./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/pcompf.c --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_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/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_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/pcompf.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/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_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/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 f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 --- 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 01:37:49,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:37:49,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:37:49,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:37:49,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:37:49,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:37:49,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:37:49,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:37:49,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:37:49,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:37:49,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:37:49,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:37:49,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:37:49,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:37:49,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:37:49,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:37:49,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:37:49,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:37:49,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:37:49,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:37:49,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:37:49,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:37:49,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:37:49,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:37:49,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:37:49,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:37:49,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:37:49,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:37:49,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:37:49,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:37:49,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:37:49,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:37:49,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:37:49,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:37:49,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:37:49,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:37:49,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:37:49,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:37:49,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:37:49,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:37:49,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:37:49,528 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:37:49,562 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:37:49,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:37:49,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:37:49,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:37:49,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:37:49,564 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:37:49,564 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:37:49,564 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:37:49,564 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:37:49,564 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:37:49,565 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:37:49,565 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:37:49,565 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:37:49,565 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:37:49,565 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:37:49,566 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:37:49,566 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:37:49,566 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:37:49,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:37:49,567 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:37:49,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:37:49,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:37:49,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:37:49,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:37:49,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:37:49,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:37:49,568 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:37:49,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:37:49,568 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:37:49,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:37:49,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:37:49,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:37:49,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:37:49,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:37:49,569 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:37:49,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:37:49,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:37:49,570 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:37:49,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:37:49,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:37:49,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:37:49,571 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_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 [2022-11-03 01:37:49,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:37:49,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:37:49,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:37:49,897 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:37:49,898 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:37:49,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-fpi/pcompf.c [2022-11-03 01:37:49,968 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/data/80182c6ed/080c4c7ecba74bdc8600ecf3c52c4b2d/FLAGa80aadecb [2022-11-03 01:37:50,478 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:37:50,481 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/sv-benchmarks/c/array-fpi/pcompf.c [2022-11-03 01:37:50,491 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/data/80182c6ed/080c4c7ecba74bdc8600ecf3c52c4b2d/FLAGa80aadecb [2022-11-03 01:37:50,852 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/data/80182c6ed/080c4c7ecba74bdc8600ecf3c52c4b2d [2022-11-03 01:37:50,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:37:50,859 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:37:50,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:37:50,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:37:50,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:37:50,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:37:50" (1/1) ... [2022-11-03 01:37:50,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7521d1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:50, skipping insertion in model container [2022-11-03 01:37:50,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:37:50" (1/1) ... [2022-11-03 01:37:50,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:37:50,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:37:51,070 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_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2022-11-03 01:37:51,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:37:51,126 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:37:51,140 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_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2022-11-03 01:37:51,172 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:37:51,184 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:37:51,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:51 WrapperNode [2022-11-03 01:37:51,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:37:51,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:37:51,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:37:51,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:37:51,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:51" (1/1) ... [2022-11-03 01:37:51,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:51" (1/1) ... [2022-11-03 01:37:51,240 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2022-11-03 01:37:51,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:37:51,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:37:51,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:37:51,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:37:51,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:51" (1/1) ... [2022-11-03 01:37:51,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:51" (1/1) ... [2022-11-03 01:37:51,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:51" (1/1) ... [2022-11-03 01:37:51,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:51" (1/1) ... [2022-11-03 01:37:51,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:51" (1/1) ... [2022-11-03 01:37:51,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:51" (1/1) ... [2022-11-03 01:37:51,284 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:51" (1/1) ... [2022-11-03 01:37:51,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:51" (1/1) ... [2022-11-03 01:37:51,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:37:51,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:37:51,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:37:51,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:37:51,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:51" (1/1) ... [2022-11-03 01:37:51,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:37:51,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:37:51,327 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:37:51,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:37:51,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:37:51,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:37:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:37:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:37:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:37:51,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:37:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:37:51,446 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:37:51,448 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:37:51,644 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:37:51,687 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:37:51,688 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 01:37:51,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:37:51 BoogieIcfgContainer [2022-11-03 01:37:51,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:37:51,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:37:51,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:37:51,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:37:51,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:37:50" (1/3) ... [2022-11-03 01:37:51,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140c6e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:37:51, skipping insertion in model container [2022-11-03 01:37:51,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:51" (2/3) ... [2022-11-03 01:37:51,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140c6e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:37:51, skipping insertion in model container [2022-11-03 01:37:51,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:37:51" (3/3) ... [2022-11-03 01:37:51,699 INFO L112 eAbstractionObserver]: Analyzing ICFG pcompf.c [2022-11-03 01:37:51,719 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:37:51,720 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:37:51,771 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:37:51,779 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;@4e20c8d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:37:51,779 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:37:51,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:51,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:37:51,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:37:51,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:37:51,792 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:37:51,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:37:51,801 INFO L85 PathProgramCache]: Analyzing trace with hash 697271499, now seen corresponding path program 1 times [2022-11-03 01:37:51,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:37:51,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286608637] [2022-11-03 01:37:51,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:51,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:37:52,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:37:52,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632469339] [2022-11-03 01:37:52,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:52,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:37:52,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:37:52,013 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:37:52,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:37:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:37:52,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:37:52,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:37:52,547 INFO L356 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-11-03 01:37:52,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 229 [2022-11-03 01:37:52,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-03 01:37:52,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-03 01:37:52,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-03 01:37:52,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:37:52,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:37:52,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 86 [2022-11-03 01:37:52,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:37:52,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:37:52,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:37:52,972 INFO L356 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-11-03 01:37:52,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 92 [2022-11-03 01:37:53,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:37:53,357 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 0 case distinctions, treesize of input 16 treesize of output 5 [2022-11-03 01:37:53,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:37:53,434 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 01:37:53,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:37:53,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:37:53,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286608637] [2022-11-03 01:37:53,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:37:53,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632469339] [2022-11-03 01:37:53,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632469339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:37:53,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:37:53,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:37:53,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680942283] [2022-11-03 01:37:53,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:37:53,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:37:53,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:37:53,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:37:53,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:37:53,474 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:53,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:37:53,639 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-11-03 01:37:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:37:53,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 01:37:53,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:37:53,655 INFO L225 Difference]: With dead ends: 37 [2022-11-03 01:37:53,656 INFO L226 Difference]: Without dead ends: 22 [2022-11-03 01:37:53,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:37:53,668 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:37:53,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:37:53,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-03 01:37:53,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2022-11-03 01:37:53,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:53,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2022-11-03 01:37:53,706 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 21 transitions. Word has length 8 [2022-11-03 01:37:53,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:37:53,707 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 21 transitions. [2022-11-03 01:37:53,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:53,707 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 21 transitions. [2022-11-03 01:37:53,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:37:53,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:37:53,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:37:53,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:37:53,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:37:53,934 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:37:53,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:37:53,934 INFO L85 PathProgramCache]: Analyzing trace with hash 131371694, now seen corresponding path program 1 times [2022-11-03 01:37:53,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:37:53,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671796341] [2022-11-03 01:37:53,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:53,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:37:53,973 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:37:53,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042862114] [2022-11-03 01:37:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:53,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:37:53,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:37:53,975 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:37:53,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:37:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:37:54,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:37:54,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:37:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:37:54,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:37:54,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:37:54,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671796341] [2022-11-03 01:37:54,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:37:54,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042862114] [2022-11-03 01:37:54,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042862114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:37:54,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:37:54,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:37:54,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731511893] [2022-11-03 01:37:54,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:37:54,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:37:54,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:37:54,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:37:54,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:37:54,113 INFO L87 Difference]: Start difference. First operand 15 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:54,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:37:54,205 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-11-03 01:37:54,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:37:54,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 01:37:54,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:37:54,207 INFO L225 Difference]: With dead ends: 36 [2022-11-03 01:37:54,207 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 01:37:54,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:37:54,209 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:37:54,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 12 