./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array6_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array6_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh --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 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 --- 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-2329fc7 [2022-12-14 07:30:43,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:30:43,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:30:43,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:30:43,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:30:43,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:30:43,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:30:43,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:30:43,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:30:43,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:30:43,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:30:43,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:30:43,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:30:43,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:30:43,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:30:43,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:30:43,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:30:43,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:30:43,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:30:43,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:30:43,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:30:43,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:30:43,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:30:43,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:30:43,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:30:43,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:30:43,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:30:43,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:30:43,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:30:43,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:30:43,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:30:43,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:30:43,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:30:43,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:30:43,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:30:43,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:30:43,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:30:43,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:30:43,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:30:43,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:30:43,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:30:43,651 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:30:43,666 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:30:43,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:30:43,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:30:43,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:30:43,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:30:43,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:30:43,667 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:30:43,667 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:30:43,667 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:30:43,672 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:30:43,672 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:30:43,672 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:30:43,672 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:30:43,672 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:30:43,672 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:30:43,672 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:30:43,672 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:30:43,672 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:30:43,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:30:43,673 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:30:43,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:30:43,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:30:43,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:30:43,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:30:43,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:30:43,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:30:43,674 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:30:43,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:30:43,674 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:30:43,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:30:43,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:30:43,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:30:43,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:30:43,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:30:43,674 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:30:43,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:30:43,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:30:43,675 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:30:43,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:30:43,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:30:43,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:30:43,675 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_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 [2022-12-14 07:30:43,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:30:43,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:30:43,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:30:43,854 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:30:43,854 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:30:43,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-patterns/array6_pattern.c [2022-12-14 07:30:46,362 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:30:46,524 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:30:46,525 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/sv-benchmarks/c/array-patterns/array6_pattern.c [2022-12-14 07:30:46,529 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/data/3b3569d5e/bbb1ae1c23c34eb7a27c1b4a67dc6372/FLAG9c4b351dd [2022-12-14 07:30:46,947 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/data/3b3569d5e/bbb1ae1c23c34eb7a27c1b4a67dc6372 [2022-12-14 07:30:46,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:30:46,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:30:46,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:30:46,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:30:46,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:30:46,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:30:46" (1/1) ... [2022-12-14 07:30:46,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@271a9d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:30:46, skipping insertion in model container [2022-12-14 07:30:46,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:30:46" (1/1) ... [2022-12-14 07:30:46,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:30:46,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:30:47,076 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_45f688a1-8c5e-441d-baa8-5384e75e4889/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2022-12-14 07:30:47,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:30:47,096 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:30:47,104 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_45f688a1-8c5e-441d-baa8-5384e75e4889/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2022-12-14 07:30:47,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:30:47,119 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:30:47,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:30:47 WrapperNode [2022-12-14 07:30:47,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:30:47,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:30:47,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:30:47,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:30:47,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:30:47" (1/1) ... [2022-12-14 07:30:47,130 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:30:47" (1/1) ... [2022-12-14 07:30:47,142 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-12-14 07:30:47,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:30:47,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:30:47,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:30:47,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:30:47,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:30:47" (1/1) ... [2022-12-14 07:30:47,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:30:47" (1/1) ... [2022-12-14 07:30:47,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:30:47" (1/1) ... [2022-12-14 07:30:47,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:30:47" (1/1) ... [2022-12-14 07:30:47,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:30:47" (1/1) ... [2022-12-14 07:30:47,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:30:47" (1/1) ... [2022-12-14 07:30:47,158 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:30:47" (1/1) ... [2022-12-14 07:30:47,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:30:47" (1/1) ... [2022-12-14 07:30:47,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:30:47,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:30:47,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:30:47,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:30:47,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:30:47" (1/1) ... [2022-12-14 07:30:47,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:30:47,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:30:47,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:30:47,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:30:47,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:30:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 07:30:47,216 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 07:30:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:30:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:30:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:30:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:30:47,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:30:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 07:30:47,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:30:47,271 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:30:47,272 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:30:47,379 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:30:47,404 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:30:47,404 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 07:30:47,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:30:47 BoogieIcfgContainer [2022-12-14 07:30:47,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:30:47,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:30:47,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:30:47,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:30:47,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:30:46" (1/3) ... [2022-12-14 07:30:47,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348fac24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:30:47, skipping insertion in model container [2022-12-14 07:30:47,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:30:47" (2/3) ... [2022-12-14 07:30:47,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348fac24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:30:47, skipping insertion in model container [2022-12-14 07:30:47,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:30:47" (3/3) ... [2022-12-14 07:30:47,416 INFO L112 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2022-12-14 07:30:47,435 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:30:47,435 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:30:47,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:30:47,482 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;@c3a63e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:30:47,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:30:47,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:30:47,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 07:30:47,493 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:30:47,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:30:47,494 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:30:47,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:30:47,500 INFO L85 PathProgramCache]: Analyzing trace with hash -939400662, now seen corresponding path program 1 times [2022-12-14 07:30:47,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:30:47,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015311634] [2022-12-14 07:30:47,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:47,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:30:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:30:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:30:47,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:30:47,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015311634] [2022-12-14 07:30:47,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015311634] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:30:47,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:30:47,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:30:47,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014267128] [2022-12-14 07:30:47,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:30:47,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 07:30:47,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:30:47,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 07:30:47,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:30:47,689 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:30:47,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:30:47,721 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-12-14 07:30:47,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 07:30:47,724 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-12-14 07:30:47,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:30:47,729 INFO L225 Difference]: With dead ends: 24 [2022-12-14 07:30:47,730 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 07:30:47,733 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 [2022-12-14 07:30:47,736 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:30:47,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:30:47,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 07:30:47,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 07:30:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:30:47,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-12-14 07:30:47,767 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2022-12-14 07:30:47,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:30:47,768 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-12-14 07:30:47,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:30:47,769 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-12-14 07:30:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 07:30:47,770 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:30:47,770 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:30:47,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:30:47,771 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:30:47,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:30:47,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2125331809, now seen corresponding path program 1 times [2022-12-14 07:30:47,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:30:47,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805512506] [2022-12-14 07:30:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:47,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:30:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:30:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:30:47,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:30:47,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805512506] [2022-12-14 07:30:47,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805512506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:30:47,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:30:47,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:30:47,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124347314] [2022-12-14 07:30:47,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:30:47,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:30:47,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:30:47,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:30:47,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:30:47,946 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:30:47,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:30:47,978 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-12-14 07:30:47,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:30:47,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-12-14 07:30:47,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:30:47,979 INFO L225 Difference]: With dead ends: 19 [2022-12-14 07:30:47,979 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 07:30:47,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:30:47,981 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:30:47,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:30:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 07:30:47,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 07:30:47,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:30:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-12-14 07:30:47,985 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 16 [2022-12-14 07:30:47,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:30:47,985 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-12-14 07:30:47,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:30:47,985 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-12-14 07:30:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 07:30:47,986 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:30:47,986 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:30:47,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:30:47,986 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:30:47,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:30:47,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1460511396, now seen corresponding path program 1 times [2022-12-14 07:30:47,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:30:47,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974134213] [2022-12-14 07:30:47,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:47,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:30:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:30:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:30:48,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:30:48,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974134213] [2022-12-14 07:30:48,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974134213] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:30:48,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:30:48,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:30:48,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009968395] [2022-12-14 07:30:48,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:30:48,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:30:48,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:30:48,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:30:48,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:30:48,086 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:30:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:30:48,125 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-12-14 07:30:48,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:30:48,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-12-14 07:30:48,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:30:48,126 INFO L225 Difference]: With dead ends: 29 [2022-12-14 07:30:48,126 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 07:30:48,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:30:48,128 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:30:48,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 42 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:30:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 07:30:48,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 07:30:48,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:30:48,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-12-14 07:30:48,131 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 17 [2022-12-14 07:30:48,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:30:48,131 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-12-14 07:30:48,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:30:48,132 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-12-14 07:30:48,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 07:30:48,132 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:30:48,132 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:30:48,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:30:48,132 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:30:48,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:30:48,133 INFO L85 PathProgramCache]: Analyzing trace with hash 927643208, now seen corresponding path program 1 times [2022-12-14 07:30:48,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:30:48,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789038333] [2022-12-14 07:30:48,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:48,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:30:48,151 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:30:48,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567804807] [2022-12-14 07:30:48,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:48,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:30:48,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:30:48,153 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:30:48,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:30:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:30:48,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:30:48,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:30:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:30:48,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:30:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:30:48,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:30:48,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789038333] [2022-12-14 07:30:48,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:30:48,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567804807] [2022-12-14 07:30:48,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567804807] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:30:48,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [132485535] [2022-12-14 07:30:48,386 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:30:48,386 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:30:48,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:30:48,394 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:30:48,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:30:48,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:48,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:48,563 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:30:48,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:30:48,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:48,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:48,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 07:30:48,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:48,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:48,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:48,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-12-14 07:30:48,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:48,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:48,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:48,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:48,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:48,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:48,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:48,800 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 07:30:48,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-12-14 07:30:48,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:48,908 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:30:48,909 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:30:48,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:48,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:48,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:48,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:48,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:48,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:48,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:48,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:48,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:49,010 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:30:49,010 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 99 treesize of output 75 [2022-12-14 07:30:49,110 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:30:49,132 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:30:50,175 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '314#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:30:50,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:30:50,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:30:50,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-12-14 07:30:50,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47770959] [2022-12-14 07:30:50,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:30:50,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 07:30:50,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:30:50,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 07:30:50,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-12-14 07:30:50,178 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:30:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:30:50,319 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-12-14 07:30:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 07:30:50,320 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2022-12-14 07:30:50,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:30:50,321 INFO L225 Difference]: With dead ends: 49 [2022-12-14 07:30:50,322 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 07:30:50,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-12-14 07:30:50,324 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:30:50,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 54 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:30:50,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 07:30:50,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2022-12-14 07:30:50,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:30:50,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-12-14 07:30:50,328 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 18 [2022-12-14 07:30:50,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:30:50,328 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-12-14 07:30:50,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:30:50,328 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-12-14 07:30:50,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 07:30:50,329 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:30:50,329 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:30:50,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:30:50,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:30:50,531 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:30:50,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:30:50,532 INFO L85 PathProgramCache]: Analyzing trace with hash 603378120, now seen corresponding path program 2 times [2022-12-14 07:30:50,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:30:50,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497746810] [2022-12-14 07:30:50,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:50,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:30:50,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:30:50,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287071043] [2022-12-14 07:30:50,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:30:50,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:30:50,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:30:50,575 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:30:50,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:30:50,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 07:30:50,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:30:50,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:30:50,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:30:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:30:50,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:30:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:30:50,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:30:50,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497746810] [2022-12-14 07:30:50,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:30:50,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287071043] [2022-12-14 07:30:50,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287071043] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:30:50,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [646525359] [2022-12-14 07:30:50,723 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:30:50,723 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:30:50,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:30:50,723 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:30:50,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:30:50,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:50,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:50,802 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 07:30:50,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:30:50,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:50,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:50,872 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:30:50,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:30:50,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:50,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:50,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:50,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-12-14 07:30:51,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:51,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:51,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:51,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:51,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:51,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:51,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:51,043 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 07:30:51,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-12-14 07:30:51,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:51,111 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:30:51,112 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:30:51,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:51,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:51,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:51,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:51,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:51,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:51,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:51,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:51,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:51,188 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:30:51,189 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 99 treesize of output 75 [2022-12-14 07:30:51,255 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:30:51,271 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:30:52,133 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '570#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:30:52,133 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:30:52,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:30:52,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-12-14 07:30:52,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414098702] [2022-12-14 07:30:52,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:30:52,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 07:30:52,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:30:52,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 07:30:52,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-12-14 07:30:52,135 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 07:30:52,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:30:52,180 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-12-14 07:30:52,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:30:52,181 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-12-14 07:30:52,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:30:52,181 INFO L225 Difference]: With dead ends: 28 [2022-12-14 07:30:52,181 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 07:30:52,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-12-14 07:30:52,182 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:30:52,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 43 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:30:52,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 07:30:52,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-12-14 07:30:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:30:52,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-12-14 07:30:52,186 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2022-12-14 07:30:52,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:30:52,186 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-12-14 07:30:52,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 07:30:52,186 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-12-14 07:30:52,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 07:30:52,186 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:30:52,186 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:30:52,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 07:30:52,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:30:52,389 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:30:52,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:30:52,390 INFO L85 PathProgramCache]: Analyzing trace with hash 17300584, now seen corresponding path program 3 times [2022-12-14 07:30:52,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:30:52,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971685601] [2022-12-14 07:30:52,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:52,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:30:52,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:30:52,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090716181] [2022-12-14 07:30:52,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:30:52,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:30:52,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:30:52,404 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:30:52,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:30:52,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:30:52,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:30:52,507 WARN L261 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-14 07:30:52,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:30:52,529 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 10 treesize of output 8 [2022-12-14 07:30:52,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:52,560 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-12-14 07:30:52,564 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-12-14 07:30:52,567 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 8 treesize of output 7 [2022-12-14 07:30:52,573 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 8 treesize of output 7 [2022-12-14 07:30:52,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:52,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:52,614 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 73 treesize of output 52 [2022-12-14 07:30:52,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:52,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:52,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:52,673 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 57 treesize of output 53 [2022-12-14 07:30:52,966 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 07:30:52,966 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 2 case distinctions, treesize of input 330 treesize of output 213 [2022-12-14 07:30:52,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 158 treesize of output 130 [2022-12-14 07:30:52,980 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-12-14 07:30:53,014 INFO L321 Elim1Store]: treesize reduction 111, result has 8.3 percent of original size [2022-12-14 07:30:53,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 221 [2022-12-14 07:30:53,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:53,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:53,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:53,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:53,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:53,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:53,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 124 [2022-12-14 07:30:53,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:53,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:53,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:53,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:53,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:53,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:53,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:53,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2022-12-14 07:30:53,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 78 treesize of output 72 [2022-12-14 07:30:53,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 65 [2022-12-14 07:30:53,121 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 15 treesize of output 9 [2022-12-14 07:30:53,214 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 20 treesize of output 1 [2022-12-14 