./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9 --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 2725e330d17b26eb9ce2dcee483f6c78572e140dfdc07b8b5f8c08e6f3c60756 --- 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-6b4ec56 [2022-11-20 18:54:02,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 18:54:02,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 18:54:02,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 18:54:02,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 18:54:02,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 18:54:02,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 18:54:02,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 18:54:02,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 18:54:02,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 18:54:02,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 18:54:02,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 18:54:02,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 18:54:02,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 18:54:02,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 18:54:02,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 18:54:02,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 18:54:02,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 18:54:02,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 18:54:02,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 18:54:02,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 18:54:02,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 18:54:02,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 18:54:02,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 18:54:02,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 18:54:02,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 18:54:02,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 18:54:02,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 18:54:02,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 18:54:02,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 18:54:02,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 18:54:02,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 18:54:02,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 18:54:02,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 18:54:02,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 18:54:02,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 18:54:02,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 18:54:02,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 18:54:02,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 18:54:02,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 18:54:02,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 18:54:02,587 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 18:54:02,622 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 18:54:02,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 18:54:02,629 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 18:54:02,629 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 18:54:02,630 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 18:54:02,630 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 18:54:02,630 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 18:54:02,631 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 18:54:02,631 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 18:54:02,631 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 18:54:02,632 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 18:54:02,632 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 18:54:02,632 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 18:54:02,633 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 18:54:02,633 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 18:54:02,633 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 18:54:02,633 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 18:54:02,634 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 18:54:02,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 18:54:02,634 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 18:54:02,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 18:54:02,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 18:54:02,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 18:54:02,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 18:54:02,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 18:54:02,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 18:54:02,636 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 18:54:02,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 18:54:02,637 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 18:54:02,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 18:54:02,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 18:54:02,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 18:54:02,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 18:54:02,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 18:54:02,638 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 18:54:02,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 18:54:02,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 18:54:02,638 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 18:54:02,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 18:54:02,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 18:54:02,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 18:54:02,639 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_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2725e330d17b26eb9ce2dcee483f6c78572e140dfdc07b8b5f8c08e6f3c60756 [2022-11-20 18:54:02,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 18:54:02,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 18:54:02,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 18:54:02,945 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 18:54:02,946 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 18:54:02,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2022-11-20 18:54:05,889 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 18:54:06,219 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 18:54:06,220 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2022-11-20 18:54:06,262 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/data/001f23b96/0ee8c13fff07422ba81dec2335518594/FLAGdd66e441b [2022-11-20 18:54:06,294 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/data/001f23b96/0ee8c13fff07422ba81dec2335518594 [2022-11-20 18:54:06,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 18:54:06,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 18:54:06,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 18:54:06,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 18:54:06,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 18:54:06,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:54:06" (1/1) ... [2022-11-20 18:54:06,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672f2813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:06, skipping insertion in model container [2022-11-20 18:54:06,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:54:06" (1/1) ... [2022-11-20 18:54:06,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 18:54:06,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 18:54:06,705 WARN L237 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_62a26cbc-6e90-4900-aa15-5a14efd037e4/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-2.i[24020,24033] [2022-11-20 18:54:06,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 18:54:06,721 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 18:54:06,793 WARN L237 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_62a26cbc-6e90-4900-aa15-5a14efd037e4/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-2.i[24020,24033] [2022-11-20 18:54:06,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 18:54:06,822 INFO L208 MainTranslator]: Completed translation [2022-11-20 18:54:06,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:06 WrapperNode [2022-11-20 18:54:06,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 18:54:06,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 18:54:06,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 18:54:06,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 18:54:06,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:06" (1/1) ... [2022-11-20 18:54:06,856 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:06" (1/1) ... [2022-11-20 18:54:06,883 INFO L138 Inliner]: procedures = 126, calls = 56, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 173 [2022-11-20 18:54:06,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 18:54:06,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 18:54:06,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 18:54:06,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 18:54:06,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:06" (1/1) ... [2022-11-20 18:54:06,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:06" (1/1) ... [2022-11-20 18:54:06,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:06" (1/1) ... [2022-11-20 18:54:06,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:06" (1/1) ... [2022-11-20 18:54:06,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:06" (1/1) ... [2022-11-20 18:54:06,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:06" (1/1) ... [2022-11-20 18:54:06,921 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:06" (1/1) ... [2022-11-20 18:54:06,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:06" (1/1) ... [2022-11-20 18:54:06,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 18:54:06,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 18:54:06,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 18:54:06,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 18:54:06,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:06" (1/1) ... [2022-11-20 18:54:06,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 18:54:06,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:54:06,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 18:54:06,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 18:54:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-11-20 18:54:07,006 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-11-20 18:54:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 18:54:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 18:54:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 18:54:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 18:54:07,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 18:54:07,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 18:54:07,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 18:54:07,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 18:54:07,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 18:54:07,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 18:54:07,115 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 18:54:07,117 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 18:54:07,174 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-11-20 18:54:07,640 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 18:54:07,748 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 18:54:07,749 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 18:54:07,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:54:07 BoogieIcfgContainer [2022-11-20 18:54:07,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 18:54:07,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 18:54:07,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 18:54:07,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 18:54:07,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:54:06" (1/3) ... [2022-11-20 18:54:07,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c68071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:54:07, skipping insertion in model container [2022-11-20 18:54:07,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:06" (2/3) ... [2022-11-20 18:54:07,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c68071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:54:07, skipping insertion in model container [2022-11-20 18:54:07,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:54:07" (3/3) ... [2022-11-20 18:54:07,771 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-2.i [2022-11-20 18:54:07,794 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 18:54:07,794 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 18:54:07,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 18:54:07,906 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;@1c10f790, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 18:54:07,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 18:54:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:54:07,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 18:54:07,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:54:07,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:54:07,930 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:54:07,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:54:07,935 INFO L85 PathProgramCache]: Analyzing trace with hash -711197800, now seen corresponding path program 1 times [2022-11-20 18:54:07,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:54:07,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761314730] [2022-11-20 18:54:07,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:54:07,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:54:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:54:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:54:08,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:54:08,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761314730] [2022-11-20 18:54:08,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761314730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:54:08,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:54:08,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 18:54:08,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771467159] [2022-11-20 18:54:08,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:54:08,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 18:54:08,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:54:08,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 18:54:08,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 18:54:08,120 INFO L87 Difference]: Start difference. First operand has 30 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:54:08,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:54:08,189 INFO L93 Difference]: Finished difference Result 49 states and 71 transitions. [2022-11-20 18:54:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 18:54:08,192 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 18:54:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:54:08,199 INFO L225 Difference]: With dead ends: 49 [2022-11-20 18:54:08,199 INFO L226 Difference]: Without dead ends: 13 [2022-11-20 18:54:08,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 18:54:08,205 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:54:08,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 18:54:08,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-20 18:54:08,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-20 18:54:08,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:54:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-20 18:54:08,236 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2022-11-20 18:54:08,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:54:08,236 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-20 18:54:08,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:54:08,237 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-20 18:54:08,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 18:54:08,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:54:08,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:54:08,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 18:54:08,238 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:54:08,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:54:08,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1014932892, now seen corresponding path program 1 times [2022-11-20 18:54:08,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:54:08,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135066307] [2022-11-20 