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:37:54,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 01:37:54,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 17. [2022-11-03 01:37:54,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:54,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-11-03 01:37:54,215 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2022-11-03 01:37:54,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:37:54,216 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-03 01:37:54,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:54,217 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-11-03 01:37:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:37:54,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:37:54,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:37:54,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:37:54,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 01:37:54,439 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:37:54,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:37:54,440 INFO L85 PathProgramCache]: Analyzing trace with hash -197136011, now seen corresponding path program 1 times [2022-11-03 01:37:54,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:37:54,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574769446] [2022-11-03 01:37:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:54,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:37:54,485 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:37:54,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319019889] [2022-11-03 01:37:54,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:54,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:37:54,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:37:54,496 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:37:54,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:37:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:37:54,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:37:54,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:37:54,615 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 01:37:54,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:37:54,636 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 01:37:54,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:37:54,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574769446] [2022-11-03 01:37:54,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:37:54,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319019889] [2022-11-03 01:37:54,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319019889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:37:54,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1373313386] [2022-11-03 01:37:54,655 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:37:54,656 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:37:54,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:37:54,665 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:37:54,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:37:54,988 INFO L356 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-03 01:37:54,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-03 01:37:55,104 INFO L356 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-03 01:37:55,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-03 01:37:55,380 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-03 01:37:55,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-03 01:37:55,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:37:55,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:55,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-03 01:37:55,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:55,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:55,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:55,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:55,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:55,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:37:55,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:37:55,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:37:55,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:55,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:55,733 INFO L356 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-03 01:37:55,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-03 01:37:55,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-03 01:37:55,940 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:37:56,441 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '288#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= ~N~0 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:37:56,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:37:56,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:37:56,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-11-03 01:37:56,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623521091] [2022-11-03 01:37:56,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:37:56,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:37:56,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:37:56,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:37:56,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:37:56,444 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:56,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:37:56,542 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-11-03 01:37:56,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:37:56,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 01:37:56,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:37:56,544 INFO L225 Difference]: With dead ends: 33 [2022-11-03 01:37:56,544 INFO L226 Difference]: Without dead ends: 27 [2022-11-03 01:37:56,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:37:56,545 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:37:56,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 22 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:37:56,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-03 01:37:56,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2022-11-03 01:37:56,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-03 01:37:56,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2022-11-03 01:37:56,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:37:56,551 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-03 01:37:56,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:56,552 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-03 01:37:56,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:37:56,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:37:56,553 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:37:56,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:37:56,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:37:56,754 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:37:56,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:37:56,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1958511373, now seen corresponding path program 1 times [2022-11-03 01:37:56,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:37:56,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638795453] [2022-11-03 01:37:56,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:56,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:37:56,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:37:56,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561781100] [2022-11-03 01:37:56,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:56,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:37:56,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:37:56,792 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:37:56,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:37:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:37:56,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:37:56,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:37:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:37:56,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:37:56,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:37:56,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638795453] [2022-11-03 01:37:56,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:37:56,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561781100] [2022-11-03 01:37:56,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561781100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:37:56,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:37:56,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:37:56,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143999815] [2022-11-03 01:37:56,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:37:56,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:37:56,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:37:56,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:37:56,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:37:56,918 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:57,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:37:57,003 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-03 01:37:57,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:37:57,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 01:37:57,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:37:57,005 INFO L225 Difference]: With dead ends: 29 [2022-11-03 01:37:57,005 INFO L226 Difference]: Without dead ends: 18 [2022-11-03 01:37:57,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:37:57,012 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:37:57,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 15 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:37:57,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-03 01:37:57,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-11-03 01:37:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:57,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-03 01:37:57,020 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 11 [2022-11-03 01:37:57,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:37:57,021 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-03 01:37:57,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:57,021 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-03 01:37:57,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:37:57,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:37:57,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:37:57,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:37:57,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:37:57,234 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:37:57,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:37:57,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1012980313, now seen corresponding path program 1 times [2022-11-03 01:37:57,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:37:57,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324428025] [2022-11-03 01:37:57,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:57,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:37:57,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:37:57,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209260195] [2022-11-03 01:37:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:57,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:37:57,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:37:57,294 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:37:57,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:37:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:37:57,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 01:37:57,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:37:57,513 INFO L356 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-11-03 01:37:57,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 281 [2022-11-03 01:37:57,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-03 01:37:57,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-03 01:37:57,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-03 01:37:57,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:57,870 INFO L356 Elim1Store]: treesize reduction 36, result has 18.2 percent of original size [2022-11-03 01:37:57,871 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 4 case distinctions, treesize of input 218 treesize of output 187 [2022-11-03 01:37:57,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:37:57,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:37:58,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 01:37:58,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:58,567 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-03 01:37:58,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 153 treesize of output 159 [2022-11-03 01:37:58,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:37:58,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:37:58,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-03 01:37:58,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2022-11-03 01:37:58,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 01:37:58,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:58,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 01:37:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:37:58,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:37:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:37:59,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:37:59,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324428025] [2022-11-03 01:37:59,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:37:59,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209260195] [2022-11-03 01:37:59,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209260195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:37:59,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511390694] [2022-11-03 01:37:59,031 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:37:59,031 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:37:59,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:37:59,031 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:37:59,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:37:59,260 INFO L356 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-03 01:37:59,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-03 01:37:59,369 INFO L356 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-03 01:37:59,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-03 01:37:59,682 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-03 01:37:59,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-03 01:37:59,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:37:59,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:59,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-03 01:37:59,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:59,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:59,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:59,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:59,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:59,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:37:59,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:37:59,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:37:59,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:59,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:59,962 INFO L356 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-03 01:37:59,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-03 01:38:00,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-03 01:38:00,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:00,097 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:00,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-03 01:38:00,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:00,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:00,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:00,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:00,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:00,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:00,178 INFO L356 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-03 01:38:00,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 110 [2022-11-03 01:38:00,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:00,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:00,227 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:00,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:00,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:00,248 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:00,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-03 01:38:00,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:00,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:00,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:00,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:00,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:00,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:00,347 INFO L356 Elim1Store]: treesize reduction 119, result has 11.2 percent of original size [2022-11-03 01:38:00,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 115 [2022-11-03 01:38:00,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:00,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:00,424 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:00,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:00,479 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:38:00,931 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '552#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:38:00,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:38:00,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:38:00,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-03 01:38:00,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091561375] [2022-11-03 01:38:00,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:38:00,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 01:38:00,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:38:00,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 01:38:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:38:00,933 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:01,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:01,077 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-11-03 01:38:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:38:01,078 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 01:38:01,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:01,078 INFO L225 Difference]: With dead ends: 33 [2022-11-03 01:38:01,078 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 01:38:01,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-11-03 01:38:01,079 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:01,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 35 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 64 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-03 01:38:01,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 01:38:01,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2022-11-03 01:38:01,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:01,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-11-03 01:38:01,084 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 11 [2022-11-03 01:38:01,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:01,085 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-11-03 01:38:01,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:01,085 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-11-03 01:38:01,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 01:38:01,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:01,085 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:01,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:01,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:01,298 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:01,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:01,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1328410336, now seen corresponding path program 2 times [2022-11-03 01:38:01,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:38:01,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003277937] [2022-11-03 