07:30:57,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:57,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:57,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:57,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:57,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:57,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:57,591 INFO L321 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2022-12-14 07:30:57,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 54 [2022-12-14 07:30:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:30:57,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:30:57,893 WARN L837 $PredicateComparison]: unable to prove that (or (not (< 2 c_~ARR_SIZE~0)) (forall ((v_ArrVal_218 (Array Int Int)) (|ULTIMATE.start_main_~index~0#1| Int) (v_ArrVal_213 (Array Int Int))) (or (<= |ULTIMATE.start_main_~index~0#1| 0) (= (let ((.cse3 (* 4 |ULTIMATE.start_main_~index~0#1|))) (let ((.cse1 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_218) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ .cse3 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_213) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ .cse3 (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset|)) (select .cse4 (+ .cse3 |c_ULTIMATE.start_main_~#array2~0#1.offset| 4))))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ .cse3 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (+ (select .cse2 (+ .cse3 |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse2 (+ .cse3 |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4))))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)))))) 0) (<= c_~ARR_SIZE~0 (+ |ULTIMATE.start_main_~index~0#1| 1))))) is different from false [2022-12-14 07:30:57,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:30:57,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971685601] [2022-12-14 07:30:57,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:30:57,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090716181] [2022-12-14 07:30:57,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090716181] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:30:57,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [552169442] [2022-12-14 07:30:57,898 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:30:57,898 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:30:57,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:30:57,899 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:30:57,899 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:30:57,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:57,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:57,972 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:30:57,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:30:57,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:57,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:57,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 07:30:58,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:58,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:58,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:58,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-12-14 07:30:58,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:58,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:58,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:58,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:58,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:58,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:58,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:58,112 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 07:30:58,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-12-14 07:30:58,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:58,183 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:30:58,184 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:30:58,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:58,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:58,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:58,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:58,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:58,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:58,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:58,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:58,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:30:58,250 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:30:58,250 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 99 treesize of output 75 [2022-12-14 07:30:58,300 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:30:58,313 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:30:59,614 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '789#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:30:59,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:30:59,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:30:59,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-12-14 07:30:59,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88583293] [2022-12-14 07:30:59,614 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 07:30:59,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 07:30:59,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:30:59,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 07:30:59,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1227, Unknown=5, NotChecked=72, Total=1482 [2022-12-14 07:30:59,616 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:31:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:04,530 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-12-14 07:31:04,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 07:31:04,531 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-12-14 07:31:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:04,532 INFO L225 Difference]: With dead ends: 45 [2022-12-14 07:31:04,532 INFO L226 Difference]: Without dead ends: 42 [2022-12-14 07:31:04,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=267, Invalid=1799, Unknown=8, NotChecked=88, Total=2162 [2022-12-14 07:31:04,533 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:04,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 81 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:31:04,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-14 07:31:04,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2022-12-14 07:31:04,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:31:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-12-14 07:31:04,540 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2022-12-14 07:31:04,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:04,540 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-12-14 07:31:04,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:31:04,540 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-12-14 07:31:04,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 07:31:04,541 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:04,541 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:04,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 07:31:04,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 07:31:04,743 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:31:04,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:04,744 INFO L85 PathProgramCache]: Analyzing trace with hash 536052861, now seen corresponding path program 4 times [2022-12-14 07:31:04,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:04,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45265126] [2022-12-14 07:31:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:04,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:04,779 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:31:04,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235273322] [2022-12-14 07:31:04,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:31:04,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:04,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:31:04,781 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:31:04,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:31:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:31:04,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:31:04,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:31:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:31:04,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:31:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:31:04,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:04,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45265126] [2022-12-14 07:31:04,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:31:04,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235273322] [2022-12-14 07:31:04,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235273322] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:31:04,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1120324815] [2022-12-14 07:31:04,934 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:31:04,934 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:31:04,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:31:04,935 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:31:04,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:31:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:04,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:05,002 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 07:31:05,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:31:05,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:05,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:05,063 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:31:05,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:31:05,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:05,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:05,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 07:31:05,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:05,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:05,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:05,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:05,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:05,196 INFO L321 Elim1Store]: treesize reduction 272, result has 16.3 percent of original size [2022-12-14 07:31:05,197 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 9 case distinctions, treesize of input 371 treesize of output 364 [2022-12-14 07:31:05,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:05,287 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:31:05,287 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 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:31:05,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:05,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:05,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:05,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:05,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:05,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:05,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:05,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:05,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:05,339 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:31:05,340 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 99 treesize of output 75 [2022-12-14 07:31:05,401 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:31:05,413 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:31:06,335 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1086#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:31:06,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:31:06,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:31:06,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-12-14 07:31:06,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517784720] [2022-12-14 07:31:06,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:31:06,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 07:31:06,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:06,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 07:31:06,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-12-14 07:31:06,337 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:31:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:06,438 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-12-14 07:31:06,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 07:31:06,438 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-12-14 07:31:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:06,439 INFO L225 Difference]: With dead ends: 57 [2022-12-14 07:31:06,439 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 07:31:06,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 07:31:06,440 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 38 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:06,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 89 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:31:06,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 07:31:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-12-14 07:31:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:31:06,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-12-14 07:31:06,453 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 23 [2022-12-14 07:31:06,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:06,454 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-12-14 07:31:06,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:31:06,454 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-12-14 07:31:06,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 07:31:06,455 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:06,455 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:06,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 07:31:06,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:06,656 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:31:06,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:06,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1121554244, now seen corresponding path program 5 times [2022-12-14 07:31:06,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:06,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216260133] [2022-12-14 07:31:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:06,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:06,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:31:06,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671351310] [2022-12-14 07:31:06,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:31:06,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:06,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:31:06,699 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:31:06,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:31:06,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 07:31:06,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:31:06,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:31:06,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:31:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:31:06,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:31:06,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:31:06,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:06,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216260133] [2022-12-14 07:31:06,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:31:06,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671351310] [2022-12-14 07:31:06,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671351310] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:31:06,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [15807068] [2022-12-14 07:31:06,909 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:31:06,910 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:31:06,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:31:06,910 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:31:06,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:31:06,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:06,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:06,977 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 07:31:06,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:31:06,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:06,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:07,036 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:31:07,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:31:07,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:07,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:07,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:07,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-12-14 07:31:07,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:07,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:07,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:07,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:07,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:07,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:07,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:07,168 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 07:31:07,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-12-14 07:31:07,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:07,224 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:31:07,224 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:31:07,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:07,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:07,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:07,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:07,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:07,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:07,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:07,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:07,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:07,283 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:31:07,283 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 99 treesize of output 75 [2022-12-14 07:31:07,346 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:31:07,367 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:31:08,345 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1408#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:31:08,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:31:08,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:31:08,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-12-14 07:31:08,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239884817] [2022-12-14 07:31:08,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:31:08,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 07:31:08,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:08,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 07:31:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-12-14 07:31:08,347 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:31:08,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:08,500 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2022-12-14 07:31:08,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 07:31:08,500 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-12-14 07:31:08,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:08,501 INFO L225 Difference]: With dead ends: 48 [2022-12-14 07:31:08,501 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 07:31:08,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 07:31:08,502 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:08,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 95 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:31:08,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 07:31:08,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-12-14 07:31:08,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:31:08,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-12-14 07:31:08,512 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2022-12-14 07:31:08,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:08,512 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-12-14 07:31:08,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:31:08,512 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-12-14 07:31:08,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 07:31:08,513 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:08,513 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:08,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 07:31:08,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 07:31:08,715 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:31:08,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:08,716 INFO L85 PathProgramCache]: Analyzing trace with hash 408177953, now seen corresponding path program 6 times [2022-12-14 07:31:08,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:08,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961821108] [2022-12-14 07:31:08,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:08,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:08,752 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:31:08,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858975749] [2022-12-14 07:31:08,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:31:08,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:08,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:31:08,755 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:31:08,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:31:08,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:31:08,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:31:08,912 WARN L261 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 105 conjunts are in the unsatisfiable core [2022-12-14 07:31:08,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:31:08,931 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 10 treesize of output 8 [2022-12-14 07:31:08,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:08,957 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-12-14 07:31:08,960 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 8 treesize of output 7 [2022-12-14 07:31:08,963 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 19 treesize of output 18 [2022-12-14 07:31:08,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:08,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:08,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:08,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 41 [2022-12-14 07:31:09,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:09,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:09,058 INFO L321 Elim1Store]: treesize reduction 42, result has 31.1 percent of original size [2022-12-14 07:31:09,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 99 treesize of output 82 [2022-12-14 07:31:09,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:09,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:09,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:09,134 INFO L321 Elim1Store]: treesize reduction 45, result has 22.4 percent of original size [2022-12-14 07:31:09,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 164 treesize of output 103 [2022-12-14 07:31:09,647 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 07:31:09,647 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 2 case distinctions, treesize of input 419 treesize of output 280 [2022-12-14 07:31:09,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 158 treesize of output 130 [2022-12-14 07:31:09,667 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-12-14 07:31:09,710 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-12-14 07:31:09,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 275 treesize of output 298 [2022-12-14 07:31:09,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,795 INFO L321 Elim1Store]: treesize reduction 154, result has 16.8 percent of original size [2022-12-14 07:31:09,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 171 treesize of output 227 [2022-12-14 07:31:09,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,869 INFO L321 Elim1Store]: treesize reduction 81, result has 24.3 percent of original size [2022-12-14 07:31:09,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 91 [2022-12-14 07:31:09,953 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 0 case distinctions, treesize of input 40 treesize of output 29 [2022-12-14 07:31:09,973 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-12-14 07:31:09,973 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 2 case distinctions, treesize of input 217 treesize of output 182 [2022-12-14 07:31:09,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:09,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:10,004 INFO L321 Elim1Store]: treesize reduction 60, result has 14.3 percent of original size [2022-12-14 07:31:10,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 102 treesize of output 94 [2022-12-14 07:31:10,031 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 17 treesize of output 11 [2022-12-14 07:31:10,818 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2022-12-14 07:31:10,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 183 treesize of output 71 [2022-12-14 07:31:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:31:10,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:31:11,116 WARN L837 $PredicateComparison]: unable to prove that (or (not (< 3 c_~ARR_SIZE~0)) (forall ((v_ArrVal_458 (Array Int Int)) (v_ArrVal_456 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse1 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_456) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_458) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4)) (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3))))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)))))) 0))) is different from false [2022-12-14 07:31:13,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:13,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961821108] [2022-12-14 07:31:13,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:31:13,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858975749] [2022-12-14 07:31:13,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858975749] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:31:13,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542773439] [2022-12-14 07:31:13,269 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:31:13,269 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:31:13,269 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:31:13,269 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:31:13,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:31:13,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:13,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:13,334 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:31:13,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:31:13,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:13,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:13,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 07:31:13,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:13,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:13,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:13,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-12-14 07:31:13,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:13,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:13,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:13,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:13,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:13,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:13,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:13,460 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 07:31:13,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-12-14 07:31:13,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:13,525 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:31:13,526 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:31:13,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:13,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:13,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:13,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:13,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:13,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:13,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:13,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:13,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:13,581 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:31:13,581 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 99 treesize of output 75 [2022-12-14 07:31:13,641 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:31:13,660 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:31:15,189 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1701#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:31:15,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:31:15,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:31:15,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-12-14 07:31:15,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709910196] [2022-12-14 07:31:15,190 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 07:31:15,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 07:31:15,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:15,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 07:31:15,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1355, Unknown=2, NotChecked=76, Total=1640 [2022-12-14 07:31:15,192 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:31:16,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:16,305 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-12-14 07:31:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 07:31:16,306 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-12-14 07:31:16,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:16,306 INFO L225 Difference]: With dead ends: 61 [2022-12-14 07:31:16,307 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 07:31:16,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=264, Invalid=1718, Unknown=2, NotChecked=86, Total=2070 [2022-12-14 07:31:16,307 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:16,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 112 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 07:31:16,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 07:31:16,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-12-14 07:31:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 07:31:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-12-14 07:31:16,321 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 24 [2022-12-14 07:31:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:16,321 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-12-14 07:31:16,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:31:16,321 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-12-14 07:31:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 07:31:16,322 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:16,322 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:16,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 07:31:16,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:16,524 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:31:16,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:16,525 INFO L85 PathProgramCache]: Analyzing trace with hash -231650588, now seen corresponding path program 7 times [2022-12-14 07:31:16,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:16,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241147471] [2022-12-14 07:31:16,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:16,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:16,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:31:16,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125476756] [2022-12-14 07:31:16,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:31:16,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:16,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:31:16,539 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:31:16,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:31:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:31:16,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:31:16,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:31:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:31:16,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:31:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:31:16,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:16,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241147471] [2022-12-14 07:31:16,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:31:16,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125476756] [2022-12-14 07:31:16,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125476756] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:31:16,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2038736129] [2022-12-14 07:31:16,762 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:31:16,762 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:31:16,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:31:16,762 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:31:16,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:31:16,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:16,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:16,828 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:31:16,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:31:16,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:16,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:16,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 07:31:16,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:16,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:16,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:16,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-12-14 07:31:16,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:16,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:16,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:16,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:16,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:16,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:16,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:16,962 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 07:31:16,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-12-14 07:31:17,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:17,022 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:31:17,022 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:31:17,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:17,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:17,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:17,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:17,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:17,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:17,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:17,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:17,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:17,081 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:31:17,082 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 99 treesize of output 75 [2022-12-14 07:31:17,142 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:31:17,161 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:31:18,280 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2064#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:31:18,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:31:18,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:31:18,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-12-14 07:31:18,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024682694] [2022-12-14 07:31:18,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:31:18,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 07:31:18,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:18,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 07:31:18,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-12-14 07:31:18,282 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:31:18,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:18,516 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2022-12-14 07:31:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 07:31:18,516 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-12-14 07:31:18,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:18,517 INFO L225 Difference]: With dead ends: 81 [2022-12-14 07:31:18,517 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 07:31:18,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 07:31:18,517 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:18,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 92 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:31:18,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 07:31:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2022-12-14 07:31:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 07:31:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-12-14 07:31:18,533 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 25 [2022-12-14 07:31:18,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:18,533 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-12-14 07:31:18,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:31:18,533 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-12-14 07:31:18,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 07:31:18,534 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:18,534 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:18,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 07:31:18,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 07:31:18,735 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:31:18,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:18,736 INFO L85 PathProgramCache]: Analyzing trace with hash 739023101, now seen corresponding path program 8 times [2022-12-14 07:31:18,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:18,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607760124] [2022-12-14 07:31:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:18,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:18,778 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:31:18,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173591109] [2022-12-14 07:31:18,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:31:18,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:18,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:31:18,781 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:31:18,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 07:31:18,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 