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,262 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:37,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:37,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:37,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,322 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:37,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:44:37,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,371 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:37,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:37,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,400 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:37,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:37,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:37,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,459 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:37,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:44:37,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,505 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:37,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:37,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,534 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:37,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:37,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:37,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,589 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:37,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:44:37,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,652 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:37,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:37,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,708 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:37,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:37,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:37,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,768 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:44:37,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:44:37,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,818 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:37,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:37,847 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:37,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:37,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:37,931 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:44:37,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:44:37,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:38,001 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:38,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:38,030 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:44:38,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:44:38,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:38,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:38,125 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:44:38,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-03 01:44:38,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:38,197 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:44:38,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:44:38,215 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:42,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10247#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:42,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:42,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:44:42,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-03 01:44:42,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853802003] [2022-11-03 01:44:42,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:42,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-03 01:44:42,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:42,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-03 01:44:42,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-03 01:44:42,373 INFO L87 Difference]: Start difference. First operand 267 states and 275 transitions. Second operand has 203 states, 203 states have (on average 1.0886699507389161) internal successors, (221), 202 states have internal predecessors, (221), 0 states have call successors, (0), 0 states 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 01:44:42,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:42,942 INFO L93 Difference]: Finished difference Result 534 states and 650 transitions. [2022-11-03 01:44:42,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-03 01:44:42,943 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0886699507389161) internal successors, (221), 202 states have internal predecessors, (221), 0 states have call successors, (0), 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 265 [2022-11-03 01:44:42,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:42,947 INFO L225 Difference]: With dead ends: 534 [2022-11-03 01:44:42,947 INFO L226 Difference]: Without dead ends: 368 [2022-11-03 01:44:42,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 665 SyntacticMatches, 23 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8796 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-03 01:44:42,952 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:42,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:44:42,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-11-03 01:44:42,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2022-11-03 01:44:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.0245231607629428) internal successors, (376), 367 states have internal predecessors, (376), 0 states have call successors, (0), 0 states 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 01:44:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 376 transitions. [2022-11-03 01:44:42,968 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 376 transitions. Word has length 265 [2022-11-03 01:44:42,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:42,969 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 376 transitions. [2022-11-03 01:44:42,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0886699507389161) internal successors, (221), 202 states have internal predecessors, (221), 0 states have call successors, (0), 0 states 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 01:44:42,970 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 376 transitions. [2022-11-03 01:44:42,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-11-03 01:44:42,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:42,976 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:43,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:43,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:43,197 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:43,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:43,198 INFO L85 PathProgramCache]: Analyzing trace with hash 396878270, now seen corresponding path program 10 times [2022-11-03 01:44:43,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:43,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108235793] [2022-11-03 01:44:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:43,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21871 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-11-03 01:45:10,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:10,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108235793] [2022-11-03 01:45:10,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108235793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:10,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502899901] [2022-11-03 01:45:10,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:45:10,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:10,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:10,830 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:10,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:45:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:11,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 3075 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-03 01:45:11,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21871 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-11-03 01:45:12,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21871 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-11-03 01:45:59,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502899901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:59,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [337930958] [2022-11-03 01:45:59,741 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 01:45:59,741 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:45:59,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:45:59,741 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:45:59,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:45:59,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:59,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:59,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:59,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:59,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:59,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:59,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:59,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:00,136 INFO L356 Elim1Store]: treesize reduction 703, result has 8.6 percent of original size [2022-11-03 01:46:00,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 17 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 82 [2022-11-03 01:46:00,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:00,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:00,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:00,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:00,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:00,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:00,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:00,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:00,695 INFO L356 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-03 01:46:00,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-03 01:46:00,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:00,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 01:46:01,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:01,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:01,074 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:46:01,075 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 746 treesize of output 745 [2022-11-03 01:46:01,475 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 01:46:01,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:01,502 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:01,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:01,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:01,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:01,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:01,556 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:46:01,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:46:01,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:01,603 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:01,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:01,629 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:46:01,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:46:01,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:01,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:01,719 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 01:46:01,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-03 01:46:01,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:01,791 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:01,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:01,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:01,819 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:01,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:01,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:01,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:01,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:01,869 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:46:01,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:46:01,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:01,921 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:01,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:01,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:01,948 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:01,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:01,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:01,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:01,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:02,004 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:46:02,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:46:02,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:02,073 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:02,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:02,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:02,147 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:02,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:02,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:02,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:02,198 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:46:02,199 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 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:46:02,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:02,249 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:02,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:02,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:02,279 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:02,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:02,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:02,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:02,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:02,347 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 01:46:02,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-03 01:46:02,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:02,395 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:02,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:02,423 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:46:02,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 01:46:02,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:02,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:02,516 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 01:46:02,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-03 01:46:02,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:02,617 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:46:02,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:46:02,637 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:46:10,416 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14637#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:46:10,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:46:10,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:46:10,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-03 01:46:10,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654754663] [2022-11-03 01:46:10,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:46:10,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-03 01:46:10,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:46:10,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-03 01:46:10,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-03 01:46:10,439 INFO L87 Difference]: Start difference. First operand 368 states and 376 transitions. Second operand has 405 states, 405 states have (on average 1.0444444444444445) internal successors, (423), 404 states have internal predecessors, (423), 0 states have call successors, (0), 0 states 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 01:46:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:13,285 INFO L93 Difference]: Finished difference Result 736 states and 953 transitions. [2022-11-03 01:46:13,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-03 01:46:13,286 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0444444444444445) internal successors, (423), 404 states have internal predecessors, (423), 0 states have call successors, (0), 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 366 [2022-11-03 01:46:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:13,288 INFO L225 Difference]: With dead ends: 736 [2022-11-03 01:46:13,288 INFO L226 Difference]: Without dead ends: 570 [2022-11-03 01:46:13,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1298 GetRequests, 867 SyntacticMatches, 23 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17684 ImplicationChecksByTransitivity, 70.6s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-03 01:46:13,298 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:13,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:46:13,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-11-03 01:46:13,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2022-11-03 01:46:13,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 1.015817223198594) internal successors, (578), 569 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 01:46:13,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 578 transitions. [2022-11-03 01:46:13,318 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 578 transitions. Word has length 366 [2022-11-03 01:46:13,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:13,318 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 578 transitions. [2022-11-03 01:46:13,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0444444444444445) internal successors, (423), 404 states have internal predecessors, (423), 0 states have call successors, (0), 0 states 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 01:46:13,319 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 578 transitions. [2022-11-03 01:46:13,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2022-11-03 01:46:13,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:13,333 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:13,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:13,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 01:46:13,549 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:13,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:13,549 INFO L85 PathProgramCache]: Analyzing trace with hash -774021090, now seen corresponding path program 11 times [2022-11-03 01:46:13,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:46:13,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135059084] [2022-11-03 01:46:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:13,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:46:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 82774 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-11-03 01:48:01,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:01,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135059084] [2022-11-03 01:48:01,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135059084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:01,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875505118] [2022-11-03 01:48:01,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:48:01,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:01,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:01,301 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:01,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc38ae71-5300-4b91-a32a-299e55101d23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process