01:38:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:01,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:38:01,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:38:01,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009012129] [2022-11-03 01:38:01,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:38:01,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:01,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:38:01,336 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:38:01,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:38:01,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:38:01,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:38:01,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:38:01,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:38:01,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:38:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:38:01,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:38:01,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003277937] [2022-11-03 01:38:01,521 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:38:01,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009012129] [2022-11-03 01:38:01,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009012129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:38:01,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [16411739] [2022-11-03 01:38:01,524 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:38:01,524 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:38:01,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:38:01,525 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:38:01,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:38:01,611 INFO L356 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-03 01:38:01,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-03 01:38:01,826 INFO L356 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-03 01:38:01,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-03 01:38:02,057 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-03 01:38:02,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-03 01:38:02,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 62 [2022-11-03 01:38:02,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:02,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:02,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:02,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,297 INFO L356 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2022-11-03 01:38:02,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 484 treesize of output 487 [2022-11-03 01:38:02,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-03 01:38:02,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,521 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:02,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-03 01:38:02,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:02,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:02,597 INFO L356 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-03 01:38:02,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 110 [2022-11-03 01:38:02,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:02,649 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:02,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:02,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,668 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:02,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-03 01:38:02,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:02,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:02,737 INFO L356 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-03 01:38:02,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 110 [2022-11-03 01:38:02,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:02,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:02,787 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:02,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:02,802 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:38:03,084 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '719#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:38:03,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:38:03,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:38:03,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-03 01:38:03,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858331960] [2022-11-03 01:38:03,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:38:03,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:38:03,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:38:03,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:38:03,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:38:03,086 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:03,229 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2022-11-03 01:38:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:38:03,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 01:38:03,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:03,230 INFO L225 Difference]: With dead ends: 48 [2022-11-03 01:38:03,230 INFO L226 Difference]: Without dead ends: 40 [2022-11-03 01:38:03,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:38:03,231 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:03,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:38:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-03 01:38:03,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2022-11-03 01:38:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-11-03 01:38:03,237 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 12 [2022-11-03 01:38:03,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:03,237 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-11-03 01:38:03,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-11-03 01:38:03,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 01:38:03,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:03,238 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:03,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:03,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:38:03,454 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:03,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:03,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1695954287, now seen corresponding path program 3 times [2022-11-03 01:38:03,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:38:03,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875625999] [2022-11-03 01:38:03,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:03,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:38:03,489 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:38:03,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662316987] [2022-11-03 01:38:03,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:38:03,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:03,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:38:03,500 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:38:03,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:38:03,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:38:03,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:38:03,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:38:03,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:38:03,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:38:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:38:03,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:38:03,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875625999] [2022-11-03 01:38:03,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:38:03,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662316987] [2022-11-03 01:38:03,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662316987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:38:03,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1307906127] [2022-11-03 01:38:03,680 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:38:03,681 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:38:03,681 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:38:03,681 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:38:03,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:38:03,914 INFO L356 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-03 01:38:03,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-03 01:38:04,110 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-03 01:38:04,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-03 01:38:04,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-11-03 01:38:04,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:04,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:04,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-03 01:38:04,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:04,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:04,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:04,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:04,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:04,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:04,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:04,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:04,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:04,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:04,362 INFO L356 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-03 01:38:04,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-03 01:38:04,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-03 01:38:04,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:04,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:04,530 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:04,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-03 01:38:04,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:04,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:04,585 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:04,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:04,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:04,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:04,616 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:04,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:04,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:04,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:04,638 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:04,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:04,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:04,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:04,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:04,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:04,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:04,673 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:38:04,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-03 01:38:04,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:04,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:04,708 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:04,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:04,725 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:38:05,083 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '919#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:38:05,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:38:05,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:38:05,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-03 01:38:05,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781938630] [2022-11-03 01:38:05,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:38:05,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:38:05,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:38:05,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:38:05,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:38:05,085 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:05,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:05,224 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-11-03 01:38:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:38:05,224 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 01:38:05,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:05,225 INFO L225 Difference]: With dead ends: 44 [2022-11-03 01:38:05,225 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 01:38:05,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:38:05,226 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:05,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 28 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:38:05,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 01:38:05,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2022-11-03 01:38:05,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:05,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-03 01:38:05,232 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2022-11-03 01:38:05,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:05,232 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-03 01:38:05,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:05,232 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-03 01:38:05,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:38:05,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:05,233 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:05,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:05,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 01:38:05,450 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:05,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:05,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1261411007, now seen corresponding path program 1 times [2022-11-03 01:38:05,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:38:05,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241758520] [2022-11-03 01:38:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:05,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:38:05,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:38:05,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109978112] [2022-11-03 01:38:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:05,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:05,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:38:05,474 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:38:05,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:38:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:05,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 01:38:05,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:05,591 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:05,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-03 01:38:05,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:05,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:05,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:05,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-03 01:38:05,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-03 01:38:05,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-03 01:38:05,660 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:05,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-11-03 01:38:05,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:05,707 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:05,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-03 01:38:05,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:05,735 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:05,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-11-03 01:38:05,857 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:38:05,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 52 treesize of output 32 [2022-11-03 01:38:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:38:05,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:38:06,835 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_465 Int) (v_ArrVal_463 (Array Int Int))) (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_463))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_main_~b~0#1.base|))) (+ (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (select (select (store .cse1 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse0 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_465)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)))) 1)) is different from false [2022-11-03 01:38:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-03 01:38:06,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:38:06,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241758520] [2022-11-03 01:38:06,868 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:38:06,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109978112] [2022-11-03 01:38:06,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109978112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:38:06,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516514063] [2022-11-03 01:38:06,870 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:38:06,870 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:38:06,870 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:38:06,871 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:38:06,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:38:06,955 INFO L356 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-03 01:38:06,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-03 01:38:07,151 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-03 01:38:07,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-03 01:38:07,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-03 01:38:07,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:07,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:07,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-03 01:38:07,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:07,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:07,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:07,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:07,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:07,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:07,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:07,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:07,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:07,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:07,414 INFO L356 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-03 01:38:07,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-03 01:38:07,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-03 01:38:07,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:07,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:07,603 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:07,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-03 01:38:07,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:07,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:07,636 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:07,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:07,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:07,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:07,661 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:07,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:07,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:07,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:07,700 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:07,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:07,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:07,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:07,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:07,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:07,745 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:38:07,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-03 01:38:07,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:07,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:07,784 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:07,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:07,968 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:38:08,620 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1129#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2022-11-03 01:38:08,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:38:08,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:38:08,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2022-11-03 