18:54:08,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:54:08,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:54:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:54:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:54:08,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:54:08,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135066307] [2022-11-20 18:54:08,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135066307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:54:08,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:54:08,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 18:54:08,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879824913] [2022-11-20 18:54:08,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:54:08,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 18:54:08,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:54:08,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 18:54:08,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 18:54:08,541 INFO L87 Difference]: Start difference. First operand 13 states and 14 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) [2022-11-20 18:54:08,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:54:08,646 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-11-20 18:54:08,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 18:54:08,647 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 [2022-11-20 18:54:08,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:54:08,647 INFO L225 Difference]: With dead ends: 28 [2022-11-20 18:54:08,647 INFO L226 Difference]: Without dead ends: 26 [2022-11-20 18:54:08,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 18:54:08,649 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:54:08,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 31 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 18:54:08,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-20 18:54:08,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2022-11-20 18:54:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:54:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-11-20 18:54:08,654 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 9 [2022-11-20 18:54:08,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:54:08,655 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-11-20 18:54:08,655 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) [2022-11-20 18:54:08,655 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-11-20 18:54:08,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 18:54:08,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:54:08,656 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:54:08,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 18:54:08,656 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:54:08,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:54:08,657 INFO L85 PathProgramCache]: Analyzing trace with hash 708790604, now seen corresponding path program 1 times [2022-11-20 18:54:08,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:54:08,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893261422] [2022-11-20 18:54:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:54:08,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:54:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:54:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:54:08,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:54:08,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893261422] [2022-11-20 18:54:08,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893261422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:54:08,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703509977] [2022-11-20 18:54:08,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:54:08,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:54:08,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:54:08,960 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:54:08,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 18:54:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:54:09,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 18:54:09,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:54:09,258 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-20 18:54:09,270 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-20 18:54:09,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 18:54:09,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 18:54:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:54:09,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:54:09,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-11-20 18:54:09,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:09,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:54:09,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703509977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:54:09,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1756029870] [2022-11-20 18:54:09,494 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-20 18:54:09,495 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:54:09,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:54:09,503 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:54:09,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:54:09,581 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-20 18:54:09,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-20 18:54:09,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-20 18:54:09,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:09,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-20 18:54:09,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:09,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:09,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2022-11-20 18:54:09,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:09,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-20 18:54:09,984 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:54:11,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1756029870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:54:11,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:54:11,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5, 5] total 14 [2022-11-20 18:54:11,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515421238] [2022-11-20 18:54:11,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:54:11,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 18:54:11,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:54:11,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 18:54:11,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-11-20 18:54:11,207 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 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) [2022-11-20 18:54:11,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:54:11,308 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-11-20 18:54:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 18:54:11,309 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 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 12 [2022-11-20 18:54:11,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:54:11,310 INFO L225 Difference]: With dead ends: 28 [2022-11-20 18:54:11,310 INFO L226 Difference]: Without dead ends: 20 [2022-11-20 18:54:11,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-11-20 18:54:11,312 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:54:11,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 18:54:11,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-20 18:54:11,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2022-11-20 18:54:11,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:54:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-20 18:54:11,317 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2022-11-20 18:54:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:54:11,317 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-20 18:54:11,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 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) [2022-11-20 18:54:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-20 18:54:11,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 18:54:11,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:54:11,318 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:54:11,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 18:54:11,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:54:11,524 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:54:11,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:54:11,525 INFO L85 PathProgramCache]: Analyzing trace with hash -345981109, now seen corresponding path program 1 times [2022-11-20 18:54:11,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:54:11,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444289680] [2022-11-20 18:54:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:54:11,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:54:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:54:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:54:11,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:54:11,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444289680] [2022-11-20 18:54:11,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444289680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:54:11,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44049330] [2022-11-20 18:54:11,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:54:11,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:54:11,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:54:11,820 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:54:11,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 18:54:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:54:11,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 18:54:11,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:54:11,930 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-20 18:54:12,002 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 18:54:12,002 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 11 [2022-11-20 18:54:12,009 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-20 18:54:12,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:12,070 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 18:54:12,118 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-20 18:54:12,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 18:54:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:54:12,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:54:12,162 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_118 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_118) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2022-11-20 18:54:12,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:54:12,242 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2022-11-20 18:54:12,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:54:12,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-11-20 18:54:12,302 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2022-11-20 18:54:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-20 18:54:12,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44049330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:54:12,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1492433375] [2022-11-20 18:54:12,414 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-20 18:54:12,414 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:54:12,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:54:12,415 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:54:12,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:54:12,460 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-20 18:54:12,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-20 18:54:12,496 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-20 18:54:12,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-20 18:54:12,579 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 18:54:12,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-20 18:54:12,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-20 18:54:12,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:12,610 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 18:54:12,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 18:54:12,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 18:54:12,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:54:12,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:54:12,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:12,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 18:54:12,763 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-20 18:54:12,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 42 [2022-11-20 18:54:12,823 INFO L321 Elim1Store]: treesize reduction 66, result has 34.7 percent of original size [2022-11-20 18:54:12,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 52 [2022-11-20 18:54:12,907 INFO L321 Elim1Store]: treesize reduction 90, result has 35.3 percent of original size [2022-11-20 18:54:12,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 43 treesize of output 77 [2022-11-20 18:54:12,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:12,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:12,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-20 18:54:12,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:12,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2022-11-20 18:54:13,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:54:13,126 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 18:54:13,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 362 treesize of output 317 [2022-11-20 18:54:13,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:13,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:13,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:13,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:54:13,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:54:13,162 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-20 18:54:13,162 INFO L350 Elim1Store]: Elim1 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 5 case distinctions, treesize of input 314 treesize of output 295 [2022-11-20 18:54:13,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:54:13,201 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 18:54:13,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 308 treesize of output 311 [2022-11-20 18:54:13,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:54:13,544 INFO L321 Elim1Store]: treesize reduction 70, result has 19.5 percent of original size [2022-11-20 18:54:13,545 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 440 treesize of output 346 [2022-11-20 18:54:13,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:54:13,604 INFO L321 Elim1Store]: treesize reduction 94, result has 19.7 percent of original size [2022-11-20 18:54:13,604 INFO L350 Elim1Store]: Elim1 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 440 treesize of output 409 [2022-11-20 18:54:13,730 INFO L321 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2022-11-20 18:54:13,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 431 treesize of output 437 [2022-11-20 18:54:13,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:13,888 INFO L321 Elim1Store]: treesize reduction 234, result has 17.6 percent of original size [2022-11-20 18:54:13,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 436 treesize of output 459 [2022-11-20 18:54:13,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:54:13,989 INFO L321 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2022-11-20 18:54:13,990 INFO L350 Elim1Store]: Elim1 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 9 case distinctions, treesize of input 436 treesize of output 442 [2022-11-20 18:54:14,243 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 18:54:14,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:54:14,256 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-11-20 18:54:14,280 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-20 18:54:14,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 18:54:14,312 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 18:54:14,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 26 [2022-11-20 18:54:14,347 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 18:54:14,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2022-11-20 18:54:14,357 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 9 [2022-11-20 18:54:14,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:54:14,382 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 18:54:14,389 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-11-20 