07:31:18,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:31:18,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:31:18,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:31:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:31:18,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:31:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:31:19,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:19,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607760124] [2022-12-14 07:31:19,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:31:19,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173591109] [2022-12-14 07:31:19,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173591109] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:31:19,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1256774464] [2022-12-14 07:31:19,050 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:31:19,050 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:31:19,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:31:19,050 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:31:19,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:31:19,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:19,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:19,119 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 07:31:19,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:31:19,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:19,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:19,188 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:31:19,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:31:19,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:19,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:19,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:19,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-12-14 07:31:19,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:19,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:19,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:19,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:19,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:19,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:19,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:19,303 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 07:31:19,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-12-14 07:31:19,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:19,363 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:31:19,363 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:31:19,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:19,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:19,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:19,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:19,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:19,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:19,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:19,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:19,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:19,412 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:31:19,413 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 99 treesize of output 75 [2022-12-14 07:31:19,459 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:31:19,475 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:31:20,270 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2476#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:31:20,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:31:20,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:31:20,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-12-14 07:31:20,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054984738] [2022-12-14 07:31:20,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:31:20,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 07:31:20,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:20,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 07:31:20,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-12-14 07:31:20,272 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:31:20,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:20,431 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-12-14 07:31:20,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 07:31:20,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-12-14 07:31:20,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:20,433 INFO L225 Difference]: With dead ends: 71 [2022-12-14 07:31:20,433 INFO L226 Difference]: Without dead ends: 68 [2022-12-14 07:31:20,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 07:31:20,434 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:20,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 153 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:31:20,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-14 07:31:20,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2022-12-14 07:31:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 07:31:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-12-14 07:31:20,450 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 25 [2022-12-14 07:31:20,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:20,450 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-12-14 07:31:20,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:31:20,450 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-12-14 07:31:20,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 07:31:20,450 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:20,450 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:20,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 07:31:20,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:20,652 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:31:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:20,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1434614408, now seen corresponding path program 9 times [2022-12-14 07:31:20,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:20,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189045690] [2022-12-14 07:31:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:20,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:20,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:31:20,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467759773] [2022-12-14 07:31:20,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:31:20,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:20,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:31:20,695 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:31:20,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 07:31:21,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:31:21,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:31:21,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 119 conjunts are in the unsatisfiable core [2022-12-14 07:31:21,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:31:21,044 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 10 treesize of output 8 [2022-12-14 07:31:21,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,068 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-12-14 07:31:21,071 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 44 [2022-12-14 07:31:21,074 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 19 treesize of output 16 [2022-12-14 07:31:21,080 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 21 treesize of output 19 [2022-12-14 07:31:21,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 41 [2022-12-14 07:31:21,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:21,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:21,193 INFO L321 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-12-14 07:31:21,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 71 [2022-12-14 07:31:21,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:21,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:21,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:21,274 INFO L321 Elim1Store]: treesize reduction 50, result has 27.5 percent of original size [2022-12-14 07:31:21,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 123 treesize of output 112 [2022-12-14 07:31:21,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:21,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:21,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:21,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:21,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:21,369 INFO L321 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2022-12-14 07:31:21,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 206 treesize of output 133 [2022-12-14 07:31:21,929 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 07:31:21,929 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 2 case distinctions, treesize of input 381 treesize of output 254 [2022-12-14 07:31:21,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 158 treesize of output 130 [2022-12-14 07:31:21,947 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-12-14 07:31:22,019 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-12-14 07:31:22,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 244 [2022-12-14 07:31:22,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,156 INFO L321 Elim1Store]: treesize reduction 231, result has 16.6 percent of original size [2022-12-14 07:31:22,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 117 treesize of output 216 [2022-12-14 07:31:22,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:22,274 INFO L321 Elim1Store]: treesize reduction 109, result has 31.9 percent of original size [2022-12-14 07:31:22,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 62 treesize of output 119 [2022-12-14 07:31:22,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 66 treesize of output 62 [2022-12-14 07:31:22,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 11 [2022-12-14 07:31:22,404 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 0 case distinctions, treesize of input 110 treesize of output 92 [2022-12-14 07:31:22,427 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-12-14 07:31:22,427 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 2 case distinctions, treesize of input 155 treesize of output 132 [2022-12-14 07:31:22,436 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 29 treesize of output 23 [2022-12-14 07:31:24,042 INFO L321 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2022-12-14 07:31:24,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 281 treesize of output 113 [2022-12-14 07:31:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:31:24,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:31:26,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:26,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189045690] [2022-12-14 07:31:26,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:31:26,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467759773] [2022-12-14 07:31:26,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467759773] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:31:26,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1825981715] [2022-12-14 07:31:26,983 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:31:26,983 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:31:26,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:31:26,983 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:31:26,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:31:27,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:27,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:27,054 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 07:31:27,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:31:27,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:27,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:27,111 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:31:27,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:31:27,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:27,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:27,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:27,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-12-14 07:31:27,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:27,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:27,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:27,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:27,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:27,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:27,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:27,235 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 07:31:27,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-12-14 07:31:27,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:27,294 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:31:27,294 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:31:27,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:27,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:27,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:27,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:27,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:27,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:27,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:27,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:27,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:27,346 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:31:27,346 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 99 treesize of output 75 [2022-12-14 07:31:27,401 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:31:27,417 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:31:29,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2844#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:31:29,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:31:29,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:31:29,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-12-14 07:31:29,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231274147] [2022-12-14 07:31:29,028 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 07:31:29,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 07:31:29,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:29,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 07:31:29,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1647, Unknown=8, NotChecked=0, Total=1892 [2022-12-14 07:31:29,029 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:31:30,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:30,583 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2022-12-14 07:31:30,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 07:31:30,584 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-12-14 07:31:30,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:30,584 INFO L225 Difference]: With dead ends: 79 [2022-12-14 07:31:30,584 INFO L226 Difference]: Without dead ends: 76 [2022-12-14 07:31:30,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=297, Invalid=2047, Unknown=8, NotChecked=0, Total=2352 [2022-12-14 07:31:30,585 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:30,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 151 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 07:31:30,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-14 07:31:30,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2022-12-14 07:31:30,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:31:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-12-14 07:31:30,605 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 26 [2022-12-14 07:31:30,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:30,606 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-12-14 07:31:30,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:31:30,606 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-12-14 07:31:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 07:31:30,607 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:30,607 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:30,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 07:31:30,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 07:31:30,808 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:31:30,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:30,809 INFO L85 PathProgramCache]: Analyzing trace with hash -2032349798, now seen corresponding path program 1 times [2022-12-14 07:31:30,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:30,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479030477] [2022-12-14 07:31:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:30,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:30,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:31:30,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545252182] [2022-12-14 07:31:30,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:30,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:30,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:31:30,825 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:31:30,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 07:31:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:31:30,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-14 07:31:30,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:31:30,998 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 10 treesize of output 8 [2022-12-14 07:31:31,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:31,018 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-12-14 07:31:31,021 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-12-14 07:31:31,023 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 8 treesize of output 7 [2022-12-14 07:31:31,027 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 8 treesize of output 7 [2022-12-14 07:31:31,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:31,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:31,055 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 52 treesize of output 41 [2022-12-14 07:31:31,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:31,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:31,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:31,096 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 57 treesize of output 53 [2022-12-14 07:31:31,373 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 07:31:31,373 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 2 case distinctions, treesize of input 330 treesize of output 213 [2022-12-14 07:31:31,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 158 treesize of output 130 [2022-12-14 07:31:31,388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-12-14 07:31:31,415 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-12-14 07:31:31,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 217 [2022-12-14 07:31:31,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:31,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:31,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:31,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:31,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:31,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:31,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:31,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2022-12-14 07:31:31,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:31,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:31,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:31,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:31,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:31,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:31,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 124 [2022-12-14 07:31:31,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:31,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:31,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:31,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 234 treesize of output 206 [2022-12-14 07:31:31,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 60 [2022-12-14 07:31:31,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 11 [2022-12-14 07:31:31,959 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 07:31:31,959 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 2 case distinctions, treesize of input 399 treesize of output 272 [2022-12-14 07:31:31,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 158 treesize of output 130 [2022-12-14 07:31:31,974 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-12-14 07:31:32,017 INFO L321 Elim1Store]: treesize reduction 111, result has 8.3 percent of original size [2022-12-14 07:31:32,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 205 treesize of output 248 [2022-12-14 07:31:32,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:32,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:32,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:32,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:32,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:32,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:32,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:32,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 49 [2022-12-14 07:31:32,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:32,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:32,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:32,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:32,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:32,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:32,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 131 [2022-12-14 07:31:32,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 66 treesize of output 60 [2022-12-14 07:31:32,107 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 75 [2022-12-14 07:31:32,113 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 24 treesize of output 18 [2022-12-14 07:31:32,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:32,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:32,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:32,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:32,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:32,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:32,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:32,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:32,546 INFO L321 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2022-12-14 07:31:32,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 140 treesize of output 56 [2022-12-14 07:31:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:31:32,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:31:32,787 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_854 (Array Int Int)) (v_ArrVal_849 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse0 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_854) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_849) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4)) (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3))))))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)))))) 0)) is different from false [2022-12-14 07:31:33,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:33,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479030477] [2022-12-14 07:31:33,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:31:33,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545252182] [2022-12-14 07:31:33,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545252182] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:31:33,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [21307572] [2022-12-14 07:31:33,018 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:31:33,018 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:31:33,018 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:31:33,018 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:31:33,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:31:33,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,095 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 07:31:33,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:31:33,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,162 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:31:33,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:31:33,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:33,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-12-14 07:31:33,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:33,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:33,277 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 07:31:33,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-12-14 07:31:33,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:33,350 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:31:33,350 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:31:33,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:33,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:33,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:33,401 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:31:33,401 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 99 treesize of output 75 [2022-12-14 07:31:33,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:33,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:33,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:33,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:33,459 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:31:33,459 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 99 treesize of output 75 [2022-12-14 07:31:33,520 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:31:33,534 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:31:35,003 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3239#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:31:35,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:31:35,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:31:35,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-12-14 07:31:35,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737361827] [2022-12-14 07:31:35,003 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 07:31:35,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 07:31:35,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:35,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 07:31:35,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1476, Unknown=2, NotChecked=78, Total=1722 [2022-12-14 07:31:35,004 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:31:36,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:36,271 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-12-14 07:31:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 07:31:36,272 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-12-14 07:31:36,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:36,272 INFO L225 Difference]: With dead ends: 75 [2022-12-14 07:31:36,272 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 07:31:36,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=277, Invalid=2175, Unknown=2, NotChecked=96, Total=2550 [2022-12-14 07:31:36,273 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:36,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 121 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:31:36,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 07:31:36,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-12-14 07:31:36,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 07:31:36,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-12-14 07:31:36,292 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 28 [2022-12-14 07:31:36,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:36,292 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-12-14 07:31:36,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:31:36,292 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-12-14 07:31:36,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 07:31:36,293 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:36,293 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:36,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 07:31:36,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 07:31:36,494 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:31:36,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:36,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1523108445, now seen corresponding path program 10 times [2022-12-14 07:31:36,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:36,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774494947] [2022-12-14 07:31:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:36,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:36,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:31:36,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452846963] [2022-12-14 07:31:36,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:31:36,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:36,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:31:36,534 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:31:36,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 07:31:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:31:36,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:31:36,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:31:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:31:36,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:31:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:31:36,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:36,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774494947] [2022-12-14 07:31:36,777 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:31:36,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452846963] [2022-12-14 07:31:36,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452846963] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:31:36,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1596038184] [2022-12-14 07:31:36,778 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:31:36,778 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:31:36,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:31:36,778 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:31:36,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:31:36,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:36,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:36,849 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 07:31:36,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:31:36,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:36,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:36,910 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:31:36,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:31:36,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:36,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:36,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:36,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-12-14 07:31:36,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:36,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:36,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:36,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:36,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:36,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:36,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:37,019 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 07:31:37,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-12-14 07:31:37,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:37,088 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:31:37,088 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:31:37,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:37,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:37,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:37,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:37,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:37,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:37,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:37,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:37,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:37,148 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:31:37,148 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 99 treesize of output 75 [2022-12-14 07:31:37,201 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:31:37,217 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:31:38,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3653#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:31:38,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:31:38,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:31:38,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-12-14 07:31:38,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832059055] [2022-12-14 07:31:38,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:31:38,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 07:31:38,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:38,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 07:31:38,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 07:31:38,155 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:31:38,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:38,462 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2022-12-14 07:31:38,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 07:31:38,462 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-12-14 07:31:38,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:38,463 INFO L225 Difference]: With dead ends: 86 [2022-12-14 07:31:38,463 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 07:31:38,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 07:31:38,465 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 71 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:38,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 103 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:31:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 07:31:38,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2022-12-14 07:31:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 07:31:38,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-12-14 07:31:38,485 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 27 [2022-12-14 07:31:38,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:38,485 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-12-14 07:31:38,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:31:38,486 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-12-14 07:31:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 07:31:38,486 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:38,486 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:38,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 07:31:38,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:38,687 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:31:38,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:38,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1549221732, now seen corresponding path program 11 times [2022-12-14 07:31:38,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:38,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160779703] [2022-12-14 07:31:38,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:38,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:38,727 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:31:38,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269834422] [2022-12-14 07:31:38,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:31:38,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:38,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:31:38,730 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:31:38,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 07:31:38,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 07:31:38,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:31:38,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:31:38,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:31:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:31:38,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:31:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:31:39,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:39,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160779703] [2022-12-14 07:31:39,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:31:39,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269834422] [2022-12-14 07:31:39,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269834422] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:31:39,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1905160270] [2022-12-14 07:31:39,073 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:31:39,073 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:31:39,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:31:39,074 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:31:39,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:31:39,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:39,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:39,140 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 07:31:39,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:31:39,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:39,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:39,203 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:31:39,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:31:39,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:39,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:39,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:39,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-12-14 07:31:39,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:39,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:39,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:39,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:39,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:39,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:39,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:39,314 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 07:31:39,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-12-14 07:31:39,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:39,385 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:31:39,385 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:31:39,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:39,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:39,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:39,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:39,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:39,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:39,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:39,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:39,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:39,438 