01:38:08,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538162705] [2022-11-03 01:38:08,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:38:08,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 01:38:08,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:38:08,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 01:38:08,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=393, Unknown=2, NotChecked=40, Total=506 [2022-11-03 01:38:08,622 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 01:38:08,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:08,825 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-11-03 01:38:08,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:38:08,825 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 14 [2022-11-03 01:38:08,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:08,826 INFO L225 Difference]: With dead ends: 27 [2022-11-03 01:38:08,826 INFO L226 Difference]: Without dead ends: 25 [2022-11-03 01:38:08,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=95, Invalid=507, Unknown=2, NotChecked=46, Total=650 [2022-11-03 01:38:08,827 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:08,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-11-03 01:38:08,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-03 01:38:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-03 01:38:08,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:08,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-03 01:38:08,833 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2022-11-03 01:38:08,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:08,833 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-03 01:38:08,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 01:38:08,833 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-03 01:38:08,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:38:08,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:08,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:08,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-03 01:38:09,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 01:38:09,050 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:09,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:09,050 INFO L85 PathProgramCache]: Analyzing trace with hash 970754635, now seen corresponding path program 4 times [2022-11-03 01:38:09,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:38:09,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892449786] [2022-11-03 01:38:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:09,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:38:09,071 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:38:09,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213390871] [2022-11-03 01:38:09,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:38:09,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:09,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:38:09,072 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:38:09,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:38:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:09,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 01:38:09,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:09,299 INFO L356 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-11-03 01:38:09,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 229 [2022-11-03 01:38:09,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-03 01:38:09,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-03 01:38:09,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-03 01:38:09,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:09,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:09,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:09,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 36 [2022-11-03 01:38:09,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:09,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:09,686 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-03 01:38:09,686 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 69 treesize of output 26 [2022-11-03 01:38:09,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:09,752 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-03 01:38:09,753 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 55 treesize of output 16 [2022-11-03 01:38:09,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:09,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 01:38:09,909 WARN L855 $PredicateComparison]: unable to prove that (and (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= |c_ULTIMATE.start_main_~c~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (let ((.cse2 (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) (.cse3 (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|))) (let ((.cse1 (and .cse2 (not .cse3))) (.cse0 (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|))) (or (and .cse0 (or .cse1 (and .cse2 .cse3 (or (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|))) (and (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_19 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int))) (let ((.cse4 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_18) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_19) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_20) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_18) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_19) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_20))) (let ((.cse6 (select .cse4 |c_ULTIMATE.start_main_~b~0#1.base|))) (and (= v_DerPreprocessor_18 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.base|)) (= .cse5 .cse6) (= v_DerPreprocessor_19 .cse6))))) (exists ((v_DerPreprocessor_27 (Array Int Int)) (v_DerPreprocessor_28 (Array Int Int)) (v_DerPreprocessor_29 (Array Int Int))) (let ((.cse7 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_27) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_28) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_29) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_27) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_28) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_29))) (let ((.cse8 (select .cse7 |c_ULTIMATE.start_main_~b~0#1.base|))) (and (= (select .cse7 |c_ULTIMATE.start_main_~a~0#1.base|) v_DerPreprocessor_27) (= .cse5 .cse8) (= v_DerPreprocessor_28 .cse8))))))) (and (exists ((v_prenex_50 (Array Int Int)) (v_prenex_49 (Array Int Int)) (v_prenex_48 (Array Int Int))) (let ((.cse9 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_50) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_49) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_48) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_50) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_49) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_48))) (and (= v_prenex_49 (select .cse9 |c_ULTIMATE.start_main_~b~0#1.base|)) (= (select v_prenex_48 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select .cse9 |c_ULTIMATE.start_main_~a~0#1.base|) v_prenex_50)))) (exists ((v_DerPreprocessor_27 (Array Int Int)) (v_DerPreprocessor_28 (Array Int Int)) (v_DerPreprocessor_29 (Array Int Int))) (let ((.cse10 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_27) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_28) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_29) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_27) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_28) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_29))) (and (= (select .cse10 |c_ULTIMATE.start_main_~a~0#1.base|) v_DerPreprocessor_27) (= (select v_DerPreprocessor_29 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= v_DerPreprocessor_28 (select .cse10 |c_ULTIMATE.start_main_~b~0#1.base|)))))))))) (and (or (let ((.cse11 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and .cse2 .cse3 (exists ((v_DerPreprocessor_26 (Array Int Int)) (v_DerPreprocessor_24 (Array Int Int)) (v_DerPreprocessor_25 (Array Int Int))) (let ((.cse12 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_24) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_25) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_26) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_24) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_25) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_26))) (and (= (select v_DerPreprocessor_26 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= .cse11 (select .cse12 |c_ULTIMATE.start_main_~a~0#1.base|)) (= v_DerPreprocessor_25 (select .cse12 |c_ULTIMATE.start_main_~b~0#1.base|))))) (exists ((v_DerPreprocessor_21 (Array Int Int)) (v_DerPreprocessor_22 (Array Int Int)) (v_DerPreprocessor_23 (Array Int Int))) (let ((.cse13 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_21) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_22) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_23) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_21) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_22) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_23))) (and (= .cse11 (select .cse13 |c_ULTIMATE.start_main_~a~0#1.base|)) (= v_DerPreprocessor_22 (select .cse13 |c_ULTIMATE.start_main_~b~0#1.base|)) (= (select v_DerPreprocessor_23 |c_ULTIMATE.start_main_~c~0#1.offset|) 0)))))) .cse1) (not .cse0))))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from true [2022-11-03 01:38:10,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:10,044 INFO L356 Elim1Store]: treesize reduction 23, result has 43.9 percent of original size [2022-11-03 01:38:10,044 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 295 treesize of output 290 [2022-11-03 01:38:10,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:10,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:10,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-11-03 01:38:10,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:10,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-11-03 01:38:10,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:10,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 01:38:10,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:10,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 01:38:10,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:10,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 01:38:10,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:10,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 01:38:10,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:10,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 01:38:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 01:38:10,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:38:19,048 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_169| Int) (v_ArrVal_551 Int) (|v_ULTIMATE.start_main_~i~0#1_171| Int) (v_ArrVal_549 Int) (v_ArrVal_548 Int) (v_ArrVal_546 Int)) (or (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_546) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_171|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_548)))) (store .cse0 |c_ULTIMATE.start_main_~b~0#1.base| (store (store (select .cse0 |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_549) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_169|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_551))) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_171|)) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_169|)))) is different from false [2022-11-03 01:38:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 01:38:19,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:38:19,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892449786] [2022-11-03 01:38:19,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:38:19,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213390871] [2022-11-03 01:38:19,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213390871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:38:19,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1986692731] [2022-11-03 01:38:19,068 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:38:19,068 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:38:19,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:38:19,069 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:38:19,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:38:19,271 INFO L356 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-03 01:38:19,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-03 01:38:19,368 INFO L356 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-03 01:38:19,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-03 01:38:19,596 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-03 01:38:19,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-03 01:38:19,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:19,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:19,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-03 01:38:19,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:19,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:19,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:19,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:19,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:19,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:19,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:19,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:19,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:19,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:19,808 INFO L356 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-03 01:38:19,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 492 treesize of output 484 [2022-11-03 01:38:19,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-03 01:38:19,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:19,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:19,924 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:19,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:19,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:19,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:19,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:19,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:19,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:19,975 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:38:19,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-03 01:38:20,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:20,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:20,023 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:20,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:20,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:20,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:20,072 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:20,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-03 01:38:20,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:20,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:20,110 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:20,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:20,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:20,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:20,145 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:20,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:20,160 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:38:20,505 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1324#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:38:20,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:38:20,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:38:20,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2022-11-03 01:38:20,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507750342] [2022-11-03 01:38:20,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:38:20,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 01:38:20,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:38:20,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 01:38:20,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=445, Unknown=11, NotChecked=90, Total=650 [2022-11-03 01:38:20,507 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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 01:38:20,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:20,913 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-11-03 01:38:20,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:38:20,914 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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 14 [2022-11-03 01:38:20,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:20,915 INFO L225 Difference]: With dead ends: 47 [2022-11-03 01:38:20,915 INFO L226 Difference]: Without dead ends: 45 [2022-11-03 01:38:20,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=148, Invalid=604, Unknown=12, NotChecked=106, Total=870 [2022-11-03 01:38:20,916 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:20,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 67 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 131 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2022-11-03 01:38:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-03 01:38:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2022-11-03 01:38:20,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:20,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-11-03 01:38:20,925 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 14 [2022-11-03 01:38:20,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:20,926 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-11-03 01:38:20,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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 01:38:20,926 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-11-03 01:38:20,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 01:38:20,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:20,927 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:20,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:21,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:21,144 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:21,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:21,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2106634379, now seen corresponding path program 5 times [2022-11-03 01:38:21,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:38:21,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922821137] [2022-11-03 01:38:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:21,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:38:21,186 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:38:21,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133184942] [2022-11-03 01:38:21,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:38:21,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:21,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:38:21,195 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:38:21,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:38:21,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:38:21,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:38:21,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:38:21,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:38:21,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:38:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:38:21,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:38:21,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922821137] [2022-11-03 01:38:21,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:38:21,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133184942] [2022-11-03 01:38:21,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133184942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:38:21,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1732337866] [2022-11-03 01:38:21,467 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:38:21,467 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:38:21,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:38:21,468 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:38:21,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:38:21,661 INFO L356 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-03 01:38:21,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-03 