18:54:14,577 INFO L321 Elim1Store]: treesize reduction 128, result has 12.9 percent of original size [2022-11-20 18:54:14,578 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 163 treesize of output 158 [2022-11-20 18:54:14,630 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 18:54:14,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 144 [2022-11-20 18:54:14,677 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 18:54:14,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 132 [2022-11-20 18:54:14,714 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-20 18:54:14,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 40 [2022-11-20 18:54:14,754 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-20 18:54:14,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 40 [2022-11-20 18:54:15,320 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:54:16,824 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '401#(and (not (= |ULTIMATE.start_main_~t~0#1.base| 0)) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_main_~p~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~t~0#1.base|) |ULTIMATE.start_main_~t~0#1.offset|) 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~t~0#1.base|) (+ |ULTIMATE.start_main_~t~0#1.offset| 4)) 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 1)) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~t~0#1.offset| 0) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~t~0#1.base|) (+ |ULTIMATE.start_main_~t~0#1.offset| 4)) 0) (<= 0 |#StackHeapBarrier|) (not (= 0 |ULTIMATE.start_main_~p~0#1.base|)) (= |#NULL.base| 0))' at error location [2022-11-20 18:54:16,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 18:54:16,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:54:16,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-20 18:54:16,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808318417] [2022-11-20 18:54:16,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 18:54:16,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 18:54:16,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:54:16,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 18:54:16,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=477, Unknown=3, NotChecked=44, Total=600 [2022-11-20 18:54:16,826 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:54:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:54:16,990 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-11-20 18:54:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 18:54:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 18:54:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:54:16,992 INFO L225 Difference]: With dead ends: 27 [2022-11-20 18:54:16,992 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 18:54:16,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=101, Invalid=602, Unknown=3, NotChecked=50, Total=756 [2022-11-20 18:54:16,993 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:54:16,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 63 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-20 18:54:16,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 18:54:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-11-20 18:54:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:54:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-11-20 18:54:16,998 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2022-11-20 18:54:16,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:54:16,998 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-11-20 18:54:16,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:54:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-11-20 18:54:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 18:54:16,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:54:16,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:54:17,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 18:54:17,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:54:17,205 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:54:17,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:54:17,205 INFO L85 PathProgramCache]: Analyzing trace with hash 803104517, now seen corresponding path program 1 times [2022-11-20 18:54:17,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:54:17,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161714836] [2022-11-20 18:54:17,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:54:17,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:54:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:54:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:54:17,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:54:17,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161714836] [2022-11-20 18:54:17,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161714836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:54:17,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769592418] [2022-11-20 18:54:17,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:54:17,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:54:17,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:54:17,658 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:54:17,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 18:54:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:54:17,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-20 18:54:17,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:54:17,789 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-20 18:54:17,827 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 18:54:17,828 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 11 [2022-11-20 18:54:17,858 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-20 18:54:17,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 18:54:17,918 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 18:54:17,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 48 [2022-11-20 18:54:17,922 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2022-11-20 18:54:17,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2022-11-20 18:54:17,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 18:54:17,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-20 18:54:18,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 18:54:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:54:18,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:54:18,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 177 [2022-11-20 18:54:18,098 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (and (forall ((v_ArrVal_179 (Array Int Int))) (= |c_ULTIMATE.start_main_~p~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_179) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (forall ((v_ArrVal_184 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_184) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) |c_ULTIMATE.start_main_~p~0#1.offset|)))) is different from false [2022-11-20 18:54:18,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:54:18,124 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-20 18:54:18,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:54:18,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-11-20 18:54:18,138 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2022-11-20 18:54:18,153 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 18:54:18,154 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-11-20 18:54:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-20 18:54:18,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769592418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:54:18,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1792433611] [2022-11-20 18:54:18,267 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 18:54:18,267 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:54:18,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:54:18,268 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:54:18,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:54:18,313 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-20 18:54:18,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-20 18:54:18,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-20 18:54:18,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 18:54:18,399 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-20 18:54:18,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-11-20 18:54:18,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:18,413 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 18:54:18,476 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 18:54:18,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-20 18:54:18,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 18:54:18,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:54:18,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:18,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 18:54:18,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:54:18,585 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-20 18:54:18,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 42 [2022-11-20 18:54:18,675 INFO L321 Elim1Store]: treesize reduction 90, result has 35.3 percent of original size [2022-11-20 18:54:18,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 43 treesize of output 77 [2022-11-20 18:54:18,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 18:54:18,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:18,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:18,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-20 18:54:18,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:18,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2022-11-20 18:54:18,857 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-20 18:54:18,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 368 treesize of output 323 [2022-11-20 18:54:18,895 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-20 18:54:18,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 314 treesize of output 311 [2022-11-20 18:54:18,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:54:18,959 INFO L321 Elim1Store]: treesize reduction 146, result has 13.1 percent of original size [2022-11-20 18:54:18,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 308 treesize of output 289 [2022-11-20 18:54:19,333 INFO L321 Elim1Store]: treesize reduction 104, result has 19.4 percent of original size [2022-11-20 18:54:19,334 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 478 treesize of output 376 [2022-11-20 18:54:19,376 INFO L321 Elim1Store]: treesize reduction 100, result has 18.7 percent of original size [2022-11-20 18:54:19,377 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 478 treesize of output 418 [2022-11-20 18:54:19,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:54:19,453 INFO L321 Elim1Store]: treesize reduction 202, result has 20.2 percent of original size [2022-11-20 18:54:19,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 474 treesize of output 480 [2022-11-20 18:54:19,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:19,610 INFO L321 Elim1Store]: treesize reduction 226, result has 20.4 percent of original size [2022-11-20 18:54:19,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 458 treesize of output 489 [2022-11-20 18:54:19,652 INFO L321 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2022-11-20 18:54:19,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 453 treesize of output 459 [2022-11-20 18:54:20,037 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 18:54:20,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:54:20,050 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-11-20 18:54:20,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 18:54:20,071 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-20 18:54:20,097 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 18:54:20,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2022-11-20 18:54:20,125 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 18:54:20,126 INFO L350 Elim1Store]: Elim1 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 26 [2022-11-20 18:54:20,140 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 9 [2022-11-20 18:54:20,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:54:20,160 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 18:54:20,166 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-11-20 18:54:20,292 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 18:54:20,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 148 [2022-11-20 18:54:20,340 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 18:54:20,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 136 [2022-11-20 18:54:20,395 INFO L321 Elim1Store]: treesize reduction 128, result has 12.9 percent of original size [2022-11-20 18:54:20,396 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 139 treesize of output 134 [2022-11-20 18:54:20,440 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-20 18:54:20,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 40 [2022-11-20 18:54:20,474 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-20 18:54:20,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 40 [2022-11-20 18:54:21,144 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:54:21,945 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '581#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 18:54:21,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 18:54:21,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:54:21,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-11-20 18:54:21,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28229536] [2022-11-20 18:54:21,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 18:54:21,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 18:54:21,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:54:21,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 18:54:21,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=363, Unknown=1, NotChecked=38, Total=462 [2022-11-20 18:54:21,948 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:54:22,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:54:22,151 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-11-20 18:54:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 18:54:22,152 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 18:54:22,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:54:22,153 INFO L225 Difference]: With dead ends: 30 [2022-11-20 18:54:22,153 INFO L226 Difference]: Without dead ends: 28 [2022-11-20 18:54:22,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=80, Invalid=475, Unknown=1, NotChecked=44, Total=600 [2022-11-20 18:54:22,154 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:54:22,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 73 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 18:54:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-20 18:54:22,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-11-20 18:54:22,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:54:22,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-11-20 18:54:22,161 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2022-11-20 18:54:22,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:54:22,161 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-11-20 18:54:22,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:54:22,162 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-11-20 18:54:22,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 18:54:22,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:54:22,163 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:54:22,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 18:54:22,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:54:22,364 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:54:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:54:22,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1717217102, now seen corresponding path program 2 times [2022-11-20 18:54:22,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:54:22,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609915486] [2022-11-20 18:54:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:54:22,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:54:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:54:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:54:22,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:54:22,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609915486] [2022-11-20 18:54:22,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609915486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:54:22,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231699457] [2022-11-20 