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:31:39,438 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 99 treesize of output 75 [2022-12-14 07:31:39,487 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:31:39,501 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:31:40,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4100#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:31:40,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:31:40,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:31:40,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-12-14 07:31:40,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715979169] [2022-12-14 07:31:40,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:31:40,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 07:31:40,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:40,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 07:31:40,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 07:31:40,308 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:31:40,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:40,477 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2022-12-14 07:31:40,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 07:31:40,477 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-12-14 07:31:40,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:40,478 INFO L225 Difference]: With dead ends: 75 [2022-12-14 07:31:40,478 INFO L226 Difference]: Without dead ends: 72 [2022-12-14 07:31:40,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 07:31:40,479 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:40,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 78 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:31:40,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-14 07:31:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2022-12-14 07:31:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 07:31:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2022-12-14 07:31:40,499 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 27 [2022-12-14 07:31:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:40,499 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2022-12-14 07:31:40,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:31:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2022-12-14 07:31:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 07:31:40,499 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:40,499 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:40,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 07:31:40,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 07:31:40,701 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:31:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:40,702 INFO L85 PathProgramCache]: Analyzing trace with hash 780968193, now seen corresponding path program 12 times [2022-12-14 07:31:40,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:40,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905501519] [2022-12-14 07:31:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:40,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:40,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:31:40,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740861386] [2022-12-14 07:31:40,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:31:40,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:40,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:31:40,738 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:31:40,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 07:31:41,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:31:41,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:31:41,129 WARN L261 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 139 conjunts are in the unsatisfiable core [2022-12-14 07:31:41,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:31:41,152 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 10 treesize of output 8 [2022-12-14 07:31:41,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,180 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-12-14 07:31:41,184 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-12-14 07:31:41,187 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 07:31:41,193 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 8 treesize of output 7 [2022-12-14 07:31:41,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 79 treesize of output 56 [2022-12-14 07:31:41,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:41,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:41,312 INFO L321 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-12-14 07:31:41,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 71 [2022-12-14 07:31:41,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:41,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:41,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:41,419 INFO L321 Elim1Store]: treesize reduction 50, result has 27.5 percent of original size [2022-12-14 07:31:41,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 123 treesize of output 112 [2022-12-14 07:31:41,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:41,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:41,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:41,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:41,530 INFO L321 Elim1Store]: treesize reduction 58, result has 24.7 percent of original size [2022-12-14 07:31:41,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 162 treesize of output 157 [2022-12-14 07:31:41,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:41,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:41,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:41,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:41,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:41,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:41,675 INFO L321 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2022-12-14 07:31:41,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 46 case distinctions, treesize of input 248 treesize of output 163 [2022-12-14 07:31:42,482 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 07:31:42,482 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 2 case distinctions, treesize of input 401 treesize of output 270 [2022-12-14 07:31:42,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 158 treesize of output 130 [2022-12-14 07:31:42,502 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-12-14 07:31:42,544 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-12-14 07:31:42,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 218 treesize of output 253 [2022-12-14 07:31:42,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,708 INFO L321 Elim1Store]: treesize reduction 152, result has 28.6 percent of original size [2022-12-14 07:31:42,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 69 treesize of output 132 [2022-12-14 07:31:42,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,857 INFO L321 Elim1Store]: treesize reduction 308, result has 16.5 percent of original size [2022-12-14 07:31:42,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 126 treesize of output 236 [2022-12-14 07:31:42,971 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 0 case distinctions, treesize of input 148 treesize of output 124 [2022-12-14 07:31:42,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:42,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:43,069 INFO L321 Elim1Store]: treesize reduction 102, result has 42.7 percent of original size [2022-12-14 07:31:43,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 124 treesize of output 176 [2022-12-14 07:31:43,135 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-12-14 07:31:43,136 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 2 case distinctions, treesize of input 155 treesize of output 128 [2022-12-14 07:31:46,056 INFO L321 Elim1Store]: treesize reduction 45, result has 8.2 percent of original size [2022-12-14 07:31:46,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 406 treesize of output 166 [2022-12-14 07:31:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:31:46,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:31:46,702 WARN L837 $PredicateComparison]: unable to prove that (or (not (< 5 c_~ARR_SIZE~0)) (forall ((v_ArrVal_1180 (Array Int Int)) (v_ArrVal_1182 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse1 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_1182) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_1180) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4)) (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3))))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 20)) (select .cse1 (+ 16 |c_ULTIMATE.start_main_~#array2~0#1.offset|)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 20)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 16)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)))))) 0))) is different from false [2022-12-14 07:31:46,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:46,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905501519] [2022-12-14 07:31:46,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:31:46,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740861386] [2022-12-14 07:31:46,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740861386] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:31:46,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97228947] [2022-12-14 07:31:46,918 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:31:46,918 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:31:46,918 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:31:46,918 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:31:46,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:31:46,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:46,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:46,990 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 07:31:46,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:31:47,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:47,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:47,056 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:31:47,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:31:47,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:47,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:47,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:47,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-12-14 07:31:47,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:47,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:47,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:47,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:47,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:47,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:47,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:47,190 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 07:31:47,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-12-14 07:31:47,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:47,258 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:31:47,259 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:31:47,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:47,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:47,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:47,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:47,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:47,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:47,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:47,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:47,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:47,311 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:31:47,311 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 99 treesize of output 75 [2022-12-14 07:31:47,361 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:31:47,376 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:31:49,071 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4496#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:31:49,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:31:49,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:31:49,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-12-14 07:31:49,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115686789] [2022-12-14 07:31:49,071 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 07:31:49,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 07:31:49,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:49,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 07:31:49,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1803, Unknown=4, NotChecked=88, Total=2162 [2022-12-14 07:31:49,072 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:31:50,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:50,991 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2022-12-14 07:31:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 07:31:50,992 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-12-14 07:31:50,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:50,993 INFO L225 Difference]: With dead ends: 83 [2022-12-14 07:31:50,993 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 07:31:50,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=328, Invalid=2222, Unknown=4, NotChecked=98, Total=2652 [2022-12-14 07:31:50,994 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:50,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 152 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 07:31:50,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 07:31:51,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2022-12-14 07:31:51,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 55 states have internal predecessors, (64), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:31:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2022-12-14 07:31:51,025 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 28 [2022-12-14 07:31:51,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:51,026 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2022-12-14 07:31:51,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:31:51,026 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2022-12-14 07:31:51,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 07:31:51,026 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:51,026 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:51,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 07:31:51,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 07:31:51,228 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:31:51,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:51,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1189189423, now seen corresponding path program 2 times [2022-12-14 07:31:51,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:51,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119956674] [2022-12-14 07:31:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:51,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:51,265 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:31:51,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078168881] [2022-12-14 07:31:51,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:31:51,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:51,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:31:51,270 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:31:51,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 07:31:51,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 07:31:51,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:31:51,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 121 conjunts are in the unsatisfiable core [2022-12-14 07:31:51,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:31:51,695 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 10 treesize of output 8 [2022-12-14 07:31:51,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:51,721 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-12-14 07:31:51,723 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 44 [2022-12-14 07:31:51,726 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 21 treesize of output 19 [2022-12-14 07:31:51,731 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 19 treesize of output 16 [2022-12-14 07:31:51,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:51,762 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 82 [2022-12-14 07:31:51,769 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 41 treesize of output 44 [2022-12-14 07:31:51,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 84 [2022-12-14 07:31:51,845 INFO L321 Elim1Store]: treesize reduction 39, result has 11.4 percent of original size [2022-12-14 07:31:51,846 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 2 case distinctions, treesize of input 173 treesize of output 147 [2022-12-14 07:31:51,852 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 0 case distinctions, treesize of input 52 treesize of output 53 [2022-12-14 07:31:51,885 INFO L321 Elim1Store]: treesize reduction 56, result has 8.2 percent of original size [2022-12-14 07:31:51,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 105 [2022-12-14 07:31:51,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 60 treesize of output 68 [2022-12-14 07:31:51,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 59 [2022-12-14 07:31:51,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:51,979 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 102 [2022-12-14 07:31:51,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:51,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:51,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:51,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:51,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:51,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:51,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 60 [2022-12-14 07:31:52,022 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 14 treesize of output 7 [2022-12-14 07:31:52,152 INFO L321 Elim1Store]: treesize reduction 33, result has 13.2 percent of original size [2022-12-14 07:31:52,152 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 2 case distinctions, treesize of input 163 treesize of output 139 [2022-12-14 07:31:52,159 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 0 case distinctions, treesize of input 48 treesize of output 49 [2022-12-14 07:31:52,183 INFO L321 Elim1Store]: treesize reduction 54, result has 8.5 percent of original size [2022-12-14 07:31:52,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 101 [2022-12-14 07:31:52,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 66 [2022-12-14 07:31:52,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 66 [2022-12-14 07:31:52,279 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 0 case distinctions, treesize of input 23 treesize of output 12 [2022-12-14 07:31:52,282 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 12 treesize of output 5 [2022-12-14 07:31:52,703 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 07:31:52,703 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 2 case distinctions, treesize of input 361 treesize of output 238 [2022-12-14 07:31:52,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 158 treesize of output 130 [2022-12-14 07:31:52,718 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-12-14 07:31:52,798 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-12-14 07:31:52,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 196 treesize of output 235 [2022-12-14 07:31:52,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,881 INFO L321 Elim1Store]: treesize reduction 154, result has 16.8 percent of original size [2022-12-14 07:31:52,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 196 [2022-12-14 07:31:52,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:52,957 INFO L321 Elim1Store]: treesize reduction 76, result has 29.0 percent of original size [2022-12-14 07:31:52,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 96 [2022-12-14 07:31:52,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 66 treesize of output 62 [2022-12-14 07:31:52,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 11 [2022-12-14 07:31:53,042 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 07:31:53,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 228 treesize of output 197 [2022-12-14 07:31:53,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:53,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:53,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:53,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:53,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:53,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:53,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:53,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:53,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:53,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:53,120 INFO L321 Elim1Store]: treesize reduction 69, result has 27.4 percent of original size [2022-12-14 07:31:53,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 110 [2022-12-14 07:31:54,142 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 07:31:54,142 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 650 treesize of output 493 [2022-12-14 07:31:54,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 158 treesize of output 130 [2022-12-14 07:31:54,172 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-12-14 07:31:54,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,305 INFO L321 Elim1Store]: treesize reduction 76, result has 29.0 percent of original size [2022-12-14 07:31:54,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 350 treesize of output 363 [2022-12-14 07:31:54,341 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-12-14 07:31:54,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 516 treesize of output 517 [2022-12-14 07:31:54,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:54,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 287 treesize of output 261 [2022-12-14 07:31:54,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,454 INFO L321 Elim1Store]: treesize reduction 154, result has 16.8 percent of original size [2022-12-14 07:31:54,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 351 treesize of output 405 [2022-12-14 07:31:54,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:54,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:54,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 211 [2022-12-14 07:31:55,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 66 treesize of output 60 [2022-12-14 07:31:55,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:55,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:55,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:55,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:55,644 INFO L321 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-12-14 07:31:55,644 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 1 case distinctions, treesize of input 175 treesize of output 170 [2022-12-14 07:31:55,724 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 0 case distinctions, treesize of input 40 treesize of output 29 [2022-12-14 07:31:55,730 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 29 treesize of output 23 [2022-12-14 07:31:57,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:57,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:31:57,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:57,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:59,220 INFO L321 Elim1Store]: treesize reduction 1658, result has 24.6 percent of original size [2022-12-14 07:31:59,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 22 select indices, 22 select index equivalence classes, 6 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 231 case distinctions, treesize of input 275 treesize of output 631 [2022-12-14 07:32:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:32:10,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:32:11,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:11,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119956674] [2022-12-14 07:32:11,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:32:11,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078168881] [2022-12-14 07:32:11,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078168881] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:32:11,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [766026676] [2022-12-14 07:32:11,993 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:32:11,993 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:32:11,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:32:11,993 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:32:11,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:32:12,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,060 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:32:12,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:32:12,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 07:32:12,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:12,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-12-14 07:32:12,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:12,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:12,186 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 07:32:12,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-12-14 07:32:12,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:12,248 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:32:12,248 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:32:12,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:12,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:12,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:12,286 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:32:12,286 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 99 treesize of output 75 [2022-12-14 07:32:12,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:12,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:12,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:12,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:12,353 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:32:12,354 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 99 treesize of output 75 [2022-12-14 07:32:12,413 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:32:12,425 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:32:14,266 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4916#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:32:14,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:32:14,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:32:14,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-12-14 07:32:14,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379132959] [2022-12-14 07:32:14,266 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 07:32:14,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 07:32:14,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:14,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 07:32:14,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1659, Unknown=1, NotChecked=0, Total=1892 [2022-12-14 07:32:14,268 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 22 states, 20 states have (on average 1.2) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:32:16,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:16,322 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2022-12-14 07:32:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 07:32:16,323 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.2) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2022-12-14 07:32:16,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:16,323 INFO L225 Difference]: With dead ends: 88 [2022-12-14 07:32:16,323 INFO L226 Difference]: Without dead ends: 79 [2022-12-14 07:32:16,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=317, Invalid=2132, Unknown=1, NotChecked=0, Total=2450 [2022-12-14 07:32:16,324 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:16,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 159 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 331 Invalid, 1 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 07:32:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-14 07:32:16,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2022-12-14 07:32:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 07:32:16,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2022-12-14 07:32:16,361 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 30 [2022-12-14 07:32:16,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:16,361 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2022-12-14 07:32:16,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.2) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:32:16,361 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2022-12-14 07:32:16,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 07:32:16,362 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:16,362 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:16,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 07:32:16,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 07:32:16,563 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:16,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:16,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1560055036, now seen corresponding path program 13 times [2022-12-14 07:32:16,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:16,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817280031] [2022-12-14 07:32:16,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:16,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:16,607 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:32:16,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052515979] [2022-12-14 07:32:16,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:32:16,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:32:16,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:32:16,609 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:32:16,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 07:32:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:16,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 07:32:16,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:32:16,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:32:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:32:16,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:16,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817280031] [2022-12-14 07:32:16,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:32:16,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052515979] [2022-12-14 07:32:16,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052515979] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:32:16,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1879927997] [2022-12-14 07:32:16,946 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:32:16,946 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:32:16,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:32:16,947 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:32:16,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:32:16,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:16,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:17,026 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 07:32:17,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:32:17,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:17,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:17,096 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:32:17,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:32:17,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:17,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:17,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:17,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-12-14 07:32:17,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:17,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:17,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:17,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:17,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:17,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:17,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:17,219 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 07:32:17,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-12-14 07:32:17,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:17,292 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:32:17,293 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:32:17,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:17,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:17,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:17,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:17,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:17,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:17,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:17,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:17,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:17,358 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:32:17,358 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 99 treesize of output 75 [2022-12-14 07:32:17,421 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:32:17,437 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:32:18,789 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5394#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:32:18,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:32:18,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:32:18,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-12-14 07:32:18,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766815074] [2022-12-14 07:32:18,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:32:18,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 07:32:18,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:18,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 07:32:18,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 07:32:18,791 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:32:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:19,380 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2022-12-14 07:32:19,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 07:32:19,380 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-12-14 07:32:19,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:19,381 INFO L225 Difference]: With dead ends: 118 [2022-12-14 07:32:19,381 INFO L226 Difference]: Without dead ends: 106 [2022-12-14 07:32:19,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=578, Invalid=2728, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 07:32:19,382 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 108 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:19,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 98 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:32:19,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-14 07:32:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 82. [2022-12-14 07:32:19,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 07:32:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2022-12-14 07:32:19,416 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 29 [2022-12-14 07:32:19,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:19,416 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2022-12-14 07:32:19,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:32:19,416 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2022-12-14 07:32:19,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 07:32:19,416 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:19,417 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:19,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 07:32:19,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 07:32:19,618 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:19,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:19,618 INFO L85 PathProgramCache]: Analyzing trace with hash -750543139, now seen corresponding path program 14 times [2022-12-14 07:32:19,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:19,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282760107] [2022-12-14 07:32:19,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:19,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:19,659 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:32:19,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977244645] [2022-12-14 07:32:19,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:32:19,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:32:19,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:32:19,662 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:32:19,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 07:32:19,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 07:32:19,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:32:19,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 07:32:19,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:32:20,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:32:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:32:20,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:20,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282760107] [2022-12-14 07:32:20,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:32:20,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977244645] [2022-12-14 07:32:20,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977244645] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:32:20,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [709500044] [2022-12-14 07:32:20,231 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:32:20,231 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:32:20,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:32:20,231 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:32:20,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:32:20,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:20,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:20,314 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:32:20,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:32:20,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:20,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:20,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 