01:38:21,755 INFO L356 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-03 01:38:21,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-03 01:38:21,976 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-03 01:38:21,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-03 01:38:22,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:22,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-03 01:38:22,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:22,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:22,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:22,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,202 INFO L356 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-03 01:38:22,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-03 01:38:22,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-03 01:38:22,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,331 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:22,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-03 01:38:22,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:22,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:22,403 INFO L356 Elim1Store]: treesize reduction 119, result has 11.2 percent of original size [2022-11-03 01:38:22,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 115 [2022-11-03 01:38:22,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:22,455 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:22,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:22,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:22,473 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:22,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:22,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:22,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:22,525 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:38:22,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-03 01:38:22,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:22,555 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:22,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:22,569 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:38:22,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1561#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:38:22,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:38:22,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:38:22,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-03 01:38:22,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362839555] [2022-11-03 01:38:22,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:38:22,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 01:38:22,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:38:22,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 01:38:22,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:38:22,840 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:23,048 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2022-11-03 01:38:23,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:38:23,049 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 01:38:23,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:23,049 INFO L225 Difference]: With dead ends: 71 [2022-11-03 01:38:23,049 INFO L226 Difference]: Without dead ends: 61 [2022-11-03 01:38:23,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:38:23,050 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:23,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 37 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:38:23,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-03 01:38:23,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2022-11-03 01:38:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:23,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-11-03 01:38:23,058 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 15 [2022-11-03 01:38:23,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:23,059 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-11-03 01:38:23,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:23,059 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-11-03 01:38:23,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:38:23,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:23,060 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:23,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:23,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 01:38:23,260 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:23,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:23,261 INFO L85 PathProgramCache]: Analyzing trace with hash 2031564953, now seen corresponding path program 2 times [2022-11-03 01:38:23,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:38:23,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192385393] [2022-11-03 01:38:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:23,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:38:23,284 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:38:23,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973231050] [2022-11-03 01:38:23,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:38:23,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:23,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:38:23,300 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:38:23,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:38:23,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:38:23,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:38:23,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:38:23,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:38:23,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:38:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:38:23,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:38:23,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192385393] [2022-11-03 01:38:23,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:38:23,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973231050] [2022-11-03 01:38:23,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973231050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:38:23,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1127922956] [2022-11-03 01:38:23,538 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:38:23,538 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:38:23,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:38:23,539 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:38:23,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:38:23,628 INFO L356 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-03 01:38:23,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-03 01:38:23,819 INFO L356 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-03 01:38:23,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-03 01:38:24,024 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-03 01:38:24,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-03 01:38:24,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:24,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-03 01:38:24,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:24,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:24,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:24,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:24,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:24,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:24,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:24,205 INFO L356 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-03 01:38:24,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 492 treesize of output 484 [2022-11-03 01:38:24,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-03 01:38:24,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:24,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,318 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:24,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:24,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:24,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:24,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:24,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,356 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:38:24,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-03 01:38:24,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:24,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,391 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:24,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:24,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:24,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,435 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:24,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:24,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:24,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,473 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:24,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:24,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:24,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,502 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:24,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:24,676 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:38:25,188 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1857#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2022-11-03 01:38:25,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:38:25,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:38:25,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-03 01:38:25,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183006867] [2022-11-03 01:38:25,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:38:25,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:38:25,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:38:25,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:38:25,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:38:25,190 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 01:38:25,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:25,325 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2022-11-03 01:38:25,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:38:25,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 17 [2022-11-03 01:38:25,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:25,326 INFO L225 Difference]: With dead ends: 57 [2022-11-03 01:38:25,327 INFO L226 Difference]: Without dead ends: 41 [2022-11-03 01:38:25,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:38:25,328 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:25,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:38:25,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-03 01:38:25,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2022-11-03 01:38:25,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 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 01:38:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-11-03 01:38:25,334 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-11-03 01:38:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:25,335 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-11-03 01:38:25,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 01:38:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-11-03 01:38:25,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:38:25,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:25,336 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:25,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:25,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 01:38:25,553 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:25,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:25,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1741655437, now seen corresponding path program 3 times [2022-11-03 01:38:25,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:38:25,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192878661] [2022-11-03 01:38:25,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:25,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:38:25,572 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:38:25,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153057160] [2022-11-03 01:38:25,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:38:25,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:25,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:38:25,574 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:38:25,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 01:38:25,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:38:25,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:38:25,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 01:38:25,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:26,327 INFO L356 Elim1Store]: treesize reduction 252, result has 37.8 percent of original size [2022-11-03 01:38:26,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 226 treesize of output 790 [2022-11-03 01:38:26,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 15 [2022-11-03 01:38:26,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 15 [2022-11-03 01:38:26,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-03 01:38:26,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 15 [2022-11-03 01:38:26,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:28,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:28,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:28,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:28,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:28,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:28,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:28,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:28,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 241 [2022-11-03 01:38:28,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:28,174 INFO L356 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-03 01:38:28,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 14 case distinctions, treesize of input 675 treesize of output 731 [2022-11-03 01:38:30,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:30,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:30,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:30,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 487 treesize of output 440 [2022-11-03 01:38:30,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:30,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:30,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:30,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 330 treesize of output 289 [2022-11-03 01:38:30,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:30,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:30,295 INFO L356 Elim1Store]: treesize reduction 32, result has 20.0 percent of original size [2022-11-03 01:38:30,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 472 treesize of output 473 [2022-11-03 01:38:30,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:30,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:30,488 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 63 treesize of output 1 [2022-11-03 01:38:30,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1258 treesize of output 1248 [2022-11-03 01:38:30,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:30,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-11-03 01:38:31,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:31,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-11-03 01:38:31,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:31,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:31,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:31,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 162 [2022-11-03 01:38:31,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:31,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-11-03 01:38:31,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:31,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:31,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:31,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:31,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:31,521 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 0 case distinctions, treesize of input 62 treesize of output 25 [2022-11-03 01:38:31,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:31,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-11-03 01:38:31,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:31,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:31,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:31,884 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:31,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-03 01:38:31,911 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse10 (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse0 (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|))) (let ((.cse9 (not .cse0)) (.cse29 (not .cse10)) (.cse8 (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|))) (and (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|))) (let ((.cse1 (= (select .cse6 |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) (.cse7 (= (select .cse3 |c_ULTIMATE.start_main_~c~0#1.offset|) 1))) (or (and .cse0 (or (and .cse1 (exists ((v_DerPreprocessor_62 (Array Int Int)) (v_DerPreprocessor_63 (Array Int Int)) (v_DerPreprocessor_61 (Array Int Int)) (v_DerPreprocessor_37 (Array Int Int)) (v_DerPreprocessor_57 (Array Int Int)) (v_DerPreprocessor_36 (Array Int Int))) (let ((.cse5 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_57) |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_57) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_57) |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_57))) (let ((.cse4 (store (store (store (store (store (store (store (store (store (store (store (store .cse5 |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_61) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_62) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_63) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_61) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_62) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_63) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_61) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_62) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_63) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_61) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_62) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_63))) (let ((.cse2 (store (store (store (store (store (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_36) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_37) |c_ULTIMATE.start_main_~c~0#1.base| .cse6) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_36) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_37) |c_ULTIMATE.start_main_~c~0#1.base| .cse6))) (and (= (select v_DerPreprocessor_63 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select (select .cse2 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= .cse3 (select .cse4 |c_ULTIMATE.start_main_~b~0#1.base|)) (= v_DerPreprocessor_61 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select (select .cse5 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|) v_DerPreprocessor_36)))))) .cse7) (and .cse1 .cse8))) (and .cse9 (let ((.cse20 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (or (and .cse1 .cse10 (or (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_prenex_63 (Array Int Int)) (v_prenex_175 (Array Int Int)) (v_prenex_62 (Array Int Int)) (v_prenex_176 (Array Int Int)) (v_DerPreprocessor_59 (Array Int Int)) (v_prenex_177 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int)) (v_prenex_127 (Array Int Int)) (v_DerPreprocessor_58 (Array Int Int))) (let ((.cse16 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_58) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_59) |c_ULTIMATE.start_main_~c~0#1.base| .cse6) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_58) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_59) |c_ULTIMATE.start_main_~c~0#1.base| .cse6))) (let ((.cse15 (store (store (store (store (store (store .cse16 |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_62) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_63) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_127) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_62) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_63) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_127)) (.cse11 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_175) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_176) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_177) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_175) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_176) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_177))) (let ((.cse13 (store (store (store (store (store (store .cse11 |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_39) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_40) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_177) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_39) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_40) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_177)) (.cse12 (select .cse15 |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse14 (select .cse16 |c_ULTIMATE.start_main_~b~0#1.base|))) (and (= v_prenex_175 (select .cse11 |c_ULTIMATE.start_main_~a~0#1.base|)) (= .cse3 .cse12) (= (select .cse12 |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= (select v_prenex_127 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select .cse13 |c_ULTIMATE.start_main_~a~0#1.base|) v_DerPreprocessor_39) (= (select .cse14 |c_ULTIMATE.start_main_~c~0#1.offset|) 1) (= (select .cse13 |c_ULTIMATE.start_main_~b~0#1.base|) .cse12) (= (select .cse15 |c_ULTIMATE.start_main_~a~0#1.base|) v_prenex_62) (= v_DerPreprocessor_58 (select .cse16 |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select v_prenex_177 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select .cse11 |c_ULTIMATE.start_main_~b~0#1.base|) .cse14)))))) (exists ((v_DerPreprocessor_54 (Array Int Int)) (v_DerPreprocessor_59 (Array Int Int)) (v_prenex_122 (Array Int Int)) (v_prenex_123 (Array Int Int)) (v_prenex_124 (Array Int Int)) (v_DerPreprocessor_55 (Array Int Int)) (v_prenex_125 (Array Int Int)) (v_DerPreprocessor_56 (Array Int Int)) (v_prenex_126 (Array Int Int)) (v_DerPreprocessor_58 (Array Int Int))) (let ((.cse23 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_54) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_55) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_56) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_54) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_55) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_56)) (.cse21 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_58) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_59) |c_ULTIMATE.start_main_~c~0#1.base| .cse6) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_58) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_59) |c_ULTIMATE.start_main_~c~0#1.base| .cse6))) (let ((.cse19 (select (store (store (store (store (store (store .cse21 |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_123) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_122) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_126) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_123) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_122) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_126) |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse17 (select .cse23 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse18 (select .cse21 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse22 (select (store (store (store (store (store (store .cse23 |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_124) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_125) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_56) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_124) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_125) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_56) |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= .cse17 .cse18) (= .cse19 .cse18) (= .cse20 .cse18) (= v_prenex_123 .cse19) (= (select (select .cse21 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 1) (= v_DerPreprocessor_54 .cse17) (= (select v_DerPreprocessor_56 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= v_DerPreprocessor_58 .cse18) (= (select v_prenex_126 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= .cse22 .cse18) (= .cse22 v_prenex_124))))))) (and .cse1 .cse8 (or (exists ((v_prenex_167 (Array Int Int)) (v_prenex_168 (Array Int Int))) (let ((.cse25 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_167) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_168) |c_ULTIMATE.start_main_~c~0#1.base| .cse6) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_167) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_168) |c_ULTIMATE.start_main_~c~0#1.base| .cse6))) (let ((.cse24 (select .cse25 |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= (select .cse24 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= v_prenex_168 (select .cse25 |c_ULTIMATE.start_main_~b~0#1.base|)) (= .cse20 .cse24))))) (exists ((v_prenex_69 (Array Int Int)) (v_prenex_68 (Array Int Int))) (let ((.cse26 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_69) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_68) |c_ULTIMATE.start_main_~c~0#1.base| .cse6) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_69) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_68) |c_ULTIMATE.start_main_~c~0#1.base| .cse6))) (and (= (select .cse26 |c_ULTIMATE.start_main_~b~0#1.base|) v_prenex_68) (= .cse20 (select .cse26 |c_ULTIMATE.start_main_~a~0#1.base|))))))) (and (or (exists ((v_prenex_61 (Array Int Int)) (v_prenex_60 (Array Int Int)) (v_prenex_128 (Array Int Int))) (let ((.cse27 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_60) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_61) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_128) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_60) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_61) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_128))) (and (= .cse20 (select .cse27 |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select (select .cse27 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= (select v_prenex_128 |c_ULTIMATE.start_main_~c~0#1.offset|) 0)))) (and (exists ((v_prenex_180 (Array Int Int)) (v_prenex_178 (Array Int Int)) (v_prenex_179 (Array Int Int))) (let ((.cse28 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_179) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_178) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_180) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_179) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_178) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_180))) (and (= (select v_prenex_180 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select (select .cse28 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= .cse20 (select .cse28 |c_ULTIMATE.start_main_~a~0#1.base|))))) (= .cse20 .cse3))) .cse1 .cse7 .cse29))))))) .cse9 (= |c_ULTIMATE.start_main_~c~0#1.offset| 0) .cse29 (not .cse8)))) is different from true [2022-11-03 01:38:31,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:31,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:31,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:31,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 58 [2022-11-03 01:38:31,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:31,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:31,986 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:31,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-11-03 01:38:32,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:32,030 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:32,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-03 01:38:32,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:32,061 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:32,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 01:38:32,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:32,093 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-03 01:38:32,093 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 38 treesize of output 39 [2022-11-03 01:38:32,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:32,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:32,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:32,135 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-03 01:38:32,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 53 [2022-11-03 01:38:32,264 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:38:32,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 56 treesize of output 32 [2022-11-03 01:38:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 01:38:32,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:38:39,880 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_774 Int) (v_ArrVal_772 Int) (|v_ULTIMATE.start_main_~i~0#1_247| Int) (v_ArrVal_779 Int) (|v_ULTIMATE.start_main_~i~0#1_249| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_249|)) (= (let ((.cse1 (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|))) (select (store (let ((.cse2 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_772) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_249|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_774))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~c~0#1.base|))) (store .cse0 .cse1 (+ (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_247|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_779) .cse1)) 1) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_247|)))) is different from false [2022-11-03 01:38:40,681 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_774 Int) (v_ArrVal_772 Int) (|v_ULTIMATE.start_main_~i~0#1_247| Int) (v_ArrVal_779 Int) (|v_ULTIMATE.start_main_~i~0#1_249| Int)) (or (= (let ((.cse1 (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|))) (select (store (let ((.cse2 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_772) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_249|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_774))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~c~0#1.base|))) (store .cse0 .cse1 (+ (select .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|) (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_247|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_779) .cse1)) 1) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_249|)) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_247|)))) is different from false [2022-11-03 01:38:40,705 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_774 Int) (v_ArrVal_772 Int) (|v_ULTIMATE.start_main_~i~0#1_247| Int) (v_ArrVal_771 (Array Int Int)) (v_ArrVal_779 Int) (|v_ULTIMATE.start_main_~i~0#1_249| Int)) (or (= (let ((.cse1 (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|))) (select (store (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_771))) (let ((.cse2 (store (store (select .cse3 |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_772) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_249|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_774))) (let ((.cse0 (select (store .cse3 |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~c~0#1.base|))) (store .cse0 .cse1 (+ (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_247|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_779) .cse1)) 1) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_249|)) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_247|)))) is different from false [2022-11-03 01:38:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2022-11-03 01:38:40,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:38:40,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192878661] [2022-11-03 01:38:40,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:38:40,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153057160] [2022-11-03 01:38:40,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153057160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:38:40,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [774466613] [2022-11-03 01:38:40,746 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:38:40,746 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:38:40,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:38:40,746 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:38:40,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:38:40,951 INFO L356 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-03 01:38:40,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-03 01:38:41,061 INFO L356 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-03 01:38:41,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-03 01:38:41,289 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-03 01:38:41,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-03 01:38:41,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:41,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:41,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-03 01:38:41,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:41,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:41,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:41,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:41,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:41,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:41,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:41,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:41,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:41,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:41,457 INFO L356 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-03 01:38:41,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-03 01:38:41,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-03 01:38:41,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:41,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:41,597 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:41,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:41,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:41,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:41,635 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:41,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:41,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:41,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:41,660 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:41,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:41,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:41,679 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:41,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-03 01:38:41,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:41,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:41,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:41,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:41,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:41,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:41,749 INFO L356 Elim1Store]: treesize reduction 119, result has 11.2 percent of original size [2022-11-03 01:38:41,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 115 [2022-11-03 01:38:41,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:41,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:41,792 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:38:41,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:38:41,917 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:38:42,389 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2131#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:38:42,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:38:42,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:38:42,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2022-11-03 01:38:42,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013267273] [2022-11-03 01:38:42,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:38:42,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 01:38:42,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:38:42,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 01:38:42,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=473, Unknown=10, NotChecked=188, Total=756 [2022-11-03 01:38:42,391 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:42,420 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse14 (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse7 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse5 (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|)) (.cse10 (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|))) (let ((.cse0 (= (select .cse10 |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) (.cse13 (not .cse5)) (.cse11 (= (select .cse7 |c_ULTIMATE.start_main_~c~0#1.offset|) 1)) (.cse33 (not .cse14)) (.cse12 (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|))) (and .cse0 (forall ((v_ArrVal_774 Int) (v_ArrVal_772 Int) (|v_ULTIMATE.start_main_~i~0#1_247| Int) (v_ArrVal_771 (Array Int Int)) (v_ArrVal_779 Int) (|v_ULTIMATE.start_main_~i~0#1_249| Int)) (or (= (let ((.cse2 (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|))) (select (store (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_771))) (let ((.cse3 (store (store (select .cse4 |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_772) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_249|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_774))) (let ((.cse1 (select (store .cse4 |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~c~0#1.base|))) (store .cse1 .cse2 (+ (select .cse1 |c_ULTIMATE.start_main_~c~0#1.offset|) (select .cse3 |c_ULTIMATE.start_main_~b~0#1.offset|)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_247|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_779) .cse2)) 1) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_249|)) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_247|)))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (or (and .cse5 (or (and .cse0 (exists ((v_DerPreprocessor_62 (Array Int Int)) (v_DerPreprocessor_63 (Array Int Int)) (v_DerPreprocessor_61 (Array Int Int)) (v_DerPreprocessor_37 (Array Int Int)) (v_DerPreprocessor_57 (Array Int Int)) (v_DerPreprocessor_36 (Array Int Int))) (let ((.cse9 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_57) |c_ULTIMATE.start_main_~b~0#1.base| .cse7) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_57) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_57) |c_ULTIMATE.start_main_~b~0#1.base| .cse7) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_57))) (let ((.cse8 (store (store (store (store (store (store (store (store (store (store (store (store .cse9 |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_61) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_62) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_63) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_61) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_62) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_63) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_61) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_62) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_63) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_61) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_62) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_63))) (let ((.cse6 (store (store (store (store (store (store .cse8 |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_36) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_37) |c_ULTIMATE.start_main_~c~0#1.base| .cse10) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_36) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_37) |c_ULTIMATE.start_main_~c~0#1.base| .cse10))) (and (= (select v_DerPreprocessor_63 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select (select .cse6 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= .cse7 (select .cse8 |c_ULTIMATE.start_main_~b~0#1.base|)) (= v_DerPreprocessor_61 (select .cse8 |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select (select .cse9 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select .cse6 |c_ULTIMATE.start_main_~a~0#1.base|) v_DerPreprocessor_36)))))) .cse11) (and .cse0 .cse12))) (and .cse13 (let ((.cse24 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (or (and .cse0 .cse14 (or (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_prenex_63 (Array Int Int)) (v_prenex_175 (Array Int Int)) (v_prenex_62 (Array Int Int)) (v_prenex_176 (Array Int Int)) (v_DerPreprocessor_59 (Array Int Int)) (v_prenex_177 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int)) (v_prenex_127 (Array Int Int)) (v_DerPreprocessor_58 (Array Int Int))) (let ((.cse20 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_58) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_59) |c_ULTIMATE.start_main_~c~0#1.base| .cse10) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_58) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_59) |c_ULTIMATE.start_main_~c~0#1.base| .cse10))) (let ((.cse19 (store (store (store (store (store (store .cse20 |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_62) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_63) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_127) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_62) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_63) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_127)) (.cse15 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_175) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_176) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_177) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_175) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_176) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_177))) (let ((.cse17 (store (store (store (store (store (store .cse15 |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_39) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_40) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_177) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_39) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_40) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_177)) (.cse16 (select .cse19 |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse18 (select .cse20 |c_ULTIMATE.start_main_~b~0#1.base|))) (and (= v_prenex_175 (select .cse15 |c_ULTIMATE.start_main_~a~0#1.base|)) (= .cse7 .cse16) (= (select .cse16 |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= (select v_prenex_127 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select .cse17 |c_ULTIMATE.start_main_~a~0#1.base|) v_DerPreprocessor_39) (= (select .cse18 |c_ULTIMATE.start_main_~c~0#1.offset|) 1) (= (select .cse17 |c_ULTIMATE.start_main_~b~0#1.base|) .cse16) (= (select .cse19 |c_ULTIMATE.start_main_~a~0#1.base|) v_prenex_62) (= v_DerPreprocessor_58 (select .cse20 |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select v_prenex_177 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select .cse15 |c_ULTIMATE.start_main_~b~0#1.base|) .cse18)))))) (exists ((v_DerPreprocessor_54 (Array Int Int)) (v_DerPreprocessor_59 (Array Int Int)) (v_prenex_122 (Array Int Int)) (v_prenex_123 (Array Int Int)) (v_prenex_124 (Array Int Int)) (v_DerPreprocessor_55 (Array Int Int)) (v_prenex_125 (Array Int Int)) (v_DerPreprocessor_56 (Array Int Int)) (v_prenex_126 (Array Int Int)) (v_DerPreprocessor_58 (Array Int Int))) (let ((.cse27 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_54) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_55) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_56) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_54) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_55) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_56)) (.cse25 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_58) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_59) |c_ULTIMATE.start_main_~c~0#1.base| .cse10) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_58) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_59) |c_ULTIMATE.start_main_~c~0#1.base| .cse10))) (let ((.cse23 (select (store (store (store (store (store (store .cse25 |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_123) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_122) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_126) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_123) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_122) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_126) |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse21 (select .cse27 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse22 (select .cse25 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse26 (select (store (store (store (store (store (store .cse27 |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_124) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_125) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_56) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_124) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_125) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_56) |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= .cse21 .cse22) (= .cse23 .cse22) (= .cse24 .cse22) (= v_prenex_123 .cse23) (= (select (select .cse25 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 1) (= v_DerPreprocessor_54 .cse21) (= (select v_DerPreprocessor_56 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= v_DerPreprocessor_58 .cse22) (= (select v_prenex_126 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= .cse26 .cse22) (= .cse26 v_prenex_124))))))) (and .cse0 .cse12 (or (exists ((v_prenex_167 (Array Int Int)) (v_prenex_168 (Array Int Int))) (let ((.cse29 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_167) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_168) |c_ULTIMATE.start_main_~c~0#1.base| .cse10) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_167) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_168) |c_ULTIMATE.start_main_~c~0#1.base| .cse10))) (let ((.cse28 (select .cse29 |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= (select .cse28 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= v_prenex_168 (select .cse29 |c_ULTIMATE.start_main_~b~0#1.base|)) (= .cse24 .cse28))))) (exists ((v_prenex_69 (Array Int Int)) (v_prenex_68 (Array Int Int))) (let ((.cse30 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_69) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_68) |c_ULTIMATE.start_main_~c~0#1.base| .cse10) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_69) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_68) |c_ULTIMATE.start_main_~c~0#1.base| .cse10))) (and (= (select .cse30 |c_ULTIMATE.start_main_~b~0#1.base|) v_prenex_68) (= .cse24 (select .cse30 |c_ULTIMATE.start_main_~a~0#1.base|))))))) (and (or (exists ((v_prenex_61 (Array Int Int)) (v_prenex_60 (Array Int Int)) (v_prenex_128 (Array Int Int))) (let ((.cse31 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_60) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_61) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_128) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_60) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_61) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_128))) (and (= .cse24 (select .cse31 |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select (select .cse31 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= (select v_prenex_128 |c_ULTIMATE.start_main_~c~0#1.offset|) 0)))) (and (exists ((v_prenex_180 (Array Int Int)) (v_prenex_178 (Array Int Int)) (v_prenex_179 (Array Int Int))) (let ((.cse32 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_179) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_178) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_180) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_179) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_178) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_180))) (and (= (select v_prenex_180 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select (select .cse32 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= .cse24 (select .cse32 |c_ULTIMATE.start_main_~a~0#1.base|))))) (= .cse24 .cse7))) .cse0 .cse11 .cse33))))) .cse13 .cse11 (= |c_ULTIMATE.start_main_~c~0#1.offset| 0) .cse33 (not .cse12) (= |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from true [2022-11-03 01:38:44,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:44,366 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2022-11-03 01:38:44,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:38:44,366 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 01:38:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:44,367 INFO L225 Difference]: With dead ends: 49 [2022-11-03 01:38:44,367 INFO L226 Difference]: Without dead ends: 47 [2022-11-03 01:38:44,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=133, Invalid=686, Unknown=13, NotChecked=290, Total=1122 [2022-11-03 01:38:44,368 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:44,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 37 Invalid, 0 Unknown, 69 Unchecked, 0.0s Time] [2022-11-03 01:38:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-03 01:38:44,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2022-11-03 01:38:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 01:38:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2022-11-03 01:38:44,394 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 17 [2022-11-03 01:38:44,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:44,394 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2022-11-03 01:38:44,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:44,395 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2022-11-03 01:38:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:38:44,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:44,395 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:44,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:44,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 01:38:44,601 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:44,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:44,602 INFO L85 PathProgramCache]: Analyzing trace with hash 553715545, now seen corresponding path program 6 times [2022-11-03 01:38:44,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:38:44,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673125170] [2022-11-03 01:38:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:44,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:38:44,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:38:44,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8051255] [2022-11-03 01:38:44,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:38:44,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:44,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:38:44,624 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:38:44,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:38:44,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:38:44,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:38:44,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 01:38:44,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:44,945 INFO L356 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-11-03 01:38:44,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 229 [2022-11-03 01:38:44,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-03 01:38:44,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-03 01:38:44,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-03 01:38:45,063 INFO L356 Elim1Store]: treesize reduction 48, result has 26.2 percent of original size [2022-11-03 01:38:45,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 112 treesize of output 119 [2022-11-03 01:38:45,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:45,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:45,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:45,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:45,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:45,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:45,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 69 [2022-11-03 01:38:45,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:45,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:45,233 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-03 01:38:45,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 19 [2022-11-03 01:38:45,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:45,287 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-03 01:38:45,288 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 55 treesize of output 16 [2022-11-03 01:38:45,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:45,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 01:38:45,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:45,556 INFO L356 Elim1Store]: treesize reduction 25, result has 41.9 percent of original size [2022-11-03 01:38:45,556 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 140 treesize of output 145 [2022-11-03 01:38:45,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:45,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:38:45,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-11-03 01:38:45,640 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-03 01:38:45,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 30 [2022-11-03 01:38:47,816 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-03 01:38:47,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 50 [2022-11-03 01:38:47,898 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 01:38:47,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 43 [2022-11-03 01:38:48,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:48,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2022-11-03 01:38:48,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:48,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2022-11-03 01:38:48,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:48,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2022-11-03 01:38:48,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:48,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 01:38:48,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:48,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 01:38:48,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:48,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 01:38:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:38:48,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:38:54,656 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_885 Int) (v_ArrVal_884 Int) (v_ArrVal_882 Int) (|v_ULTIMATE.start_main_~i~0#1_282| Int) (|v_ULTIMATE.start_main_~i~0#1_281| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_282|)) (= (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_882) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_282|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_884) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_281|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_885) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_282| 1) |v_ULTIMATE.start_main_~i~0#1_281|)))) is different from false [2022-11-03 01:39:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 1 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-03 01:39:18,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:39:18,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673125170] [2022-11-03 01:39:18,993 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:39:18,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8051255] [2022-11-03 01:39:18,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8051255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:39:18,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1988530708] [2022-11-03 01:39:18,995 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:39:18,995 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:39:18,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:39:18,996 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:39:18,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:39:19,095 INFO L356 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-03 01:39:19,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-03 01:39:19,319 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-03 01:39:19,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-03 01:39:19,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-03 01:39:19,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:19,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-03 01:39:19,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:19,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:19,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:19,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,552 INFO L356 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-03 01:39:19,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 492 treesize of output 484 [2022-11-03 01:39:19,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-03 01:39:19,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,666 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:39:19,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-03 01:39:19,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:19,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:19,743 INFO L356 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-03 01:39:19,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 110 [2022-11-03 01:39:19,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:19,783 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:39:19,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:39:19,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:19,803 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:39:19,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:39:19,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:19,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:19,843 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:39:19,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-03 01:39:19,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:19,882 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:39:19,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:39:19,898 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:39:20,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2424#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:39:20,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:39:20,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:39:20,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2022-11-03 01:39:20,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797447957] [2022-11-03 01:39:20,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:39:20,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 01:39:20,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:39:20,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 01:39:20,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=785, Unknown=20, NotChecked=58, Total=992 [2022-11-03 01:39:20,301 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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 01:39:20,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:20,977 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2022-11-03 01:39:20,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:39:20,978 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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 17 [2022-11-03 01:39:20,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:20,978 INFO L225 Difference]: With dead ends: 80 [2022-11-03 01:39:20,978 INFO L226 Difference]: Without dead ends: 78 [2022-11-03 01:39:20,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=204, Invalid=1112, Unknown=20, NotChecked=70, Total=1406 [2022-11-03 01:39:20,980 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:20,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 155 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 164 Invalid, 0 Unknown, 209 Unchecked, 0.2s Time] [2022-11-03 01:39:20,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-03 01:39:20,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2022-11-03 01:39:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:20,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-11-03 01:39:20,998 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 17 [2022-11-03 01:39:20,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:20,999 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-11-03 01:39:21,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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 