18:54:22,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 18:54:22,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:54:22,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:54:22,909 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:54:22,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 18:54:23,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 18:54:23,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 18:54:23,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 18:54:23,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:54:23,076 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-20 18:54:23,116 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 18:54:23,117 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 11 [2022-11-20 18:54:23,123 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-20 18:54:23,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:23,182 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 18:54:23,227 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-20 18:54:23,273 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-20 18:54:23,323 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 18:54:23,323 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 25 [2022-11-20 18:54:23,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 18:54:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:54:23,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:54:23,438 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_53| Int) (v_ArrVal_280 Int) (v_ArrVal_278 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_278))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_53| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_53|) |c_ULTIMATE.start_main_~t~0#1.offset| 1) (+ |c_ULTIMATE.start_main_~t~0#1.offset| 4) v_ArrVal_280))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2022-11-20 18:54:23,451 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_53| Int) (v_ArrVal_280 Int) (v_ArrVal_278 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_278))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_53| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_53|) 0 1) 4 v_ArrVal_280))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2022-11-20 18:54:23,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:54:23,556 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 43 [2022-11-20 18:54:23,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:54:23,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 150 treesize of output 164 [2022-11-20 18:54:23,591 INFO L350 Elim1Store]: Elim1 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 292 treesize of output 280 [2022-11-20 18:54:23,645 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 4 [2022-11-20 18:54:23,681 INFO L350 Elim1Store]: Elim1 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 218 treesize of output 210 [2022-11-20 18:54:23,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:54:23,792 INFO L350 Elim1Store]: Elim1 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 234 treesize of output 232 [2022-11-20 18:54:24,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:54:24,033 INFO L350 Elim1Store]: Elim1 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 388 treesize of output 380 [2022-11-20 18:54:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-11-20 18:54:24,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231699457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:54:24,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [466567076] [2022-11-20 18:54:24,466 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-20 18:54:24,466 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:54:24,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:54:24,466 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:54:24,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:54:24,508 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-20 18:54:24,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-20 18:54:24,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-20 18:54:24,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:24,548 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 18:54:24,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 18:54:24,615 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 18:54:24,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-20 18:54:24,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-20 18:54:24,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 18:54:24,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:24,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 18:54:24,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:54:24,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:54:24,744 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-20 18:54:24,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 16 [2022-11-20 18:54:24,773 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-20 18:54:24,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 42 [2022-11-20 18:54:24,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:54:24,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 42 [2022-11-20 18:54:24,858 INFO L321 Elim1Store]: treesize reduction 66, result has 34.7 percent of original size [2022-11-20 18:54:24,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 52 [2022-11-20 18:54:24,953 INFO L321 Elim1Store]: treesize reduction 90, result has 35.3 percent of original size [2022-11-20 18:54:24,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 43 treesize of output 77 [2022-11-20 18:54:25,020 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 18:54:25,028 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 18:54:25,034 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-11-20 18:54:25,085 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 9 [2022-11-20 18:54:25,090 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-20 18:54:25,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 18:54:25,141 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-20 18:54:25,142 INFO L350 Elim1Store]: Elim1 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 113 treesize of output 104 [2022-11-20 18:54:25,190 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-20 18:54:25,190 INFO L350 Elim1Store]: Elim1 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 101 treesize of output 92 [2022-11-20 18:54:25,282 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 18:54:25,290 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 18:54:25,297 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-11-20 18:54:25,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-20 18:54:25,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-20 18:54:25,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-20 18:54:25,445 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:54:26,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '778#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~p~0#1.base_59| Int) (|v_ULTIMATE.start_main_~p~0#1.offset_57| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_59|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_57| 4)) 0) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~p~0#1.base_59|) |v_ULTIMATE.start_main_~p~0#1.offset_57|) 1) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_59|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_57| 4)) 0))) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_main_~p~0#1.offset|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 1)) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (<= 0 |#StackHeapBarrier|) (not (= 0 |ULTIMATE.start_main_~p~0#1.base|)) (= |#NULL.base| 0))' at error location [2022-11-20 18:54:26,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 18:54:26,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:54:26,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-20 18:54:26,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300610047] [2022-11-20 18:54:26,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 18:54:26,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 18:54:26,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:54:26,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 18:54:26,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=596, Unknown=10, NotChecked=102, Total=812 [2022-11-20 18:54:26,072 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:54:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:54:26,326 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-11-20 18:54:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 18:54:26,327 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 18:54:26,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:54:26,328 INFO L225 Difference]: With dead ends: 42 [2022-11-20 18:54:26,328 INFO L226 Difference]: Without dead ends: 40 [2022-11-20 18:54:26,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=120, Invalid=690, Unknown=10, NotChecked=110, Total=930 [2022-11-20 18:54:26,329 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:54:26,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 116 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 115 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2022-11-20 18:54:26,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-20 18:54:26,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2022-11-20 18:54:26,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:54:26,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-20 18:54:26,335 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 17 [2022-11-20 18:54:26,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:54:26,336 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-20 18:54:26,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:54:26,336 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-20 18:54:26,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 18:54:26,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:54:26,337 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:54:26,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 18:54:26,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:54:26,540 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:54:26,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:54:26,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1971327733, now seen corresponding path program 2 times [2022-11-20 18:54:26,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:54:26,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565111075] [2022-11-20 18:54:26,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:54:26,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:54:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:54:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:54:27,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:54:27,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565111075] [2022-11-20 18:54:27,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565111075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:54:27,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544272679] [2022-11-20 18:54:27,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 18:54:27,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:54:27,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:54:27,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:54:27,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 18:54:27,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 18:54:27,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 18:54:27,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 18:54:27,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:54:27,232 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-20 18:54:27,269 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 18:54:27,269 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 11 [2022-11-20 18:54:27,295 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-20 18:54:27,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 18:54:27,351 INFO L321 Elim1Store]: treesize reduction 18, result has 21.7 percent of original size [2022-11-20 18:54:27,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-11-20 18:54:27,356 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 18:54:27,361 INFO L350 Elim1Store]: Elim1 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 23 [2022-11-20 18:54:27,367 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 18:54:27,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:54:27,495 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-11-20 18:54:27,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2022-11-20 18:54:27,505 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 18:54:27,505 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-11-20 18:54:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:54:27,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:54:27,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:54:27,585 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 45 treesize of output 49 [2022-11-20 18:54:27,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:54:27,592 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-20 18:54:27,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:54:27,605 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 45 treesize of output 44 [2022-11-20 18:54:27,611 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:54:27,611 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 35 treesize of output 39 [2022-11-20 18:54:27,623 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (and (forall ((v_arrayElimArr_8 (Array Int Int)) (v_arrayElimArr_7 (Array Int Int))) (or (not (= (select v_arrayElimArr_8 .cse0) 0)) (not (= (select v_arrayElimArr_7 .cse0) 0)) (= (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_arrayElimArr_7))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_arrayElimArr_8) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2) 4)) 0))) (forall ((v_arrayElimArr_6 (Array Int Int)) (v_arrayElimArr_5 (Array Int Int))) (or (= (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_arrayElimArr_6))) (select (select .cse3 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_arrayElimArr_5) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2)) (+ (select (select .cse3 |c_ULTIMATE.start_main_~a~0#1.base|) .cse2) 4))) 0) (not (= (select v_arrayElimArr_6 .cse0) 0)) (not (= (select v_arrayElimArr_5 .cse0) 0)))))) is different from false [2022-11-20 18:54:27,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:54:27,689 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 61 [2022-11-20 18:54:27,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:54:27,696 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2022-11-20 18:54:27,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:54:27,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 71 [2022-11-20 18:54:27,955 INFO L321 Elim1Store]: treesize reduction 42, result has 82.1 percent of original size [2022-11-20 18:54:27,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 208 treesize of output 335 [2022-11-20 18:54:27,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:54:27,987 INFO L350 Elim1Store]: Elim1 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 181 treesize of output 145 [2022-11-20 18:54:28,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:54:28,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 228 [2022-11-20 18:55:04,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:04,894 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 61 [2022-11-20 18:55:04,907 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:04,908 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2022-11-20 18:55:04,964 INFO L321 Elim1Store]: treesize reduction 88, result has 21.4 percent of original size [2022-11-20 18:55:04,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 107 [2022-11-20 18:55:04,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:04,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 43 treesize of output 37 [2022-11-20 18:55:04,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:04,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:04,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 59 [2022-11-20 18:55:04,996 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 4 [2022-11-20 18:55:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-20 