07:32:20,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:20,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:20,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:20,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-12-14 07:32:20,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:20,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:20,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:20,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:20,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:20,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:20,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:20,453 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 07:32:20,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-12-14 07:32:20,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:20,516 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:32:20,516 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:32:20,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:20,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:20,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:20,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:20,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:20,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:20,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:20,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:20,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:20,580 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:32:20,581 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 99 treesize of output 75 [2022-12-14 07:32:20,639 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:32:20,656 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:32:21,845 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5957#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:32:21,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:32:21,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:32:21,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-12-14 07:32:21,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163877954] [2022-12-14 07:32:21,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:32:21,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 07:32:21,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:21,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 07:32:21,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 07:32:21,847 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:32:22,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:22,104 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2022-12-14 07:32:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 07:32:22,105 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-12-14 07:32:22,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:22,105 INFO L225 Difference]: With dead ends: 106 [2022-12-14 07:32:22,105 INFO L226 Difference]: Without dead ends: 103 [2022-12-14 07:32:22,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 07:32:22,106 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:22,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 135 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:32:22,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-12-14 07:32:22,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2022-12-14 07:32:22,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 07:32:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-12-14 07:32:22,143 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 29 [2022-12-14 07:32:22,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:22,143 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-12-14 07:32:22,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:32:22,143 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-12-14 07:32:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 07:32:22,144 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:22,144 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:22,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 07:32:22,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:32:22,344 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:22,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:22,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1792266072, now seen corresponding path program 15 times [2022-12-14 07:32:22,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:22,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484454439] [2022-12-14 07:32:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:22,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:22,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:32:22,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313049066] [2022-12-14 07:32:22,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:32:22,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:32:22,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:32:22,354 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:32:22,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 07:32:22,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:32:22,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:32:22,877 WARN L261 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 151 conjunts are in the unsatisfiable core [2022-12-14 07:32:22,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:22,900 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 10 treesize of output 8 [2022-12-14 07:32:22,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:22,922 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-12-14 07:32:22,925 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-12-14 07:32:22,928 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 8 treesize of output 7 [2022-12-14 07:32:22,932 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 8 treesize of output 7 [2022-12-14 07:32:22,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:22,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:22,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:22,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 41 [2022-12-14 07:32:23,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,014 INFO L321 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-12-14 07:32:23,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 71 [2022-12-14 07:32:23,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,087 INFO L321 Elim1Store]: treesize reduction 45, result has 22.4 percent of original size [2022-12-14 07:32:23,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 102 treesize of output 101 [2022-12-14 07:32:23,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,178 INFO L321 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2022-12-14 07:32:23,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 126 treesize of output 131 [2022-12-14 07:32:23,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,318 INFO L321 Elim1Store]: treesize reduction 66, result has 22.4 percent of original size [2022-12-14 07:32:23,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 46 case distinctions, treesize of input 171 treesize of output 172 [2022-12-14 07:32:23,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:23,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:23,470 INFO L321 Elim1Store]: treesize reduction 69, result has 15.9 percent of original size [2022-12-14 07:32:23,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 67 case distinctions, treesize of input 290 treesize of output 193 [2022-12-14 07:32:24,192 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 07:32:24,192 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 2 case distinctions, treesize of input 421 treesize of output 286 [2022-12-14 07:32:24,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 158 treesize of output 130 [2022-12-14 07:32:24,211 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-12-14 07:32:24,302 INFO L321 Elim1Store]: treesize reduction 111, result has 8.3 percent of original size [2022-12-14 07:32:24,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 229 treesize of output 266 [2022-12-14 07:32:24,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,538 INFO L321 Elim1Store]: treesize reduction 385, result has 16.5 percent of original size [2022-12-14 07:32:24,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 9 select indices, 9 select index equivalence classes, 30 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 135 treesize of output 256 [2022-12-14 07:32:24,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,705 INFO L321 Elim1Store]: treesize reduction 190, result has 28.6 percent of original size [2022-12-14 07:32:24,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 30 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 150 [2022-12-14 07:32:24,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 58 [2022-12-14 07:32:24,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:24,903 INFO L321 Elim1Store]: treesize reduction 142, result has 34.9 percent of original size [2022-12-14 07:32:24,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 124 treesize of output 181 [2022-12-14 07:32:31,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:31,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 22 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 624 treesize of output 260 [2022-12-14 07:32:31,287 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 15 treesize of output 11 [2022-12-14 07:32:31,292 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 15 treesize of output 11 [2022-12-14 07:32:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:32:31,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:32:32,361 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1679 (Array Int Int)) (v_ArrVal_1681 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse0 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_1681) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_1679) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3)) (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4))))))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse0 (+ 16 |c_ULTIMATE.start_main_~#array2~0#1.offset|)) (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 20)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 20)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 24)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 16)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 24)))))) 0)) (not (< 6 c_~ARR_SIZE~0))) is different from false [2022-12-14 07:32:32,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:32,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484454439] [2022-12-14 07:32:32,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:32:32,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313049066] [2022-12-14 07:32:32,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313049066] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:32:32,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1249653856] [2022-12-14 07:32:32,711 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:32:32,711 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:32:32,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:32:32,712 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:32:32,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:32:32,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:32,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:32,781 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 07:32:32,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:32:32,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:32,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:32,834 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:32:32,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:32:32,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:32,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:32,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:32,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-12-14 07:32:32,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:32,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:32,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:32,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:32,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:32,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:32,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:32,944 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 07:32:32,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-12-14 07:32:32,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:33,018 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:32:33,018 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:32:33,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:33,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:33,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:33,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:33,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:33,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:33,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:33,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:33,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:33,073 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:32:33,073 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 99 treesize of output 75 [2022-12-14 07:32:33,123 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:32:33,136 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:32:35,166 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6450#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:32:35,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:32:35,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:32:35,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-12-14 07:32:35,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369620117] [2022-12-14 07:32:35,167 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 07:32:35,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 07:32:35,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:35,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 07:32:35,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2051, Unknown=5, NotChecked=94, Total=2450 [2022-12-14 07:32:35,168 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 26 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:32:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:39,040 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2022-12-14 07:32:39,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 07:32:39,041 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-12-14 07:32:39,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:39,042 INFO L225 Difference]: With dead ends: 107 [2022-12-14 07:32:39,042 INFO L226 Difference]: Without dead ends: 104 [2022-12-14 07:32:39,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=363, Invalid=2498, Unknown=5, NotChecked=104, Total=2970 [2022-12-14 07:32:39,043 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:39,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 241 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 07:32:39,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-14 07:32:39,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2022-12-14 07:32:39,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:32:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2022-12-14 07:32:39,092 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 30 [2022-12-14 07:32:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:39,092 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2022-12-14 07:32:39,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:32:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2022-12-14 07:32:39,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 07:32:39,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:39,092 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:39,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 07:32:39,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:32:39,294 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:32:39,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:39,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1606604998, now seen corresponding path program 3 times [2022-12-14 07:32:39,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:39,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739913516] [2022-12-14 07:32:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:39,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:39,335 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:32:39,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363053536] [2022-12-14 07:32:39,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:32:39,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:32:39,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:32:39,339 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:32:39,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 07:32:39,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:32:39,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:32:39,934 WARN L261 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 138 conjunts are in the unsatisfiable core [2022-12-14 07:32:39,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:39,957 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 10 treesize of output 8 [2022-12-14 07:32:39,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:39,985 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-12-14 07:32:39,989 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 8 treesize of output 7 [2022-12-14 07:32:39,992 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 19 treesize of output 18 [2022-12-14 07:32:40,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 79 treesize of output 56 [2022-12-14 07:32:40,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:40,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:40,116 INFO L321 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-12-14 07:32:40,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 71 [2022-12-14 07:32:40,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:40,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:40,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:40,204 INFO L321 Elim1Store]: treesize reduction 45, result has 22.4 percent of original size [2022-12-14 07:32:40,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 102 treesize of output 101 [2022-12-14 07:32:40,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:40,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:40,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:40,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:40,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:32:40,344 INFO L321 Elim1Store]: treesize reduction 58, result has 24.7 percent of original size [2022-12-14 07:32:40,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 257 treesize of output 144 [2022-12-14 07:32:41,226 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 07:32:41,226 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 2 case distinctions, treesize of input 461 treesize of output 312 [2022-12-14 07:32:41,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 158 treesize of output 130 [2022-12-14 07:32:41,248 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-12-14 07:32:41,341 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-12-14 07:32:41,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 315 treesize of output 330 [2022-12-14 07:32:41,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,448 INFO L321 Elim1Store]: treesize reduction 231, result has 16.6 percent of original size [2022-12-14 07:32:41,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 203 treesize of output 258 [2022-12-14 07:32:41,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:41,560 INFO L321 Elim1Store]: treesize reduction 114, result has 28.7 percent of original size [2022-12-14 07:32:41,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 62 treesize of output 114 [2022-12-14 07:32:41,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 66 treesize of output 62 [2022-12-14 07:32:41,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 11 [2022-12-14 07:32:42,076 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-12-14 07:32:42,077 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 2 case distinctions, treesize of input 1169 treesize of output 1086 [2022-12-14 07:32:42,088 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 13 treesize of output 9 [2022-12-14 07:32:42,146 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 13 treesize of output 9 [2022-12-14 07:32:42,222 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 13 treesize of output 9 [2022-12-14 07:32:42,309 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 13 treesize of output 9 [2022-12-14 07:32:42,335 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 13 treesize of output 9 [2022-12-14 07:32:43,947 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 07:32:43,947 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 2 case distinctions, treesize of input 644 treesize of output 455 [2022-12-14 07:32:43,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 158 treesize of output 130 [2022-12-14 07:32:43,972 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-12-14 07:32:44,045 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-12-14 07:32:44,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 471 treesize of output 478 [2022-12-14 07:32:44,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,190 INFO L321 Elim1Store]: treesize reduction 231, result has 16.6 percent of original size [2022-12-14 07:32:44,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 351 treesize of output 396 [2022-12-14 07:32:44,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:44,332 INFO L321 Elim1Store]: treesize reduction 109, result has 31.9 percent of original size [2022-12-14 07:32:44,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 272 treesize of output 271 [2022-12-14 07:32:55,257 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 07:32:55,257 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 1637 treesize of output 1377 [2022-12-14 07:32:55,444 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:32:55,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 1377 treesize of output 1385 [2022-12-14 07:32:55,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:32:55,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 1576 treesize of output 1458 [2022-12-14 07:32:55,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:32:55,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 1245 treesize of output 1340 [2022-12-14 07:32:55,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 1217 treesize of output 1199 [2022-12-14 07:32:55,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 1199 treesize of output 1183 [2022-12-14 07:32:55,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 1183 treesize of output 1165 [2022-12-14 07:32:55,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 1165 treesize of output 1147 [2022-12-14 07:32:55,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 1147 treesize of output 1131 [2022-12-14 07:32:55,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 1131 treesize of output 1113 [2022-12-14 07:32:56,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 1113 treesize of output 1093 [2022-12-14 07:33:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:33:06,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:33:06,854 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1828 (Array Int Int)) (v_ArrVal_1827 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse1 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_1828) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_1827) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4)) (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3))))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 16)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ 16 |c_ULTIMATE.start_main_~#array2~0#1.offset|)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))) 0)) (not (< 4 c_~ARR_SIZE~0))) is different from false [2022-12-14 07:33:09,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:33:09,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739913516] [2022-12-14 07:33:09,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:33:09,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363053536] [2022-12-14 07:33:09,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363053536] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:33:09,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1016148125] [2022-12-14 07:33:09,180 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:33:09,180 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:33:09,180 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:33:09,180 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:33:09,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:33:09,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,260 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 07:33:09,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:33:09,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,325 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:33:09,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:33:09,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 07:33:09,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:09,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:09,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:09,515 INFO L321 Elim1Store]: treesize reduction 272, result has 16.3 percent of original size [2022-12-14 07:33:09,515 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 9 case distinctions, treesize of input 371 treesize of output 364 [2022-12-14 07:33:09,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:09,624 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:33:09,625 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:33:09,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:09,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:09,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:09,666 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:33:09,666 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 99 treesize of output 75 [2022-12-14 07:33:09,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:09,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:09,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:09,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:09,713 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:33:09,714 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 99 treesize of output 75 [2022-12-14 07:33:09,760 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:33:09,773 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:33:12,024 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6955#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:33:12,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:33:12,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:33:12,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-12-14 07:33:12,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903327133] [2022-12-14 07:33:12,025 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 07:33:12,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 07:33:12,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:33:12,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 07:33:12,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1902, Unknown=3, NotChecked=90, Total=2256 [2022-12-14 07:33:12,026 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 26 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:33:15,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:33:15,305 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2022-12-14 07:33:15,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 07:33:15,305 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-12-14 07:33:15,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:33:15,305 INFO L225 Difference]: With dead ends: 114 [2022-12-14 07:33:15,306 INFO L226 Difference]: Without dead ends: 104 [2022-12-14 07:33:15,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=333, Invalid=2320, Unknown=3, NotChecked=100, Total=2756 [2022-12-14 07:33:15,307 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:33:15,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 153 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 07:33:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-14 07:33:15,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2022-12-14 07:33:15,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 75 states have internal predecessors, (86), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 07:33:15,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2022-12-14 07:33:15,405 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 32 [2022-12-14 07:33:15,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:33:15,405 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2022-12-14 07:33:15,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:33:15,405 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2022-12-14 07:33:15,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 07:33:15,405 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:33:15,406 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:33:15,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 07:33:15,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:33:15,606 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:33:15,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:33:15,608 INFO L85 PathProgramCache]: Analyzing trace with hash 274061373, now seen corresponding path program 16 times [2022-12-14 07:33:15,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:33:15,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097753756] [2022-12-14 07:33:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:15,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:33:15,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:33:15,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430715442] [2022-12-14 07:33:15,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:33:15,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:33:15,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:33:15,659 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:33:15,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 07:33:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:15,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 07:33:15,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:33:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:33:15,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:33:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:33:16,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:33:16,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097753756] [2022-12-14 07:33:16,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:33:16,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430715442] [2022-12-14 07:33:16,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430715442] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:33:16,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1655572911] [2022-12-14 07:33:16,076 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:33:16,076 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:33:16,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:33:16,076 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:33:16,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:33:16,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:16,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:16,149 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 07:33:16,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:33:16,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:16,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:16,220 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:33:16,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:33:16,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:16,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:16,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 07:33:16,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:16,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:16,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:16,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:16,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:16,364 INFO L321 Elim1Store]: treesize reduction 272, result has 16.3 percent of original size [2022-12-14 07:33:16,365 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 9 case distinctions, treesize of input 371 treesize of output 364 [2022-12-14 07:33:16,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:16,488 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:33:16,488 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:33:16,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:16,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:16,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:16,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:16,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:16,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:16,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:16,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:16,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:16,538 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:33:16,539 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 99 treesize of output 75 [2022-12-14 07:33:16,598 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:33:16,610 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:33:17,856 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7522#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:33:17,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:33:17,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:33:17,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2022-12-14 07:33:17,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324616221] [2022-12-14 07:33:17,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:33:17,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 07:33:17,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:33:17,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 07:33:17,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1278, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 07:33:17,857 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:33:18,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:33:18,619 INFO L93 Difference]: Finished difference Result 151 states and 159 transitions. [2022-12-14 07:33:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 07:33:18,621 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-12-14 07:33:18,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:33:18,622 INFO L225 Difference]: With dead ends: 151 [2022-12-14 07:33:18,622 INFO L226 Difference]: Without dead ends: 138 [2022-12-14 07:33:18,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=832, Invalid=3998, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 07:33:18,623 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 177 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:33:18,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 162 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:33:18,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-14 07:33:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 104. [2022-12-14 07:33:18,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 79 states have (on average 1.139240506329114) internal successors, (90), 79 states have internal predecessors, (90), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 07:33:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2022-12-14 07:33:18,691 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 31 [2022-12-14 07:33:18,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:33:18,691 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2022-12-14 07:33:18,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:33:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2022-12-14 07:33:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 07:33:18,692 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:33:18,692 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:33:18,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 07:33:18,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:33:18,893 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:33:18,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:33:18,894 INFO L85 PathProgramCache]: Analyzing trace with hash -400873596, now seen corresponding path program 17 times [2022-12-14 07:33:18,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:33:18,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79988761] [2022-12-14 07:33:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:18,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:33:18,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:33:18,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657870299] [2022-12-14 07:33:18,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:33:18,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:33:18,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:33:18,939 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:33:18,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 07:33:19,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 07:33:19,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:33:19,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 07:33:19,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:33:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:33:19,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:33:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:33:19,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:33:19,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79988761] [2022-12-14 07:33:19,589 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:33:19,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657870299] [2022-12-14 07:33:19,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657870299] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:33:19,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1864940938] [2022-12-14 07:33:19,591 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:33:19,591 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:33:19,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:33:19,591 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:33:19,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:33:19,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:19,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:19,669 