01:39:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-11-03 01:39:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 01:39:21,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:21,001 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:39:21,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:21,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:39:21,217 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:21,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:21,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1865467409, now seen corresponding path program 7 times [2022-11-03 01:39:21,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:39:21,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251338715] [2022-11-03 01:39:21,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:21,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:39:21,254 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:39:21,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866466695] [2022-11-03 01:39:21,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:39:21,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:39:21,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:39:21,256 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:39:21,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 01:39:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:21,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:39:21,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:39:21,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:39:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:39:21,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:39:21,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251338715] [2022-11-03 01:39:21,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:39:21,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866466695] [2022-11-03 01:39:21,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866466695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:39:21,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1634129199] [2022-11-03 01:39:21,550 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:39:21,550 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:39:21,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:39:21,551 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:39:21,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:39:21,648 INFO L356 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-03 01:39:21,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-03 01:39:21,843 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-03 01:39:21,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-03 01:39:21,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-03 01:39:21,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:21,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:21,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-03 01:39:22,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:22,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:22,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:22,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:22,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:22,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:22,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:22,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:22,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:22,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:22,068 INFO L356 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-03 01:39:22,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 492 treesize of output 484 [2022-11-03 01:39:22,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-03 01:39:22,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:22,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:22,192 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:39:22,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:39:22,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:22,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:22,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:22,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:22,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:22,237 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:39:22,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-03 01:39:22,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:22,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:22,273 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:39:22,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:39:22,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:22,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:22,320 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:39:22,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-03 01:39:22,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:22,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:22,351 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:39:22,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:39:22,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:22,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:22,384 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:39:22,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:39:22,399 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:39:22,805 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2764#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:39:22,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:39:22,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:39:22,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-03 01:39:22,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046607018] [2022-11-03 01:39:22,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:39:22,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 01:39:22,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:39:22,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 01:39:22,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:39:22,807 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:23,163 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2022-11-03 01:39:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:39:23,164 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 01:39:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:23,164 INFO L225 Difference]: With dead ends: 91 [2022-11-03 01:39:23,164 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 01:39:23,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:39:23,166 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:23,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:39:23,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 01:39:23,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 47. [2022-11-03 01:39:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 46 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:23,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2022-11-03 01:39:23,197 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 18 [2022-11-03 01:39:23,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:23,198 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2022-11-03 01:39:23,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2022-11-03 01:39:23,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 01:39:23,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:23,201 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:39:23,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:23,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:39:23,421 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:23,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:23,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1399368403, now seen corresponding path program 4 times [2022-11-03 01:39:23,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:39:23,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253509223] [2022-11-03 01:39:23,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:23,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:39:23,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:39:23,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527943256] [2022-11-03 01:39:23,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:39:23,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:39:23,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:39:23,442 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:39:23,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 01:39:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:23,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:39:23,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:39:23,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:39:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:39:23,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:39:23,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253509223] [2022-11-03 01:39:23,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:39:23,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527943256] [2022-11-03 01:39:23,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527943256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:39:23,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [305955929] [2022-11-03 01:39:23,702 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:39:23,702 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:39:23,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:39:23,702 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:39:23,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:39:23,959 INFO L356 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-03 01:39:23,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-03 01:39:24,205 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-03 01:39:24,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-03 01:39:24,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-11-03 01:39:24,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:24,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 62 [2022-11-03 01:39:24,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:24,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:24,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:24,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:24,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:24,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:24,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:24,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:24,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:24,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:24,434 INFO L356 Elim1Store]: treesize reduction 144, result has 6.5 percent of original size [2022-11-03 01:39:24,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 490 treesize of output 484 [2022-11-03 01:39:24,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-03 01:39:24,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:24,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:24,555 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:39:24,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:39:24,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:24,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:24,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:24,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:24,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:24,594 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:39:24,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-03 01:39:24,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:24,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:24,632 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:39:24,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:39:24,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:24,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:24,676 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:39:24,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:39:24,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:24,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:24,712 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:39:24,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:39:24,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:24,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:24,742 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:39:24,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-03 01:39:24,868 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:39:25,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3130#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2022-11-03 01:39:25,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:39:25,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:39:25,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-03 01:39:25,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763182770] [2022-11-03 01:39:25,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:39:25,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 01:39:25,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:39:25,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 01:39:25,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:39:25,424 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:25,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:25,649 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2022-11-03 01:39:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:39:25,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 01:39:25,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:25,650 INFO L225 Difference]: With dead ends: 95 [2022-11-03 01:39:25,651 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 01:39:25,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:39:25,655 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:25,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 35 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:39:25,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 01:39:25,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 47. [2022-11-03 01:39:25,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-11-03 01:39:25,676 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 19 [2022-11-03 01:39:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:25,676 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-11-03 01:39:25,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:39:25,677 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-11-03 01:39:25,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 01:39:25,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:25,677 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:39:25,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-03 01:39:25,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 01:39:25,885 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:25,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:25,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1837651189, now seen corresponding path program 5 times [2022-11-03 01:39:25,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:39:25,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450023362] [2022-11-03 01:39:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:25,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:39:25,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:39:25,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844804158] [2022-11-03 01:39:25,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:39:25,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:39:25,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:39:25,903 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:39:25,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 01:39:26,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:39:26,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-11-03 01:39:26,130 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:39:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:39:26,207 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:39:26,217 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:39:26,219 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:39:26,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:26,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 01:39:26,436 INFO L444 BasicCegarLoop]: Path program histogram: [7, 5, 1, 1, 1, 1] [2022-11-03 01:39:26,440 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:39:26,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:39:26 BoogieIcfgContainer [2022-11-03 01:39:26,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:39:26,475 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:39:26,476 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:39:26,476 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:39:26,476 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:37:51" (3/4) ... [2022-11-03 01:39:26,478 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-03 01:39:26,528 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc86a3dd-7d1e-4a16-85cc-2a5900d74553/bin/utaipan-7li7fVZpFI/witness.graphml [2022-11-03 01:39:26,528 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:39:26,529 INFO L158 Benchmark]: Toolchain (without parser) took 95670.48ms. Allocated memory was 113.2MB in the beginning and 226.5MB in the end (delta: 113.2MB). Free memory was 78.5MB in the beginning and 190.8MB in the end (delta: -112.2MB). Peak memory consumption was 252.3kB. Max. memory is 16.1GB. [2022-11-03 01:39:26,529 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 113.2MB. Free memory is still 95.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:39:26,529 INFO L158 Benchmark]: CACSL2BoogieTranslator took 323.36ms. Allocated memory is still 113.2MB. Free memory was 78.4MB in the beginning and 89.9MB in the end (delta: -11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 01:39:26,530 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.10ms. Allocated memory is still 113.2MB. Free memory was 89.9MB in the beginning and 88.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:39:26,530 INFO L158 Benchmark]: Boogie Preprocessor took 47.17ms. Allocated memory is still 113.2MB. Free memory was 88.1MB in the beginning and 86.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:39:26,530 INFO L158 Benchmark]: RCFGBuilder took 400.89ms. Allocated memory is still 113.2MB. Free memory was 86.6MB in the beginning and 71.6MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 01:39:26,530 INFO L158 Benchmark]: TraceAbstraction took 94782.27ms. Allocated memory was 113.2MB in the beginning and 226.5MB in the end (delta: 113.2MB). Free memory was 70.8MB in the beginning and 192.9MB in the end (delta: -122.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:39:26,530 INFO L158 Benchmark]: Witness Printer took 53.06ms. Allocated memory is still 226.5MB. Free memory was 192.9MB in the beginning and 190.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:39:26,531 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 113.2MB. Free memory is still 95.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 323.36ms. Allocated memory is still 113.2MB. Free memory was 78.4MB in the beginning and 89.9MB in the end (delta: -11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.10ms. Allocated memory is still 113.2MB. Free memory was 89.9MB in the beginning and 88.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.17ms. Allocated memory is still 113.2MB. Free memory was 88.1MB in the beginning and 86.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 400.89ms. Allocated memory is still 113.2MB. Free memory was 86.6MB in the beginning and 71.6MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 94782.27ms. Allocated memory was 113.2MB in the beginning and 226.5MB in the end (delta: 113.2MB). Free memory was 70.8MB in the beginning and 192.9MB in the end (delta: -122.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 53.06ms. Allocated memory is still 226.5MB. Free memory was 192.9MB in the beginning and 190.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] a[0] = 6 [L33] b[0] = 1 [L34] c[0] = 0 [L36] i=1 VAL [a={-1:0}, b={4:0}, c={5:0}, i=1, N=3] [L36] COND TRUE i