18:55:05,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544272679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:55:05,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2096045513] [2022-11-20 18:55:05,291 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 18:55:05,291 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:55:05,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:55:05,292 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:55:05,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:55:05,339 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-20 18:55:05,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-20 18:55:05,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-20 18:55:05,417 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 18:55:05,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-20 18:55:05,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 18:55:05,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 18:55:05,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:05,442 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 18:55:05,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-20 18:55:05,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:55:05,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:05,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 18:55:05,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:55:05,582 INFO L321 Elim1Store]: treesize reduction 56, result has 40.4 percent of original size [2022-11-20 18:55:05,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 54 [2022-11-20 18:55:05,609 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-20 18:55:05,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 42 [2022-11-20 18:55:05,664 INFO L321 Elim1Store]: treesize reduction 48, result has 37.7 percent of original size [2022-11-20 18:55:05,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 46 [2022-11-20 18:55:05,748 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 18:55:05,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 65 [2022-11-20 18:55:05,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2022-11-20 18:55:05,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:05,882 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 18:55:05,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 314 treesize of output 317 [2022-11-20 18:55:05,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:05,920 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 18:55:05,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 308 treesize of output 311 [2022-11-20 18:55:05,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:05,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:05,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:05,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:05,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:05,949 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-20 18:55:05,950 INFO L350 Elim1Store]: Elim1 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 5 case distinctions, treesize of input 308 treesize of output 289 [2022-11-20 18:55:06,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:06,207 INFO L321 Elim1Store]: treesize reduction 70, result has 19.5 percent of original size [2022-11-20 18:55:06,207 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 440 treesize of output 346 [2022-11-20 18:55:06,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:06,350 INFO L321 Elim1Store]: treesize reduction 226, result has 20.4 percent of original size [2022-11-20 18:55:06,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 436 treesize of output 467 [2022-11-20 18:55:06,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:06,412 INFO L321 Elim1Store]: treesize reduction 94, result has 19.7 percent of original size [2022-11-20 18:55:06,413 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 440 treesize of output 409 [2022-11-20 18:55:06,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:06,482 INFO L321 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2022-11-20 18:55:06,482 INFO L350 Elim1Store]: Elim1 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 9 case distinctions, treesize of input 436 treesize of output 442 [2022-11-20 18:55:06,518 INFO L321 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2022-11-20 18:55:06,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 421 treesize of output 427 [2022-11-20 18:55:06,683 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 18:55:06,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:55:06,701 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-11-20 18:55:06,742 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 18:55:06,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2022-11-20 18:55:06,767 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 18:55:06,768 INFO L350 Elim1Store]: Elim1 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 26 [2022-11-20 18:55:06,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 18:55:06,780 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 9 [2022-11-20 18:55:06,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 18:55:06,796 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 18:55:06,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:55:06,827 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-11-20 18:55:06,938 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 18:55:06,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 148 [2022-11-20 18:55:06,986 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 18:55:06,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 136 [2022-11-20 18:55:07,052 INFO L321 Elim1Store]: treesize reduction 128, result has 12.9 percent of original size [2022-11-20 18:55:07,052 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 139 treesize of output 134 [2022-11-20 18:55:07,090 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-20 18:55:07,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 40 [2022-11-20 18:55:07,124 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-20 18:55:07,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 40 [2022-11-20 18:55:07,374 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:55:08,058 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1005#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 18:55:08,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 18:55:08,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:55:08,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-11-20 18:55:08,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906981098] [2022-11-20 18:55:08,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 18:55:08,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 18:55:08,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:55:08,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 18:55:08,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=401, Unknown=1, NotChecked=40, Total=506 [2022-11-20 18:55:08,061 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:55:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:55:10,397 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-11-20 18:55:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 18:55:10,397 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 18:55:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:55:10,398 INFO L225 Difference]: With dead ends: 44 [2022-11-20 18:55:10,398 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 18:55:10,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=95, Invalid=558, Unknown=1, NotChecked=48, Total=702 [2022-11-20 18:55:10,399 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 40 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:55:10,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 93 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 89 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-11-20 18:55:10,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 18:55:10,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-11-20 18:55:10,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 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) [2022-11-20 18:55:10,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-11-20 18:55:10,404 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2022-11-20 18:55:10,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:55:10,405 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-11-20 18:55:10,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:55:10,405 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-11-20 18:55:10,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 18:55:10,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:55:10,406 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:55:10,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 18:55:10,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:55:10,612 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:55:10,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:55:10,613 INFO L85 PathProgramCache]: Analyzing trace with hash -254410690, now seen corresponding path program 3 times [2022-11-20 18:55:10,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:55:10,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499112674] [2022-11-20 18:55:10,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:55:10,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:55:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:55:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:55:11,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:55:11,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499112674] [2022-11-20 18:55:11,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499112674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:55:11,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639821541] [2022-11-20 18:55:11,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 18:55:11,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:55:11,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:55:11,505 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:55:11,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 18:55:11,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 18:55:11,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 18:55:11,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-20 18:55:11,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:55:11,687 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-20 18:55:11,744 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 18:55:11,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 18:55:11,803 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-20 18:55:11,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 18:55:11,893 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-20 18:55:11,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 18:55:11,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 18:55:11,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 18:55:11,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 18:55:11,991 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 18:55:11,991 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 57 [2022-11-20 18:55:11,998 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2022-11-20 18:55:12,006 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 26 [2022-11-20 18:55:12,146 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-20 18:55:12,147 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 65 [2022-11-20 18:55:12,155 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 24 [2022-11-20 18:55:12,163 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-11-20 18:55:12,257 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 18:55:12,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 26 [2022-11-20 18:55:12,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-11-20 18:55:12,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 18:55:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:55:12,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:55:12,367 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_447 (Array Int Int)) (v_ArrVal_449 (Array Int Int)) (v_ArrVal_445 (Array Int Int))) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_449) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_447) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_445) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) 1)) is different from false [2022-11-20 18:55:13,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:13,037 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 52 treesize of output 56 [2022-11-20 18:55:13,050 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:13,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 65 [2022-11-20 18:55:13,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:13,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 121 [2022-11-20 18:55:13,074 INFO L350 Elim1Store]: Elim1 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 45 treesize of output 27 [2022-11-20 18:55:13,117 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 22 [2022-11-20 18:55:13,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:13,287 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-20 18:55:13,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:13,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 157 [2022-11-20 18:55:13,311 INFO L350 Elim1Store]: Elim1 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 142 treesize of output 126 [2022-11-20 18:55:13,332 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:13,333 INFO L350 Elim1Store]: Elim1 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 136 treesize of output 108 [2022-11-20 18:55:13,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:13,431 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-11-20 18:55:13,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:13,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:13,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-11-20 18:55:13,471 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2022-11-20 18:55:13,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:13,482 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-11-20 18:55:13,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:13,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:13,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2022-11-20 18:55:13,519 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:13,520 INFO L350 Elim1Store]: Elim1 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 41 treesize of output 33 [2022-11-20 18:55:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-20 18:55:14,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639821541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:55:14,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [913676854] [2022-11-20 18:55:14,058 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 18:55:14,058 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:55:14,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:55:14,059 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:55:14,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:55:14,123 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-20 18:55:14,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-20 18:55:14,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-20 18:55:14,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 18:55:14,264 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 18:55:14,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-20 18:55:14,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:14,281 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 18:55:14,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-20 18:55:14,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 18:55:14,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:55:14,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:14,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 18:55:14,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:55:14,399 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-20 18:55:14,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 16 [2022-11-20 18:55:14,434 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-20 18:55:14,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 42 [2022-11-20 18:55:14,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:14,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 42 [2022-11-20 18:55:14,533 INFO L321 Elim1Store]: treesize reduction 66, result has 34.7 percent of original size [2022-11-20 18:55:14,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 