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:33:19,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:33:19,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:19,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:19,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 07:33:19,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:19,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:19,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:19,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-12-14 07:33:19,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:19,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:19,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:19,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:19,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:19,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:19,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:19,780 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 07:33:19,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-12-14 07:33:19,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:19,846 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:33:19,846 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:33:19,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:19,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:19,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:19,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:19,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:19,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:19,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:19,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:19,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:19,913 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:33:19,913 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 99 treesize of output 75 [2022-12-14 07:33:19,991 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:33:20,003 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:33:21,215 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8205#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:33:21,215 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:33:21,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:33:21,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2022-12-14 07:33:21,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223269241] [2022-12-14 07:33:21,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:33:21,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 07:33:21,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:33:21,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 07:33:21,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1316, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 07:33:21,217 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:33:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:33:21,641 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2022-12-14 07:33:21,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 07:33:21,641 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-12-14 07:33:21,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:33:21,642 INFO L225 Difference]: With dead ends: 138 [2022-12-14 07:33:21,642 INFO L226 Difference]: Without dead ends: 135 [2022-12-14 07:33:21,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=388, Invalid=1964, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 07:33:21,643 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 54 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:33:21,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 154 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:33:21,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-14 07:33:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2022-12-14 07:33:21,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.1375) internal successors, (91), 80 states have internal predecessors, (91), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 07:33:21,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2022-12-14 07:33:21,707 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 31 [2022-12-14 07:33:21,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:33:21,707 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2022-12-14 07:33:21,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:33:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2022-12-14 07:33:21,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 07:33:21,708 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:33:21,708 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:33:21,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-14 07:33:21,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 07:33:21,909 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:33:21,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:33:21,910 INFO L85 PathProgramCache]: Analyzing trace with hash 457555169, now seen corresponding path program 18 times [2022-12-14 07:33:21,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:33:21,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128010364] [2022-12-14 07:33:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:21,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:33:21,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:33:21,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472324372] [2022-12-14 07:33:21,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:33:21,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:33:21,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:33:21,958 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:33:21,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 07:33:22,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:33:22,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:33:22,831 WARN L261 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 170 conjunts are in the unsatisfiable core [2022-12-14 07:33:22,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:33:22,853 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 10 treesize of output 8 [2022-12-14 07:33:22,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:22,875 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-12-14 07:33:22,877 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 44 [2022-12-14 07:33:22,880 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 21 treesize of output 19 [2022-12-14 07:33:22,885 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 19 treesize of output 16 [2022-12-14 07:33:22,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:22,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:22,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:22,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 41 [2022-12-14 07:33:22,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:22,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:22,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:22,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:22,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:22,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:22,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:22,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:22,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:22,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:22,992 INFO L321 Elim1Store]: treesize reduction 42, result has 31.1 percent of original size [2022-12-14 07:33:22,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 99 treesize of output 82 [2022-12-14 07:33:23,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,082 INFO L321 Elim1Store]: treesize reduction 50, result has 27.5 percent of original size [2022-12-14 07:33:23,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 138 treesize of output 127 [2022-12-14 07:33:23,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,194 INFO L321 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2022-12-14 07:33:23,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 126 treesize of output 131 [2022-12-14 07:33:23,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,346 INFO L321 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2022-12-14 07:33:23,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 46 case distinctions, treesize of input 150 treesize of output 161 [2022-12-14 07:33:23,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,526 INFO L321 Elim1Store]: treesize reduction 74, result has 20.4 percent of original size [2022-12-14 07:33:23,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 22 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 67 case distinctions, treesize of input 195 treesize of output 202 [2022-12-14 07:33:23,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:23,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:23,762 INFO L321 Elim1Store]: treesize reduction 77, result has 14.4 percent of original size [2022-12-14 07:33:23,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 92 case distinctions, treesize of input 332 treesize of output 223 [2022-12-14 07:33:25,244 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 07:33:25,244 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 2 case distinctions, treesize of input 587 treesize of output 408 [2022-12-14 07:33:25,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 158 treesize of output 130 [2022-12-14 07:33:25,272 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-12-14 07:33:25,326 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-12-14 07:33:25,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 435 treesize of output 426 [2022-12-14 07:33:25,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,605 INFO L321 Elim1Store]: treesize reduction 462, result has 16.5 percent of original size [2022-12-14 07:33:25,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 10 select indices, 10 select index equivalence classes, 37 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 24 case distinctions, treesize of input 299 treesize of output 351 [2022-12-14 07:33:25,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:25,829 INFO L321 Elim1Store]: treesize reduction 228, result has 28.5 percent of original size [2022-12-14 07:33:25,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 37 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 18 case distinctions, treesize of input 83 treesize of output 168 [2022-12-14 07:33:26,056 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 141 treesize of output 111 [2022-12-14 07:33:34,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:34,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:34,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:34,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:34,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:34,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:34,832 INFO L321 Elim1Store]: treesize reduction 84, result has 11.6 percent of original size [2022-12-14 07:33:34,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 28 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 807 treesize of output 361 [2022-12-14 07:33:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:33:35,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:33:39,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:33:39,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128010364] [2022-12-14 07:33:39,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:33:39,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472324372] [2022-12-14 07:33:39,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472324372] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:33:39,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [471935559] [2022-12-14 07:33:39,207 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:33:39,207 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:33:39,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:33:39,207 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:33:39,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:33:39,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:39,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:39,275 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:33:39,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:33:39,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:39,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:39,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 07:33:39,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:39,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:39,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 07:33:39,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:39,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:39,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:39,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:39,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:39,441 INFO L321 Elim1Store]: treesize reduction 272, result has 16.3 percent of original size [2022-12-14 07:33:39,441 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 9 case distinctions, treesize of input 371 treesize of output 364 [2022-12-14 07:33:39,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:39,537 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:33:39,538 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:33:39,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:39,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:39,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:39,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:39,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:39,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:39,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:39,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:39,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:39,588 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:33:39,588 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 99 treesize of output 75 [2022-12-14 07:33:39,640 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:33:39,652 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:33:42,194 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8798#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:33:42,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:33:42,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:33:42,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-12-14 07:33:42,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673258638] [2022-12-14 07:33:42,195 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 07:33:42,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 07:33:42,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:33:42,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 07:33:42,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=2503, Unknown=3, NotChecked=0, Total=2862 [2022-12-14 07:33:42,196 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 28 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:33:48,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:33:48,507 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2022-12-14 07:33:48,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 07:33:48,508 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-12-14 07:33:48,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:33:48,509 INFO L225 Difference]: With dead ends: 130 [2022-12-14 07:33:48,509 INFO L226 Difference]: Without dead ends: 115 [2022-12-14 07:33:48,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=422, Invalid=2997, Unknown=3, NotChecked=0, Total=3422 [2022-12-14 07:33:48,510 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:33:48,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 251 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-12-14 07:33:48,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-14 07:33:48,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2022-12-14 07:33:48,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 85 states have internal predecessors, (97), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 07:33:48,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2022-12-14 07:33:48,578 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 32 [2022-12-14 07:33:48,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:33:48,578 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2022-12-14 07:33:48,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:33:48,579 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2022-12-14 07:33:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 07:33:48,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:33:48,579 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:33:48,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 07:33:48,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 07:33:48,780 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:33:48,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:33:48,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1978466191, now seen corresponding path program 4 times [2022-12-14 07:33:48,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:33:48,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661737985] [2022-12-14 07:33:48,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:48,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:33:48,822 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:33:48,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517407584] [2022-12-14 07:33:48,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:33:48,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:33:48,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:33:48,824 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:33:48,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 07:33:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:49,615 WARN L261 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 156 conjunts are in the unsatisfiable core [2022-12-14 07:33:49,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:33:49,632 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 10 treesize of output 8 [2022-12-14 07:33:49,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,654 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-12-14 07:33:49,657 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-12-14 07:33:49,659 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 8 treesize of output 7 [2022-12-14 07:33:49,663 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 8 treesize of output 7 [2022-12-14 07:33:49,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 79 treesize of output 56 [2022-12-14 07:33:49,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:49,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:49,757 INFO L321 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-12-14 07:33:49,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 71 [2022-12-14 07:33:49,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:49,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:49,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:49,826 INFO L321 Elim1Store]: treesize reduction 45, result has 22.4 percent of original size [2022-12-14 07:33:49,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 102 treesize of output 101 [2022-12-14 07:33:49,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:49,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:49,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:49,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:49,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:49,943 INFO L321 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2022-12-14 07:33:49,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 126 treesize of output 131 [2022-12-14 07:33:50,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:50,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:50,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:50,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:50,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:50,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,063 INFO L321 Elim1Store]: treesize reduction 61, result has 12.9 percent of original size [2022-12-14 07:33:50,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 46 case distinctions, treesize of input 128 treesize of output 145 [2022-12-14 07:33:50,708 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 07:33:50,708 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 2 case distinctions, treesize of input 401 treesize of output 270 [2022-12-14 07:33:50,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 158 treesize of output 130 [2022-12-14 07:33:50,726 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-12-14 07:33:50,840 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-12-14 07:33:50,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 218 treesize of output 253 [2022-12-14 07:33:50,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:50,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,036 INFO L321 Elim1Store]: treesize reduction 308, result has 16.5 percent of original size [2022-12-14 07:33:51,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 126 treesize of output 236 [2022-12-14 07:33:51,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,191 INFO L321 Elim1Store]: treesize reduction 152, result has 28.6 percent of original size [2022-12-14 07:33:51,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 69 treesize of output 132 [2022-12-14 07:33:51,337 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 07:33:51,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 263 treesize of output 224 [2022-12-14 07:33:51,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:51,531 INFO L321 Elim1Store]: treesize reduction 142, result has 34.9 percent of original size [2022-12-14 07:33:51,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 122 treesize of output 179 [2022-12-14 07:33:51,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 36 [2022-12-14 07:33:51,634 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-12-14 07:33:51,634 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 2 case distinctions, treesize of input 135 treesize of output 112 [2022-12-14 07:33:51,646 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 17 treesize of output 11 [2022-12-14 07:33:54,056 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 07:33:54,056 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 2 case distinctions, treesize of input 719 treesize of output 514 [2022-12-14 07:33:54,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 158 treesize of output 130 [2022-12-14 07:33:54,086 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-12-14 07:33:54,148 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-12-14 07:33:54,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 526 treesize of output 525 [2022-12-14 07:33:54,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,363 INFO L321 Elim1Store]: treesize reduction 152, result has 28.6 percent of original size [2022-12-14 07:33:54,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 349 treesize of output 338 [2022-12-14 07:33:54,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:54,551 INFO L321 Elim1Store]: treesize reduction 308, result has 16.5 percent of original size [2022-12-14 07:33:54,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 318 treesize of output 358 [2022-12-14 07:33:58,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 11 [2022-12-14 07:33:59,393 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-12-14 07:33:59,393 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 2 case distinctions, treesize of input 1114 treesize of output 947 [2022-12-14 07:33:59,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:59,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:59,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:59,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:59,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:59,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:59,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:33:59,517 INFO L321 Elim1Store]: treesize reduction 68, result has 42.9 percent of original size [2022-12-14 07:33:59,518 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 6 case distinctions, treesize of input 1015 treesize of output 986 [2022-12-14 07:34:00,820 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 1185 treesize of output 1038 [2022-12-14 07:34:00,840 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 1127 treesize of output 1121 [2022-12-14 07:34:13,640 INFO L321 Elim1Store]: treesize reduction 576, result has 39.0 percent of original size [2022-12-14 07:34:13,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 15 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 1057 treesize of output 797 [2022-12-14 07:34:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:49,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:34:50,258 WARN L837 $PredicateComparison]: unable to prove that (or (not (< 5 c_~ARR_SIZE~0)) (forall ((v_ArrVal_2407 (Array Int Int)) (v_ArrVal_2405 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse0 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_2407) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_2405) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4)) (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3))))))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse0 (+ 16 |c_ULTIMATE.start_main_~#array2~0#1.offset|)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 20)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 20)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 16)))))) 0))) is different from false [2022-12-14 07:34:52,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:52,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661737985] [2022-12-14 07:34:52,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:34:52,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517407584] [2022-12-14 07:34:52,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517407584] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:34:52,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638887494] [2022-12-14 07:34:52,142 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:34:52,142 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:34:52,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:34:52,142 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:34:52,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:34:52,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,214 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:34:52,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:34:52,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 07:34:52,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 07:34:52,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:34:52,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:34:52,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:34:52,376 INFO L321 Elim1Store]: treesize reduction 272, result has 16.3 percent of original size [2022-12-14 07:34:52,376 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 9 case distinctions, treesize of input 371 treesize of output 364 [2022-12-14 07:34:52,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:34:52,523 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:34:52,523 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:34:52,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:34:52,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:34:52,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:34:52,583 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:34:52,583 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 99 treesize of output 75 [2022-12-14 07:34:52,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:52,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:34:52,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:34:52,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:34:52,649 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:34:52,649 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 99 treesize of output 75 [2022-12-14 07:34:52,733 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:34:52,753 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:34:55,236 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9381#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:34:55,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:34:55,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:34:55,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-12-14 07:34:55,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130623422] [2022-12-14 07:34:55,236 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 07:34:55,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 07:34:55,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:55,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 07:34:55,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2161, Unknown=1, NotChecked=96, Total=2550 [2022-12-14 07:34:55,238 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand has 28 states, 25 states have (on average 1.12) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:34:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:59,247 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2022-12-14 07:34:59,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 07:34:59,248 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.12) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2022-12-14 07:34:59,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:59,249 INFO L225 Difference]: With dead ends: 135 [2022-12-14 07:34:59,249 INFO L226 Difference]: Without dead ends: 124 [2022-12-14 07:34:59,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=356, Invalid=2617, Unknown=1, NotChecked=106, Total=3080 [2022-12-14 07:34:59,250 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:59,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 172 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 07:34:59,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-12-14 07:34:59,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2022-12-14 07:34:59,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-14 07:34:59,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 129 transitions. [2022-12-14 07:34:59,329 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 129 transitions. Word has length 34 [2022-12-14 07:34:59,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:59,330 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 129 transitions. [2022-12-14 07:34:59,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.12) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:34:59,330 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 129 transitions. [2022-12-14 07:34:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 07:34:59,330 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:59,330 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:34:59,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 07:34:59,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:34:59,531 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1850895549, now seen corresponding path program 19 times [2022-12-14 07:34:59,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:59,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063619835] [2022-12-14 07:34:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:59,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:59,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:34:59,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880368221] [2022-12-14 07:34:59,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:34:59,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:34:59,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:34:59,580 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:34:59,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 07:34:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:59,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:34:59,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:34:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 38 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:59,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:35:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:35:00,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:00,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063619835] [2022-12-14 07:35:00,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:35:00,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880368221] [2022-12-14 07:35:00,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880368221] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:35:00,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1262139829] [2022-12-14 07:35:00,115 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:35:00,115 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:35:00,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:35:00,115 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:35:00,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:35:00,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:00,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:00,188 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 07:35:00,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:35:00,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:00,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:00,251 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:35:00,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:35:00,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:00,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:00,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 07:35:00,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:00,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:00,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:00,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:00,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:00,392 INFO L321 Elim1Store]: treesize reduction 272, result has 16.3 percent of original size [2022-12-14 07:35:00,392 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 9 case distinctions, treesize of input 371 treesize of output 364 [2022-12-14 07:35:00,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:00,614 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-12-14 07:35:00,614 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-12-14 07:35:00,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:00,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:00,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:00,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:00,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:00,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:00,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:00,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:00,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:00,670 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-12-14 07:35:00,670 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 99 treesize of output 75 [2022-12-14 07:35:00,726 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-12-14 07:35:00,740 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:35:01,910 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10027#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:35:01,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:35:01,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:35:01,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2022-12-14 07:35:01,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832969291] [2022-12-14 07:35:01,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:35:01,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 07:35:01,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:01,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 07:35:01,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1522, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 07:35:01,913 INFO L87 Difference]: Start difference. First operand 118 states and 129 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:35:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:02,490 INFO L93 Difference]: Finished difference Result 171 states and 179 transitions. [2022-12-14 07:35:02,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 07:35:02,491 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2022-12-14 07:35:02,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:02,491 INFO L225 Difference]: With dead ends: 171 [2022-12-14 07:35:02,492 INFO L226 Difference]: Without dead ends: 168 [2022-12-14 07:35:02,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 46 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=459, Invalid=2297, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 07:35:02,492 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 63 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:02,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 264 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:35:02,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-12-14 07:35:02,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 126. [2022-12-14 07:35:02,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 95 states have internal predecessors, (108), 15 states have call successors, (15), 15 states have call predecessors, (15), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 07:35:02,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 138 transitions. [2022-12-14 07:35:02,632 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 138 transitions. Word has length 33 [2022-12-14 07:35:02,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:02,632 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 138 transitions. [2022-12-14 07:35:02,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:35:02,632 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 138 transitions. [2022-12-14 07:35:02,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 07:35:02,633 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:02,633 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:02,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 07:35:02,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 07:35:02,834 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:02,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:02,834 INFO L85 PathProgramCache]: Analyzing trace with hash 157720253, now seen corresponding path program 5 times [2022-12-14 07:35:02,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:02,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702097051] [2022-12-14 07:35:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:02,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:02,877 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:35:02,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859476832] [2022-12-14 07:35:02,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:35:02,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:35:02,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:35:02,879 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:35:02,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 07:35:03,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 07:35:03,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:35:03,655 WARN L261 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 127 conjunts are in the unsatisfiable core [2022-12-14 07:35:03,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:35:03,666 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 10 treesize of output 8 [2022-12-14 07:35:03,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:03,689 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-12-14 07:35:03,694 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 21 treesize of output 19 [2022-12-14 07:35:03,696 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 42 treesize of output 39 [2022-12-14 07:35:03,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:03,736 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2022-12-14 07:35:03,740 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-12-14 07:35:03,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:03,743 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 18 treesize of output 22 [2022-12-14 07:35:03,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:03,752 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 16 treesize of output 20 [2022-12-14 07:35:03,802 INFO L321 Elim1Store]: treesize reduction 32, result has 13.5 percent of original size [2022-12-14 07:35:03,802 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 2 case distinctions, treesize of input 101 treesize of output 82 [2022-12-14 07:35:03,806 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 0 case distinctions, treesize of input 38 treesize of output 41 [2022-12-14 07:35:03,818 INFO L321 Elim1Store]: treesize reduction 49, result has 9.3 percent of original size [2022-12-14 07:35:03,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 71 [2022-12-14 07:35:03,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:03,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:03,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 34 [2022-12-14 07:35:03,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:03,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:03,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 29 treesize of output 38 [2022-12-14 07:35:03,851 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 5 [2022-12-14 07:35:03,916 INFO L321 Elim1Store]: treesize reduction 41, result has 10.9 percent of original size [2022-12-14 07:35:03,916 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 2 case distinctions, treesize of input 199 treesize of output 145 [2022-12-14 07:35:03,937 INFO L321 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2022-12-14 07:35:03,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 150 [2022-12-14 07:35:03,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:03,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:03,987 INFO L321 Elim1Store]: treesize reduction 70, result has 27.1 percent of original size [2022-12-14 07:35:03,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 123 treesize of output 101 [2022-12-14 07:35:03,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:03,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,040 INFO L321 Elim1Store]: treesize reduction 109, result has 19.3 percent of original size [2022-12-14 07:35:04,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 91 [2022-12-14 07:35:04,051 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 20 treesize of output 19 [2022-12-14 07:35:04,062 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 28 treesize of output 17 [2022-12-14 07:35:04,067 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 17 treesize of output 11 [2022-12-14 07:35:04,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:04,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:04,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:05,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:05,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:05,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:05,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:05,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:05,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:05,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:05,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:05,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:05,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:05,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:05,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:05,161 INFO L321 Elim1Store]: treesize reduction 684, result has 9.8 percent of original size [2022-12-14 07:35:05,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 13 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 71 case distinctions, treesize of input 235 treesize of output 210 [2022-12-14 07:35:07,143 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 07:35:07,143 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 2 case distinctions, treesize of input 561 treesize of output 396 [2022-12-14 07:35:07,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 158 treesize of output 130 [2022-12-14 07:35:07,169 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-12-14 07:35:07,259 INFO L321 Elim1Store]: treesize reduction 111, result has 8.3 percent of original size [2022-12-14 07:35:07,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 386 treesize of output 409 [2022-12-14 07:35:07,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:07,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:07,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:07,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:07,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:07,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:07,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:07,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:07,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:07,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:08,157 INFO L321 Elim1Store]: treesize reduction 642, result has 23.7 percent of original size [2022-12-14 07:35:08,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 278 treesize of output 490 [2022-12-14 07:35:08,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:08,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:08,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:08,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:08,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:08,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:08,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:08,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:08,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:08,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:08,298 INFO L217 Elim1Store]: Index analysis took 108 ms [2022-12-14 07:35:09,216 INFO L321 Elim1Store]: treesize reduction 380, result has 34.4 percent of original size [2022-12-14 07:35:09,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 19 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 175 treesize of output 334 [2022-12-14 07:35:47,087 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 1498 treesize of output 1456 [2022-12-14 07:35:47,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:47,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:47,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:47,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:47,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:47,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:47,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:47,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:47,196 INFO L321 Elim1Store]: treesize reduction 82, result has 38.3 percent of original size [2022-12-14 07:35:47,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 1456 treesize of output 1444 [2022-12-14 07:35:54,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:54,661 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 822 treesize of output 671 [2022-12-14 07:35:54,679 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 738 treesize of output 668 [2022-12-14 07:35:54,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:54,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:54,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:54,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:54,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:54,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:54,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:09,450 WARN L233 SmtUtils]: Spent 14.74s on a formula simplification. DAG size of input: 728 DAG size of output: 537 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 07:36:09,452 INFO L321 Elim1Store]: treesize reduction 880, result has 63.9 percent of original size [2022-12-14 07:36:09,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 19 select indices, 19 select index equivalence classes, 16 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 174 case distinctions, treesize of input 637 treesize of output 2057 [2022-12-14 07:36:09,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:09,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:09,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:09,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:10,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:10,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:10,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:10,335 INFO L217 Elim1Store]: Index analysis took 755 ms [2022-12-14 07:36:35,854 WARN L233 SmtUtils]: Spent 25.51s on a formula simplification. DAG size of input: 728 DAG size of output: 537 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 07:36:35,857 INFO L321 Elim1Store]: treesize reduction 880, result has 63.9 percent of original size [2022-12-14 07:36:35,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 19 select indices, 19 select index equivalence classes, 22 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 168 case distinctions, treesize of input 476 treesize of output 1880 [2022-12-14 07:43:21,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2022-12-14 07:43:21,784 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-12-14 07:43:21,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:43:21,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702097051] [2022-12-14 07:43:21,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:43:21,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859476832] [2022-12-14 07:43:21,785 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2022-12-14 07:43:21,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1589614927] [2022-12-14 07:43:21,786 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:43:21,786 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:43:21,786 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:43:21,786 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:43:21,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:43:21,789 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:273) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:221) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 44 more [2022-12-14 07:43:21,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:43:21,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2022-12-14 07:43:21,790 ERROR L170 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2022-12-14 07:43:21,791 INFO L360 BasicCegarLoop]: Counterexample might be feasible [2022-12-14 07:43:21,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 07:43:21,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 07:43:21,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 07:43:22,004 INFO L445 BasicCegarLoop]: Path program histogram: [19, 5, 1, 1, 1] [2022-12-14 07:43:22,006 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 07:43:22,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 07:43:22 BoogieIcfgContainer [2022-12-14 07:43:22,015 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 07:43:22,016 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 07:43:22,016 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 07:43:22,016 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 07:43:22,016 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:30:47" (3/4) ... [2022-12-14 07:43:22,018 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-14 07:43:22,018 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 07:43:22,018 INFO L158 Benchmark]: Toolchain (without parser) took 755065.09ms. Allocated memory was 125.8MB in the beginning and 220.2MB in the end (delta: 94.4MB). Free memory was 91.5MB in the beginning and 108.4MB in the end (delta: -16.9MB). Peak memory consumption was 79.1MB. Max. memory is 16.1GB. [2022-12-14 07:43:22,018 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 125.8MB. Free memory is still 93.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:43:22,018 INFO L158 Benchmark]: CACSL2BoogieTranslator took 164.51ms. Allocated memory is still 125.8MB. Free memory was 91.5MB in the beginning and 80.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 07:43:22,019 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.36ms. Allocated memory is still 125.8MB. Free memory was 80.7MB in the beginning and 79.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 07:43:22,019 INFO L158 Benchmark]: Boogie Preprocessor took 16.70ms. Allocated memory is still 125.8MB. Free memory was 79.0MB in the beginning and 77.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:43:22,019 INFO L158 Benchmark]: RCFGBuilder took 246.70ms. Allocated memory is still 125.8MB. Free memory was 77.8MB in the beginning and 64.3MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 07:43:22,019 INFO L158 Benchmark]: TraceAbstraction took 754605.81ms. Allocated memory was 125.8MB in the beginning and 220.2MB in the end (delta: 94.4MB). Free memory was 63.5MB in the beginning and 108.4MB in the end (delta: -45.0MB). Peak memory consumption was 51.8MB. Max. memory is 16.1GB. [2022-12-14 07:43:22,019 INFO L158 Benchmark]: Witness Printer took 2.46ms. Allocated memory is still 220.2MB. Free memory is still 108.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:43:22,019 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 125.8MB. Free memory is still 93.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 164.51ms. Allocated memory is still 125.8MB. Free memory was 91.5MB in the beginning and 80.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.36ms. Allocated memory is still 125.8MB. Free memory was 80.7MB in the beginning and 79.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.70ms. Allocated memory is still 125.8MB. Free memory was 79.0MB in the beginning and 77.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 246.70ms. Allocated memory is still 125.8MB. Free memory was 77.8MB in the beginning and 64.3MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 754605.81ms. Allocated memory was 125.8MB in the beginning and 220.2MB in the end (delta: 94.4MB). Free memory was 63.5MB in the beginning and 108.4MB in the end (delta: -45.0MB). Peak memory consumption was 51.8MB. Max. memory is 16.1GB. * Witness Printer took 2.46ms. Allocated memory is still 220.2MB. Free memory is still 108.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 33]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L37] signed long long ARR_SIZE ; [L41] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L42] CALL assume_abort_if_not(ARR_SIZE > 0) [L31] COND FALSE !(!cond) [L42] RET assume_abort_if_not(ARR_SIZE > 0) [L44] int array1[ARR_SIZE] ; [L45] int array2[ARR_SIZE] ; [L46] int count = 0, num = -1 ; [L47] signed long long sum = 0 ; [L48] int temp ; [L49] short index ; [L51] count=0 [L51] COND TRUE count 0 && index < ARR_SIZE-1) [L31] COND FALSE !(!cond) [L61] RET assume_abort_if_not(index > 0 && index < ARR_SIZE-1) [L63] EXPR array1[index-1] [L63] EXPR array1[index+1] [L63] array1[index] = array1[index-1] + array1[index+1] [L64] EXPR array2[index-1] [L64] EXPR array2[index+1] [L64] array2[index] = array2[index-1] + array2[index+1] [L66] temp = __VERIFIER_nondet_int() [L67] COND FALSE !(temp == 0) [L57] COND TRUE 1 [L60] index = __VERIFIER_nondet_short() [L61] CALL assume_abort_if_not(index > 0 && index < ARR_SIZE-1) [L31] COND FALSE !(!cond) [L61] RET assume_abort_if_not(index > 0 && index < ARR_SIZE-1) [L63] EXPR array1[index-1] [L63] EXPR array1[index+1] [L63] array1[index] = array1[index-1] + array1[index+1] [L64] EXPR array2[index-1] [L64] EXPR array2[index+1] [L64] array2[index] = array2[index-1] + array2[index+1] [L66] temp = __VERIFIER_nondet_int() [L67] COND FALSE !(temp == 0) [L57] COND TRUE 1 [L60] index = __VERIFIER_nondet_short() [L61] CALL assume_abort_if_not(index > 0 && index < ARR_SIZE-1) [L31] COND FALSE !(!cond) [L61] RET assume_abort_if_not(index > 0 && index < ARR_SIZE-1) [L63] EXPR array1[index-1] [L63] EXPR array1[index+1] [L63] array1[index] = array1[index-1] + array1[index+1] [L64] EXPR array2[index-1] [L64] EXPR array2[index+1] [L64] array2[index] = array2[index-1] + array2[index+1] [L66] temp = __VERIFIER_nondet_int() [L67] COND TRUE temp == 0 [L70] count=0 [L70] COND TRUE count main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh 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 -> 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 [2022-12-14 07:43:23,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:43:23,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:43:23,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:43:23,855 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:43:23,855 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:43:23,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-patterns/array6_pattern.c [2022-12-14 07:43:26,465 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:43:26,639 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:43:26,639 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/sv-benchmarks/c/array-patterns/array6_pattern.c [2022-12-14 07:43:26,646 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/data/ec5b83988/84d1e90c85294042824329a5262842f2/FLAG64700d096 [2022-12-14 07:43:26,659 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/data/ec5b83988/84d1e90c85294042824329a5262842f2 [2022-12-14 07:43:26,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:43:26,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:43:26,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:43:26,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:43:26,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:43:26,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:43:26" (1/1) ... [2022-12-14 07:43:26,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7532185c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:26, skipping insertion in model container [2022-12-14 07:43:26,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:43:26" (1/1) ... [2022-12-14 07:43:26,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:43:26,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:43:26,833 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_45f688a1-8c5e-441d-baa8-5384e75e4889/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2022-12-14 07:43:26,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:43:26,866 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:43:26,879 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_45f688a1-8c5e-441d-baa8-5384e75e4889/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2022-12-14 07:43:26,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:43:26,904 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:43:26,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:26 WrapperNode [2022-12-14 07:43:26,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:43:26,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:43:26,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:43:26,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:43:26,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:26" (1/1) ... [2022-12-14 07:43:26,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:26" (1/1) ... [2022-12-14 07:43:26,942 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2022-12-14 07:43:26,942 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:43:26,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:43:26,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:43:26,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:43:26,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:26" (1/1) ... [2022-12-14 07:43:26,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:26" (1/1) ... [2022-12-14 07:43:26,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:26" (1/1) ... [2022-12-14 07:43:26,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:26" (1/1) ... [2022-12-14 07:43:26,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:26" (1/1) ... [2022-12-14 07:43:26,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:26" (1/1) ... [2022-12-14 07:43:26,967 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:26" (1/1) ... [2022-12-14 07:43:26,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:26" (1/1) ... [2022-12-14 07:43:26,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:43:26,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:43:26,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:43:26,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:43:26,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:26" (1/1) ... [2022-12-14 07:43:26,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:43:26,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:43:27,002 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:43:27,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:43:27,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:43:27,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 07:43:27,040 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 07:43:27,040 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 07:43:27,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:43:27,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 07:43:27,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:43:27,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:43:27,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:43:27,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 07:43:27,112 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:43:27,117 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:43:27,315 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:43:27,319 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:43:27,320 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 07:43:27,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:43:27 BoogieIcfgContainer [2022-12-14 07:43:27,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:43:27,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:43:27,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:43:27,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:43:27,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:43:26" (1/3) ... [2022-12-14 07:43:27,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36199e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:43:27, skipping insertion in model container [2022-12-14 07:43:27,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:43:26" (2/3) ... [2022-12-14 07:43:27,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36199e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:43:27, skipping insertion in model container [2022-12-14 07:43:27,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:43:27" (3/3) ... [2022-12-14 07:43:27,327 INFO L112 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2022-12-14 07:43:27,340 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:43:27,340 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:43:27,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:43:27,378 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;@4d3a011a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:43:27,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:43:27,381 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:43:27,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:43:27,387 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:43:27,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:43:27,388 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:43:27,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:43:27,392 INFO L85 PathProgramCache]: Analyzing trace with hash -800294020, now seen corresponding path program 1 times [2022-12-14 07:43:27,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:43:27,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918916010] [2022-12-14 07:43:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:43:27,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:43:27,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:43:27,403 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:43:27,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 07:43:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:43:27,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 07:43:27,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:43:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:43:27,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:43:27,487 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:43:27,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918916010] [2022-12-14 07:43:27,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918916010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:43:27,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:43:27,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:43:27,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074310295] [2022-12-14 07:43:27,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:43:27,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 07:43:27,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:43:27,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 07:43:27,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:43:27,522 INFO L87 Difference]: Start difference. First operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:43:27,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:43:27,539 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2022-12-14 07:43:27,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 07:43:27,541 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-12-14 07:43:27,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:43:27,546 INFO L225 Difference]: With dead ends: 47 [2022-12-14 07:43:27,546 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 07:43:27,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:43:27,552 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:43:27,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:43:27,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 07:43:27,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 07:43:27,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:43:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-12-14 07:43:27,582 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2022-12-14 07:43:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:43:27,582 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-12-14 07:43:27,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:43:27,583 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-12-14 07:43:27,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 07:43:27,584 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:43:27,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:43:27,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:43:27,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:43:27,786 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:43:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:43:27,789 INFO L85 PathProgramCache]: Analyzing trace with hash -952637313, now seen corresponding path program 1 times [2022-12-14 07:43:27,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:43:27,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579407769] [2022-12-14 07:43:27,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:43:27,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:43:27,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:43:27,795 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:43:27,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 07:43:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:43:27,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:43:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:43:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:43:27,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:43:27,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:43:27,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579407769] [2022-12-14 07:43:27,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579407769] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:43:27,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:43:27,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:43:27,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851046486] [2022-12-14 07:43:27,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:43:27,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:43:27,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:43:27,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:43:27,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:43:27,986 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:43:28,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:43:28,013 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-12-14 07:43:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:43:28,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-12-14 07:43:28,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:43:28,015 INFO L225 Difference]: With dead ends: 26 [2022-12-14 07:43:28,015 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 07:43:28,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:43:28,017 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:43:28,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 54 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:43:28,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 07:43:28,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 07:43:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:43:28,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-12-14 07:43:28,021 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 22 [2022-12-14 07:43:28,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:43:28,022 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-12-14 07:43:28,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:43:28,022 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-12-14 07:43:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 07:43:28,023 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:43:28,023 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:43:28,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 07:43:28,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:43:28,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:43:28,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:43:28,227 INFO L85 PathProgramCache]: Analyzing trace with hash -603190335, now seen corresponding path program 1 times [2022-12-14 07:43:28,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:43:28,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492474134] [2022-12-14 07:43:28,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:43:28,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:43:28,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:43:28,234 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:43:28,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 07:43:28,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:43:28,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:43:28,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:43:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:43:28,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:43:28,547 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:43:28,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492474134] [2022-12-14 07:43:28,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492474134] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:43:28,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:43:28,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:43:28,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583540515] [2022-12-14 07:43:28,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:43:28,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:43:28,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:43:28,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:43:28,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:43:28,550 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:43:28,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:43:28,827 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-12-14 07:43:28,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:43:28,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-12-14 07:43:28,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:43:28,829 INFO L225 Difference]: With dead ends: 45 [2022-12-14 07:43:28,829 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 07:43:28,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:43:28,831 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:43:28,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 43 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:43:28,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 07:43:28,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-12-14 07:43:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:43:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-12-14 07:43:28,838 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2022-12-14 07:43:28,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:43:28,838 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-12-14 07:43:28,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:43:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-12-14 07:43:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 07:43:28,839 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:43:28,839 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:43:28,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 07:43:29,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:43:29,041 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:43:29,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:43:29,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1366149955, now seen corresponding path program 1 times [2022-12-14 07:43:29,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:43:29,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256138200] [2022-12-14 07:43:29,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:43:29,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:43:29,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:43:29,048 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:43:29,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 07:43:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:43:29,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:43:29,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:43:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:43:29,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:43:29,701 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:43:29,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256138200] [2022-12-14 07:43:29,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256138200] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:43:29,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [945862741] [2022-12-14 07:43:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:43:29,702 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:43:29,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:43:29,722 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:43:29,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-12-14 07:43:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:43:29,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:43:29,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:43:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:43:30,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:43:30,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [945862741] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:43:30,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452296535] [2022-12-14 07:43:30,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:43:30,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:43:30,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:43:30,112 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:43:30,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:43:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:43:30,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:43:30,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:43:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:43:30,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:43:30,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452296535] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:43:30,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:43:30,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 17 [2022-12-14 07:43:30,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412552923] [2022-12-14 07:43:30,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:43:30,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 07:43:30,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:43:30,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 07:43:30,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-12-14 07:43:30,474 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:43:30,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:43:30,886 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2022-12-14 07:43:30,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 07:43:30,886 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-12-14 07:43:30,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:43:30,887 