52 [2022-11-20 18:55:14,639 INFO L321 Elim1Store]: treesize reduction 90, result has 35.3 percent of original size [2022-11-20 18:55:14,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 43 treesize of output 77 [2022-11-20 18:55:14,707 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-11-20 18:55:14,720 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 18:55:14,729 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 18:55:14,838 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-20 18:55:14,839 INFO L350 Elim1Store]: Elim1 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 113 treesize of output 104 [2022-11-20 18:55:14,908 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-20 18:55:14,909 INFO L350 Elim1Store]: Elim1 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 101 treesize of output 92 [2022-11-20 18:55:15,008 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 9 [2022-11-20 18:55:15,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 18:55:15,021 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-20 18:55:15,044 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 18:55:15,053 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 18:55:15,066 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-11-20 18:55:15,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-20 18:55:15,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-20 18:55:15,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-20 18:55:15,262 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:55:15,879 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1244#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 18:55:15,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 18:55:15,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:55:15,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-11-20 18:55:15,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208208781] [2022-11-20 18:55:15,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 18:55:15,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 18:55:15,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:55:15,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 18:55:15,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=520, Unknown=5, NotChecked=46, Total=650 [2022-11-20 18:55:15,888 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:55:16,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:55:16,219 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-11-20 18:55:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 18:55:16,224 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 18:55:16,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:55:16,227 INFO L225 Difference]: With dead ends: 32 [2022-11-20 18:55:16,227 INFO L226 Difference]: Without dead ends: 30 [2022-11-20 18:55:16,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=110, Invalid=701, Unknown=5, NotChecked=54, Total=870 [2022-11-20 18:55:16,229 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:55:16,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 92 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 103 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-11-20 18:55:16,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-20 18:55:16,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-11-20 18:55:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 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) [2022-11-20 18:55:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-11-20 18:55:16,235 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 20 [2022-11-20 18:55:16,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:55:16,236 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-11-20 18:55:16,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:55:16,236 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-11-20 18:55:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 18:55:16,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:55:16,237 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:55:16,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 18:55:16,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:55:16,438 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:55:16,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:55:16,438 INFO L85 PathProgramCache]: Analyzing trace with hash -140450151, now seen corresponding path program 3 times [2022-11-20 18:55:16,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:55:16,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216769214] [2022-11-20 18:55:16,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:55:16,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:55:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:55:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:55:17,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:55:17,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216769214] [2022-11-20 18:55:17,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216769214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:55:17,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228088251] [2022-11-20 18:55:17,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 18:55:17,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:55:17,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:55:17,085 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:55:17,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 18:55:17,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 18:55:17,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 18:55:17,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-20 18:55:17,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:55:17,489 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-20 18:55:17,541 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 18:55:17,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 18:55:17,554 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-20 18:55:17,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:17,616 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 18:55:17,671 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-20 18:55:17,703 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-20 18:55:17,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 33 [2022-11-20 18:55:17,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 18:55:17,888 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-20 18:55:17,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-11-20 18:55:17,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 18:55:17,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 18:55:18,022 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 27 [2022-11-20 18:55:18,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2022-11-20 18:55:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:55:18,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:55:18,162 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_94| Int) (v_ArrVal_577 (Array Int Int)) (v_ArrVal_579 Int)) (or (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_577))) (store .cse0 |c_ULTIMATE.start_main_~t~0#1.base| (store (store (select .cse0 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_94| 1) (+ |v_ULTIMATE.start_main_~p~0#1.offset_94| 4) v_ArrVal_579))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (< |v_ULTIMATE.start_main_~p~0#1.offset_94| |c_ULTIMATE.start_main_~t~0#1.offset|))) is different from false [2022-11-20 18:55:18,271 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~t~0#1.base_35| Int) (|v_ULTIMATE.start_main_~p~0#1.offset_94| Int) (v_ArrVal_572 (Array Int Int)) (v_ArrVal_577 (Array Int Int)) (v_ArrVal_579 Int)) (or (< |v_ULTIMATE.start_main_~p~0#1.offset_94| 0) (= (select (select (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_572) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_577))) (store .cse0 |v_ULTIMATE.start_main_~t~0#1.base_35| (store (store (select .cse0 |v_ULTIMATE.start_main_~t~0#1.base_35|) |v_ULTIMATE.start_main_~p~0#1.offset_94| 1) (+ |v_ULTIMATE.start_main_~p~0#1.offset_94| 4) v_ArrVal_579))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_35|) 0)))) is different from false [2022-11-20 18:55:18,318 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~t~0#1.base_35| Int) (|v_ULTIMATE.start_main_~p~0#1.offset_94| Int) (v_ArrVal_572 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_36| Int) (v_ArrVal_577 (Array Int Int)) (v_ArrVal_579 Int)) (or (< |v_ULTIMATE.start_main_~p~0#1.offset_94| 0) (= (select (select (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_572) |v_ULTIMATE.start_main_~t~0#1.base_36| v_ArrVal_577))) (store .cse0 |v_ULTIMATE.start_main_~t~0#1.base_35| (store (store (select .cse0 |v_ULTIMATE.start_main_~t~0#1.base_35|) |v_ULTIMATE.start_main_~p~0#1.offset_94| 1) (+ |v_ULTIMATE.start_main_~p~0#1.offset_94| 4) v_ArrVal_579))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (not (= (select (store |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_36| 1) |v_ULTIMATE.start_main_~t~0#1.base_35|) 0)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_36|) 0)))) is different from false [2022-11-20 18:55:18,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:18,489 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 51 [2022-11-20 18:55:18,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:18,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:18,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:18,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1294 treesize of output 1236 [2022-11-20 18:55:18,552 INFO L350 Elim1Store]: Elim1 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 1206 treesize of output 1174 [2022-11-20 18:55:18,579 INFO L350 Elim1Store]: Elim1 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 555 treesize of output 539 [2022-11-20 18:55:18,635 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 4 [2022-11-20 18:55:21,645 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 18:55:21,712 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:21,712 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 29 [2022-11-20 18:55:21,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:21,763 INFO L350 Elim1Store]: Elim1 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 174 treesize of output 172 [2022-11-20 18:55:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2022-11-20 18:55:22,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228088251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:55:22,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2143910514] [2022-11-20 18:55:22,503 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-20 18:55:22,503 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:55:22,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:55:22,504 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:55:22,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:55:22,548 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-20 18:55:22,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-20 18:55:22,595 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-20 18:55:22,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-20 18:55:22,682 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 18:55:22,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-20 18:55:22,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:22,695 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 18:55:22,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 18:55:22,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 18:55:22,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-20 18:55:22,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:55:22,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:22,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 18:55:22,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:55:22,804 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-20 18:55:22,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 16 [2022-11-20 18:55:22,832 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-20 18:55:22,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 42 [2022-11-20 18:55:22,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:22,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 42 [2022-11-20 18:55:22,942 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 18:55:22,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 65 [2022-11-20 18:55:22,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-20 18:55:23,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:23,076 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 18:55:23,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 314 treesize of output 317 [2022-11-20 18:55:23,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:23,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:23,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:23,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:23,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:23,106 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-20 18:55:23,107 INFO L350 Elim1Store]: Elim1 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 5 case distinctions, treesize of input 314 treesize of output 295 [2022-11-20 18:55:23,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:23,142 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 18:55:23,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 308 treesize of output 311 [2022-11-20 18:55:23,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:23,361 INFO L321 Elim1Store]: treesize reduction 70, result has 19.5 percent of original size [2022-11-20 18:55:23,361 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 440 treesize of output 346 [2022-11-20 18:55:23,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:23,416 INFO L321 Elim1Store]: treesize reduction 94, result has 19.7 percent of original size [2022-11-20 18:55:23,417 INFO L350 Elim1Store]: Elim1 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 440 treesize of output 409 [2022-11-20 18:55:23,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:23,564 INFO L321 Elim1Store]: treesize reduction 226, result has 20.4 percent of original size [2022-11-20 18:55:23,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 436 treesize of output 467 [2022-11-20 18:55:23,600 INFO L321 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2022-11-20 18:55:23,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 431 treesize of output 437 [2022-11-20 18:55:23,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:23,679 INFO L321 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2022-11-20 18:55:23,680 INFO L350 Elim1Store]: Elim1 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 9 case distinctions, treesize of input 436 treesize of output 442 [2022-11-20 18:55:23,827 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 18:55:23,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:55:23,841 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-11-20 18:55:23,857 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-20 18:55:23,862 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 9 [2022-11-20 18:55:23,901 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 18:55:23,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 26 [2022-11-20 18:55:23,941 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 18:55:23,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2022-11-20 18:55:23,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 18:55:23,962 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 18:55:23,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 18:55:23,985 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-11-20 18:55:24,121 INFO L321 Elim1Store]: treesize reduction 128, result has 12.9 percent of original size [2022-11-20 18:55:24,121 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 163 treesize of output 158 [2022-11-20 18:55:24,169 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 18:55:24,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 144 [2022-11-20 18:55:24,213 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 18:55:24,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 132 [2022-11-20 18:55:24,260 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-20 18:55:24,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 40 [2022-11-20 18:55:24,300 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-20 18:55:24,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 40 [2022-11-20 18:55:24,502 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:55:26,137 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1479#(and (not (= |ULTIMATE.start_main_~t~0#1.base| 0)) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_main_~p~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~t~0#1.base|) |ULTIMATE.start_main_~t~0#1.offset|) 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~t~0#1.base|) (+ |ULTIMATE.start_main_~t~0#1.offset| 4)) 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 1)) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~t~0#1.offset| 0) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~t~0#1.base|) (+ |ULTIMATE.start_main_~t~0#1.offset| 4)) 0) (<= 0 |#StackHeapBarrier|) (not (= 0 |ULTIMATE.start_main_~p~0#1.base|)) (= |#NULL.base| 0))' at error location [2022-11-20 18:55:26,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 18:55:26,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:55:26,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-11-20 18:55:26,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675623086] [2022-11-20 18:55:26,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 18:55:26,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 18:55:26,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:55:26,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 18:55:26,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=843, Unknown=3, NotChecked=186, Total=1190 [2022-11-20 18:55:26,140 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:55:26,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:55:26,657 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-11-20 18:55:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 18:55:26,657 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 18:55:26,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:55:26,658 INFO L225 Difference]: With dead ends: 33 [2022-11-20 18:55:26,658 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 18:55:26,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=190, Invalid=941, Unknown=3, NotChecked=198, Total=1332 [2022-11-20 18:55:26,659 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:55:26,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 74 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2022-11-20 18:55:26,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 18:55:26,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-11-20 18:55:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 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) [2022-11-20 18:55:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-11-20 18:55:26,666 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2022-11-20 18:55:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:55:26,666 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-11-20 18:55:26,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:55:26,667 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-11-20 18:55:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 18:55:26,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:55:26,668 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:55:26,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 18:55:26,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 18:55:26,874 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:55:26,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:55:26,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1473223986, now seen corresponding path program 4 times [2022-11-20 18:55:26,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:55:26,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979685013] [2022-11-20 18:55:26,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:55:26,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:55:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:55:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:55:27,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:55:27,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979685013] [2022-11-20 18:55:27,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979685013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:55:27,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081824886] [2022-11-20 18:55:27,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 18:55:27,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:55:27,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:55:27,977 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:55:27,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 18:55:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:55:28,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-20 18:55:28,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:55:28,111 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-20 18:55:28,169 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 18:55:28,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 18:55:28,222 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-20 18:55:28,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 18:55:28,304 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-20 18:55:28,333 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-20 18:55:28,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 18:55:28,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 18:55:28,437 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 18:55:28,437 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 51 [2022-11-20 18:55:28,443 INFO L350 Elim1Store]: Elim1 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 22 [2022-11-20 18:55:28,554 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-20 18:55:28,554 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 80 [2022-11-20 18:55:28,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 49 [2022-11-20 18:55:28,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:28,566 INFO L350 Elim1Store]: Elim1 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 45 treesize of output 50 [2022-11-20 18:55:28,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:28,765 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-11-20 18:55:28,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 46 [2022-11-20 18:55:28,775 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 18:55:28,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2022-11-20 18:55:28,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 18:55:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:55:28,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:55:28,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1028 treesize of output 912 [2022-11-20 18:55:29,003 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (and (forall ((v_ArrVal_678 (Array Int Int)) (v_ArrVal_677 (Array Int Int))) (= |c_ULTIMATE.start_main_~p~0#1.base| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_677))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_678) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) 4)))) (forall ((v_ArrVal_678 (Array Int Int)) (v_ArrVal_677 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_678)) (.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_677))) (let ((.cse3 (select (select .cse5 |c_ULTIMATE.start_main_~a~0#1.base|) .cse1)) (.cse4 (+ (select (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) 4))) (or (not (= (select (select .cse2 .cse3) .cse4) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (not (= |c_ULTIMATE.start_main_~p~0#1.base| (select (select .cse5 .cse3) .cse4))))))) (forall ((v_ArrVal_678 (Array Int Int)) (v_ArrVal_677 (Array Int Int))) (= (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_678))) (select (select .cse6 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_677) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1)) (+ (select (select .cse6 |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) 4))) |c_ULTIMATE.start_main_~p~0#1.offset|)))) is different from false [2022-11-20 18:55:29,106 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) .cse4 |c_ULTIMATE.start_main_~t~0#1.base|))) (.cse3 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base|))) (and (forall ((v_ArrVal_678 (Array Int Int)) (v_ArrVal_677 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.offset_109| Int)) (= (select (let ((.cse0 (store .cse2 |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_677))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| (store .cse3 .cse4 |v_ULTIMATE.start_main_~p~0#1.offset_109|)) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_678) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) 4)) |c_ULTIMATE.start_main_~t~0#1.base|)) (forall ((v_ArrVal_678 (Array Int Int)) (v_ArrVal_677 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.offset_109| Int)) (= |v_ULTIMATE.start_main_~p~0#1.offset_109| (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| (store .cse3 .cse4 |v_ULTIMATE.start_main_~p~0#1.offset_109|)) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_678))) (select (select .cse5 (select (select (store .cse2 |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_677) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1)) (+ (select (select .cse5 |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) 4))))) (forall ((v_ArrVal_678 (Array Int Int)) (v_ArrVal_677 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.offset_109| Int)) (let ((.cse9 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| (store .cse3 .cse4 |v_ULTIMATE.start_main_~p~0#1.offset_109|)) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_678)) (.cse6 (store .cse2 |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_677))) (let ((.cse7 (select (select .cse6 |c_ULTIMATE.start_main_~a~0#1.base|) .cse1)) (.cse8 (+ (select (select .cse9 |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) 4))) (or (not (= (select (select .cse6 .cse7) .cse8) |c_ULTIMATE.start_main_~t~0#1.base|)) (not (= (+ 4 |v_ULTIMATE.start_main_~p~0#1.offset_109|) (select (select .cse9 .cse7) .cse8)))))))))) is different from false [2022-11-20 18:55:29,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:29,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 222 treesize of output 256 [2022-11-20 18:55:29,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:29,187 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 200 treesize of output 179 [2022-11-20 18:55:29,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 27 treesize of output 13 [2022-11-20 18:55:29,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 27 treesize of output 13 [2022-11-20 18:55:29,267 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 1 [2022-11-20 18:55:29,283 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 1 [2022-11-20 18:55:29,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:29,552 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 86 [2022-11-20 18:55:29,562 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:29,562 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 66 [2022-11-20 18:55:29,580 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:29,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 452 treesize of output 445 [2022-11-20 18:55:30,915 INFO L321 Elim1Store]: treesize reduction 414, result has 57.9 percent of original size [2022-11-20 18:55:30,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 5848 treesize of output 5689 [2022-11-20 18:55:31,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:31,071 INFO L350 Elim1Store]: Elim1 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 5260 treesize of output 4040 [2022-11-20 18:55:31,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:31,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 4068 treesize of output 3154 [2022-11-20 18:55:31,594 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:55:31,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 3096 treesize of output 2692 [2022-11-20 18:55:31,813 INFO L350 Elim1Store]: Elim1 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 2634 treesize of output 2202 [2022-11-20 19:02:18,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:18,565 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 86 [2022-11-20 19:02:18,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:18,583 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 66 [2022-11-20 19:02:18,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:02:18,603 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:18,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 107 [2022-11-20 19:02:18,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:02:18,894 INFO L321 Elim1Store]: treesize reduction 38, result has 82.6 percent of original size [2022-11-20 19:02:18,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 598 treesize of output 651 [2022-11-20 19:02:18,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:18,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 566 treesize of output 434 [2022-11-20 19:02:18,983 INFO L350 Elim1Store]: Elim1 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 274 treesize of output 230 [2022-11-20 19:02:19,015 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:19,015 INFO L350 Elim1Store]: Elim1 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 292 treesize of output 284 [2022-11-20 19:02:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-11-20 19:02:24,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081824886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:02:24,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [923253892] [2022-11-20 19:02:24,267 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 19:02:24,267 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:02:24,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:02:24,268 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:02:24,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:02:24,317 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-20 19:02:24,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-20 19:02:24,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-20 19:02:24,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:24,350 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 19:02:24,403 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-20 19:02:24,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-11-20 19:02:24,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 19:02:24,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 19:02:24,500 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:02:24,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-20 19:02:24,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:02:24,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:02:24,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:24,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 19:02:24,595 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-20 19:02:24,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 16 [2022-11-20 19:02:24,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:24,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 42 [2022-11-20 19:02:24,703 INFO L321 Elim1Store]: treesize reduction 90, result has 35.3 percent of original size [2022-11-20 19:02:24,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 43 treesize of output 77 [2022-11-20 19:02:24,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 19:02:24,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:24,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:24,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-20 19:02:24,823 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-20 19:02:24,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 368 treesize of output 323 [2022-11-20 19:02:24,875 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-20 19:02:24,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 314 treesize of output 311 [2022-11-20 19:02:24,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:02:24,959 INFO L321 Elim1Store]: treesize reduction 146, result has 13.1 percent of original size [2022-11-20 19:02:24,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 308 treesize of output 289 [2022-11-20 19:02:25,236 INFO L321 Elim1Store]: treesize reduction 100, result has 18.7 percent of original size [2022-11-20 19:02:25,237 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 478 treesize of output 418 [2022-11-20 19:02:25,314 INFO L321 Elim1Store]: treesize reduction 104, result has 19.4 percent of original size [2022-11-20 19:02:25,315 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 478 treesize of output 376 [2022-11-20 19:02:25,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:02:25,406 INFO L321 Elim1Store]: treesize reduction 202, result has 20.2 percent of original size [2022-11-20 19:02:25,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 474 treesize of output 480 [2022-11-20 19:02:25,531 INFO L321 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2022-11-20 19:02:25,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 453 treesize of output 459 [2022-11-20 19:02:25,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:25,705 INFO L321 Elim1Store]: treesize reduction 234, result has 17.6 percent of original size [2022-11-20 19:02:25,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 458 treesize of output 481 [2022-11-20 19:02:26,003 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 19:02:26,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:02:26,016 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-11-20 19:02:26,032 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-20 19:02:26,036 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 9 [2022-11-20 19:02:26,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 19:02:26,080 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 19:02:26,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2022-11-20 19:02:26,117 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 19:02:26,118 INFO L350 Elim1Store]: Elim1 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 26 [2022-11-20 19:02:26,135 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 19:02:26,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:02:26,149 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-11-20 19:02:26,267 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 19:02:26,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 148 [2022-11-20 19:02:26,336 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-20 19:02:26,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 136 [2022-11-20 19:02:26,408 INFO L321 Elim1Store]: treesize reduction 128, result has 12.9 percent of original size [2022-11-20 19:02:26,408 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 139 treesize of output 134 [2022-11-20 19:02:26,461 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-20 19:02:26,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 40 [2022-11-20 19:02:26,509 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-20 19:02:26,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 40 [2022-11-20 19:02:26,707 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:02:27,602 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1731#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:02:27,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:02:27,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:02:27,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-11-20 19:02:27,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237959342] [2022-11-20 19:02:27,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:02:27,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 19:02:27,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:02:27,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 19:02:27,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=727, Unknown=3, NotChecked=110, Total=930 [2022-11-20 19:02:27,604 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2022-11-20 19:02:33,125 WARN L233 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 68 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:02:33,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:02:33,488 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2022-11-20 19:02:33,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 19:02:33,489 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 19:02:33,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:02:33,491 INFO L225 Difference]: With dead ends: 39 [2022-11-20 19:02:33,491 INFO L226 Difference]: Without dead ends: 37 [2022-11-20 19:02:33,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=131, Invalid=1064, Unknown=3, NotChecked=134, Total=1332 [2022-11-20 19:02:33,493 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:02:33,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 109 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2022-11-20 19:02:33,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-20 19:02:33,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-11-20 19:02:33,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:33,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-11-20 19:02:33,500 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2022-11-20 19:02:33,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:02:33,501 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-11-20 19:02:33,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2022-11-20 19:02:33,501 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-11-20 19:02:33,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 19:02:33,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:02:33,502 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:02:33,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-20 19:02:33,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 19:02:33,705 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:02:33,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:02:33,705 INFO L85 PathProgramCache]: Analyzing trace with hash -847489801, now seen corresponding path program 5 times [2022-11-20 19:02:33,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:02:33,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203226677] [2022-11-20 19:02:33,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:02:33,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:02:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:02:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:02:35,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:02:35,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203226677] [2022-11-20 19:02:35,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203226677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:02:35,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986150783] [2022-11-20 19:02:35,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:02:35,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:02:35,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:02:35,089 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:02:35,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62a26cbc-6e90-4900-aa15-5a14efd037e4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 19:02:35,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 19:02:35,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:02:35,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-20 19:02:35,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:02:35,354 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-20 19:02:35,433 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 19:02:35,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 19:02:35,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:02:35,519 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-20 19:02:35,586 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-20 19:02:35,646 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-20 19:02:35,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 33 [2022-11-20 19:02:35,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:02:35,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 19:02:35,867 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 19:02:35,867 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 74 [2022-11-20 19:02:35,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:35,890 INFO L350 Elim1Store]: Elim1 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 22 [2022-11-20 19:02:35,903 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 26 [2022-11-20 19:02:36,094 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-20 19:02:36,095 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 81 [2022-11-20 19:02:36,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:36,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:36,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:36,108 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 35 [2022-11-20 19:02:36,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:36,125 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2022-11-20 19:02:36,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:36,162 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-11-20 19:02:36,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-11-20 19:02:36,351 INFO L321 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-20 19:02:36,352 INFO L350 Elim1Store]: Elim1 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 209 treesize of output 116 [2022-11-20 19:02:36,358 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-11-20 19:02:36,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:36,371 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 145 [2022-11-20 19:02:36,664 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-20 19:02:36,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 325 treesize of output 224 [2022-11-20 19:02:36,721 INFO L321 Elim1Store]: treesize reduction 159, result has 15.0 percent of original size [2022-11-20 19:02:36,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 293 treesize of output 214 [2022-11-20 19:02:36,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:36,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 119 [2022-11-20 19:02:36,755 INFO L350 Elim1Store]: Elim1 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 54 treesize of output 53 [2022-11-20 19:02:36,967 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-11-20 19:02:36,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 249 treesize of output 106 [2022-11-20 19:02:36,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 33 [2022-11-20 19:02:37,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2022-11-20 19:02:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:02:37,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:02:37,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:37,135 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 43 treesize of output 47 [2022-11-20 19:02:37,151 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_823 (Array Int Int)) (v_ArrVal_819 Int) (v_arrayElimArr_27 (Array Int Int))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (or (not (= (select v_arrayElimArr_27 .cse0) 0)) (= (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| 1) .cse0 v_ArrVal_819)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_823) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_arrayElimArr_27) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) 1)))) is different from false [2022-11-20 19:02:37,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:37,363 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 58 treesize of output 62 [2022-11-20 19:02:37,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:37,375 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 69 treesize of output 73 [2022-11-20 19:02:37,736 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:37,736 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 98 treesize of output 102 [2022-11-20 19:02:37,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:37,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 102 [2022-11-20 19:02:37,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:02:37,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:37,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 750 treesize of output 756 [2022-11-20 19:02:37,822 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:37,822 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 680 treesize of output 648 [2022-11-20 19:02:37,842 INFO L350 Elim1Store]: Elim1 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 314 treesize of output 268 [2022-11-20 19:02:37,891 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 4 [2022-11-20 19:02:38,281 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:38,282 INFO L350 Elim1Store]: Elim1 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 1761 treesize of output 1556 [2022-11-20 19:02:38,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:02:38,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:02:38,661 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-20 19:02:38,702 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:38,702 INFO L350 Elim1Store]: Elim1 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 125 treesize of output 106 [2022-11-20 19:02:38,747 INFO L350 Elim1Store]: Elim1 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 382 treesize of output 313 [2022-11-20 19:02:38,763 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 1899 treesize of output 1713 [2022-11-20 19:02:38,861 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 4 [2022-11-20 19:02:38,886 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 4 [2022-11-20 19:02:38,899 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 4 [2022-11-20 19:02:38,964 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 4 [2022-11-20 19:02:39,354 INFO L350 Elim1Store]: Elim1 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 64 treesize of output 58 [2022-11-20 19:02:39,556 INFO L350 Elim1Store]: Elim1 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 68 treesize of output 52 [2022-11-20 19:02:40,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:40,916 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-11-20 19:02:40,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:40,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 724 treesize of output 705 [2022-11-20 19:02:40,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:40,982 INFO L350 Elim1Store]: Elim1 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 696 treesize of output 638 [2022-11-20 19:02:41,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:41,030 INFO L350 Elim1Store]: Elim1 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 632 treesize of output 606 [2022-11-20 19:02:41,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:41,064 INFO L350 Elim1Store]: Elim1 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 314 treesize of output 302 [2022-11-20 19:02:41,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:41,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 35 [2022-11-20 19:02:41,136 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:41,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 169 [2022-11-20 19:02:41,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:41,168 INFO L350 Elim1Store]: Elim1 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 756 treesize of output 608 [2022-11-20 19:02:41,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:41,196 INFO L350 Elim1Store]: Elim1 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 599 treesize of output 535 [2022-11-20 19:02:41,218 INFO L350 Elim1Store]: Elim1 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 110 treesize of output 94 [2022-11-20 19:02:43,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:43,665 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 61 [2022-11-20 19:02:43,685 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:43,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1501 treesize of output 1458 [2022-11-20 19:02:43,718 INFO L350 Elim1Store]: Elim1 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 1443 treesize of output 1315 [2022-11-20 19:02:43,748 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:43,749 INFO L350 Elim1Store]: Elim1 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 1340 treesize of output 1052 [2022-11-20 19:02:43,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:02:43,784 INFO L350 Elim1Store]: Elim1 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 1038 treesize of output 828 [2022-11-20 19:03:13,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:03:13,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 71 treesize of output 61 [2022-11-20 19:03:13,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:03:13,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2661 treesize of output 2570 [2022-11-20 19:03:13,662 INFO L350 Elim1Store]: Elim1 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 2555 treesize of output 2299 [2022-11-20 19:03:13,701 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:03:13,702 INFO L350 Elim1Store]: Elim1 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 2319 treesize of output 1907 [2022-11-20 19:03:13,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:03:13,738 INFO L350 Elim1Store]: Elim1 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 1906 treesize of output 1666