INFO L225 Difference]: With dead ends: 59 [2022-12-14 07:43:30,887 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 07:43:30,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-12-14 07:43:30,888 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:43:30,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 101 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:43:30,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 07:43:30,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2022-12-14 07:43:30,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:43:30,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-12-14 07:43:30,892 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2022-12-14 07:43:30,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:43:30,893 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-12-14 07:43:30,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:43:30,893 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-12-14 07:43:30,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 07:43:30,894 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:43:30,894 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:43:30,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-12-14 07:43:31,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 07:43:31,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 07:43:31,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:43:31,496 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:43:31,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:43:31,498 INFO L85 PathProgramCache]: Analyzing trace with hash -178408891, now seen corresponding path program 2 times [2022-12-14 07:43:31,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:43:31,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084393510] [2022-12-14 07:43:31,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:43:31,499 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:43:31,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:43:31,500 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:43:31,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 07:43:31,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:43:31,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:43:31,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:43:31,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:43:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:43:31,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:43:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:43:32,186 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:43:32,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084393510] [2022-12-14 07:43:32,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084393510] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:43:32,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [692626171] [2022-12-14 07:43:32,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:43:32,187 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:43:32,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:43:32,187 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:43:32,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 07:43:32,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:43:32,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:43:32,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:43:32,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:43:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:43:32,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:43:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:43:33,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [692626171] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:43:33,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907562864] [2022-12-14 07:43:33,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:43:33,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:43:33,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:43:33,170 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:43:33,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 07:43:33,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:43:33,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:43:33,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:43:33,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:43:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:43:33,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:43:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:43:33,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907562864] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:43:33,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:43:33,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 11, 10, 7, 8] total 34 [2022-12-14 07:43:33,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113479186] [2022-12-14 07:43:33,622 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:43:33,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 07:43:33,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:43:33,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 07:43:33,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=848, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 07:43:33,623 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 33 states have internal predecessors, (87), 6 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 07:43:34,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:43:34,603 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2022-12-14 07:43:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 07:43:34,604 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 33 states have internal predecessors, (87), 6 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 28 [2022-12-14 07:43:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:43:34,604 INFO L225 Difference]: With dead ends: 63 [2022-12-14 07:43:34,604 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 07:43:34,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 127 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=468, Invalid=1512, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 07:43:34,606 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 108 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:43:34,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 147 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:43:34,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 07:43:34,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-12-14 07:43:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:43:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-12-14 07:43:34,610 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2022-12-14 07:43:34,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:43:34,611 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-12-14 07:43:34,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 33 states have internal predecessors, (87), 6 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 07:43:34,611 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-12-14 07:43:34,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 07:43:34,611 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:43:34,611 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:43:34,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-14 07:43:34,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 07:43:35,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-12-14 07:43:35,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:43:35,215 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:43:35,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:43:35,217 INFO L85 PathProgramCache]: Analyzing trace with hash -475590135, now seen corresponding path program 3 times [2022-12-14 07:43:35,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:43:35,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120975032] [2022-12-14 07:43:35,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:43:35,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:43:35,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:43:35,222 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:43:35,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 07:43:35,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 07:43:35,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:43:35,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:43:35,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:43:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:43:35,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:43:36,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:43:36,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120975032] [2022-12-14 07:43:36,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120975032] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:43:36,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [874301823] [2022-12-14 07:43:36,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:43:36,204 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:43:36,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:43:36,205 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:43:36,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 07:43:36,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 07:43:36,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:43:36,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:43:36,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:43:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:43:36,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:43:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:43:37,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [874301823] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:43:37,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176984646] [2022-12-14 07:43:37,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:43:37,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:43:37,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:43:37,304 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:43:37,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 07:43:37,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 07:43:37,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:43:37,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:43:37,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:43:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:43:37,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:43:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:43:37,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176984646] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:43:37,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2022-12-14 07:43:37,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10, 12, 10] total 20 [2022-12-14 07:43:37,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070861647] [2022-12-14 07:43:37,886 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2022-12-14 07:43:37,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 07:43:37,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:43:37,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 07:43:37,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-12-14 07:43:37,888 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 07:43:39,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:43:39,155 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-12-14 07:43:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 07:43:39,155 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32 [2022-12-14 07:43:39,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:43:39,156 INFO L225 Difference]: With dead ends: 46 [2022-12-14 07:43:39,156 INFO L226 Difference]: Without dead ends: 42 [2022-12-14 07:43:39,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=262, Invalid=860, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 07:43:39,157 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:43:39,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 95 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:43:39,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-14 07:43:39,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2022-12-14 07:43:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:43:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-12-14 07:43:39,165 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2022-12-14 07:43:39,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:43:39,165 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-12-14 07:43:39,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 07:43:39,165 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-12-14 07:43:39,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 07:43:39,166 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:43:39,166 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:43:39,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-12-14 07:43:39,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 07:43:39,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-12-14 07:43:39,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:43:39,768 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:43:39,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:43:39,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1722352949, now seen corresponding path program 4 times [2022-12-14 07:43:39,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:43:39,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218052602] [2022-12-14 07:43:39,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:43:39,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:43:39,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:43:39,772 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:43:39,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 07:43:39,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:43:39,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:43:40,012 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 07:43:40,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:43:40,108 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 10 treesize of output 8 [2022-12-14 07:43:40,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:43:40,201 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 47 treesize of output 28 [2022-12-14 07:43:40,827 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 81 treesize of output 67 [2022-12-14 07:43:41,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:41,619 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 84 treesize of output 76 [2022-12-14 07:43:43,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:43,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:43,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:43,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:43,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:43,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:43,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:43,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:43,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:43,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:43,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:43,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:43:43,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:43:43,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:43,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:43,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:43,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:43:43,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:43:43,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:43:43,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:43,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:43:43,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:43:43,070 INFO L321 Elim1Store]: treesize reduction 131, result has 9.7 percent of original size [2022-12-14 07:43:43,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 38 case distinctions, treesize of input 152 treesize of output 130 [2022-12-14 07:43:44,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:43:44,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:44,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:44,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:43:44,921 INFO L321 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2022-12-14 07:43:44,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 106 treesize of output 48 [2022-12-14 07:43:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:43:45,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:43:51,764 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:43:51,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218052602] [2022-12-14 07:43:51,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218052602] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:43:51,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1638682077] [2022-12-14 07:43:51,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:43:51,765 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:43:51,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:43:51,765 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:43:51,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 07:43:52,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:43:52,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:43:52,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 07:43:52,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:43:52,228 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 10 treesize of output 8 [2022-12-14 07:43:52,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:52,427 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2022-12-14 07:43:52,436 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 15 treesize of output 14 [2022-12-14 07:43:52,441 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 32 treesize of output 31 [2022-12-14 07:43:52,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:52,675 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 62 [2022-12-14 07:43:52,684 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-12-14 07:43:52,691 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 30 treesize of output 34 [2022-12-14 07:43:52,704 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 27 treesize of output 31 [2022-12-14 07:43:54,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:54,166 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 57 [2022-12-14 07:43:54,173 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-12-14 07:43:54,179 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 27 treesize of output 31 [2022-12-14 07:43:54,201 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 25 treesize of output 29 [2022-12-14 07:43:58,218 INFO L321 Elim1Store]: treesize reduction 49, result has 9.3 percent of original size [2022-12-14 07:43:58,218 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 2 case distinctions, treesize of input 345 treesize of output 221 [2022-12-14 07:43:58,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 170 treesize of output 138 [2022-12-14 07:43:58,256 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 161 [2022-12-14 07:43:58,350 INFO L321 Elim1Store]: treesize reduction 121, result has 4.0 percent of original size [2022-12-14 07:43:58,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 185 treesize of output 228 [2022-12-14 07:43:58,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:43:58,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:58,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:58,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:58,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:43:58,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:58,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 134 [2022-12-14 07:43:58,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:58,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:43:58,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:58,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:43:58,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:58,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 47 [2022-12-14 07:43:58,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 38 [2022-12-14 07:43:59,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:43:59,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:59,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:43:59,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:43:59,716 INFO L321 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2022-12-14 07:43:59,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 106 treesize of output 48 [2022-12-14 07:43:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:43:59,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:44:00,029 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_365 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_369 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd ((_ sign_extend 32) (_ bv4294967294 32)) ((_ sign_extend 32) (_ bv2 32))) (let ((.cse3 (bvmul ((_ sign_extend 16) |c_ULTIMATE.start_main_~index~0#1|) (_ bv4 32)))) (let ((.cse1 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_369) |c_ULTIMATE.start_main_~#array2~0#1.base|) (bvadd |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_365) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (bvadd (select .cse4 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3)) (select .cse4 (bvadd (_ bv4294967292 32) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3))))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (bvadd |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (bvadd (select .cse2 (bvadd (_ bv4294967292 32) |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3)) (select .cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (bvadd ((_ sign_extend 32) (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) ((_ sign_extend 32) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|)) ((_ sign_extend 32) (select .cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) ((_ sign_extend 32) (select .cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array2~0#1.offset|))) ((_ sign_extend 32) (select .cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~#array2~0#1.offset|))) ((_ sign_extend 32) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|)) |c_ULTIMATE.start_main_~sum~0#1|)))))) is different from false [2022-12-14 07:44:05,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1638682077] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:44:05,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052892289] [2022-12-14 07:44:05,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:44:05,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:44:05,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:44:05,816 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:44:05,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 07:44:05,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:44:05,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:44:05,959 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-14 07:44:05,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:44:06,038 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 10 treesize of output 8 [2022-12-14 07:44:06,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:06,080 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2022-12-14 07:44:06,093 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 15 treesize of output 14 [2022-12-14 07:44:06,103 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 32 treesize of output 31 [2022-12-14 07:44:06,269 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 81 treesize of output 67 [2022-12-14 07:44:06,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:06,621 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 84 treesize of output 76 [2022-12-14 07:44:07,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:07,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:07,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:07,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:07,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:07,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:07,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:07,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:07,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:07,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:07,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:07,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:07,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:07,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:07,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:07,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:07,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:07,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:07,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:07,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:07,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:07,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:07,605 INFO L321 Elim1Store]: treesize reduction 131, result has 9.7 percent of original size [2022-12-14 07:44:07,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 38 case distinctions, treesize of input 152 treesize of output 130 [2022-12-14 07:44:08,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:08,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:08,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:08,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:08,782 INFO L321 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2022-12-14 07:44:08,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 106 treesize of output 48 [2022-12-14 07:44:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:44:08,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:44:09,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052892289] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:44:09,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:44:09,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 24] total 34 [2022-12-14 07:44:09,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398648927] [2022-12-14 07:44:09,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:44:09,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 07:44:09,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:44:09,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 07:44:09,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1689, Unknown=5, NotChecked=84, Total=1980 [2022-12-14 07:44:09,570 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 29 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:44:21,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:44:21,982 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-12-14 07:44:21,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 07:44:21,982 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 29 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-12-14 07:44:21,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:44:21,983 INFO L225 Difference]: With dead ends: 69 [2022-12-14 07:44:21,983 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 07:44:21,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 19 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=414, Invalid=3007, Unknown=5, NotChecked=114, Total=3540 [2022-12-14 07:44:21,986 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 109 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:44:21,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 193 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-12-14 07:44:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 07:44:21,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-12-14 07:44:21,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:44:21,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-12-14 07:44:21,995 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2022-12-14 07:44:21,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:44:21,995 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-12-14 07:44:21,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 29 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:44:21,995 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-12-14 07:44:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 07:44:21,995 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:44:21,996 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:44:22,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-14 07:44:22,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 07:44:22,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-12-14 07:44:22,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:44:22,598 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:44:22,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:44:22,599 INFO L85 PathProgramCache]: Analyzing trace with hash -956776499, now seen corresponding path program 5 times [2022-12-14 07:44:22,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:44:22,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [344062021] [2022-12-14 07:44:22,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 07:44:22,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:44:22,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:44:22,602 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:44:22,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 07:44:22,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 07:44:22,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:44:23,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:44:23,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:44:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:44:23,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:44:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:44:25,331 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:44:25,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [344062021] [2022-12-14 07:44:25,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [344062021] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:44:25,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1268157340] [2022-12-14 07:44:25,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 07:44:25,331 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:44:25,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:44:25,332 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:44:25,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 07:44:26,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 07:44:26,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:44:26,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:44:26,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:44:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:44:27,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:44:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:44:27,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1268157340] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:44:27,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866992980] [2022-12-14 07:44:27,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 07:44:27,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:44:27,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:44:27,565 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:44:27,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 07:44:29,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 07:44:29,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:44:29,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:44:29,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:44:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:44:31,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:44:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:44:32,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866992980] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:44:32,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:44:32,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14, 14, 13, 12] total 47 [2022-12-14 07:44:32,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473857246] [2022-12-14 07:44:32,883 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:44:32,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 07:44:32,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:44:32,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 07:44:32,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1632, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 07:44:32,885 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 07:44:34,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:44:34,951 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2022-12-14 07:44:34,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 07:44:34,952 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2022-12-14 07:44:34,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:44:34,953 INFO L225 Difference]: With dead ends: 73 [2022-12-14 07:44:34,953 INFO L226 Difference]: Without dead ends: 67 [2022-12-14 07:44:34,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=718, Invalid=2252, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 07:44:34,955 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 95 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:44:34,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 188 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 07:44:34,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-14 07:44:34,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-12-14 07:44:34,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:44:34,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-12-14 07:44:34,971 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 36 [2022-12-14 07:44:34,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:44:34,971 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-12-14 07:44:34,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 07:44:34,971 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-12-14 07:44:34,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 07:44:34,972 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:44:34,972 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:44:34,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-12-14 07:44:35,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-12-14 07:44:35,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-14 07:44:35,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:44:35,573 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:44:35,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:44:35,573 INFO L85 PathProgramCache]: Analyzing trace with hash -285980785, now seen corresponding path program 6 times [2022-12-14 07:44:35,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:44:35,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834025184] [2022-12-14 07:44:35,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 07:44:35,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:44:35,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:44:35,574 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:44:35,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f688a1-8c5e-441d-baa8-5384e75e4889/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-14 07:44:36,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-14 07:44:36,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:44:36,112 WARN L261 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-14 07:44:36,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:44:36,292 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 10 treesize of output 8 [2022-12-14 07:44:36,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:36,419 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 47 treesize of output 28 [2022-12-14 07:44:36,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:36,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:36,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:36,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 62 treesize of output 48 [2022-12-14 07:44:37,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:37,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:37,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:37,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:37,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:37,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:37,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:37,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:37,963 INFO L321 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2022-12-14 07:44:37,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 97 treesize of output 89 [2022-12-14 07:44:39,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:39,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:39,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:39,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:39,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:39,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:39,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:39,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:39,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:39,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:39,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:39,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:39,071 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-12-14 07:44:39,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 88 treesize of output 93 [2022-12-14 07:44:41,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:41,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:41,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:41,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:41,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:41,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:41,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:44:41,906 INFO L321 Elim1Store]: treesize reduction 851, result has 11.5 percent of original size [2022-12-14 07:44:41,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 12 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 73 case distinctions, treesize of input 183 treesize of output 221 [2022-12-14 07:44:53,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:44:53,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:45:19,005 WARN L233 SmtUtils]: Spent 25.15s on a formula simplification. DAG size of input: 1151 DAG size of output: 595 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 07:45:19,009 INFO L321 Elim1Store]: treesize reduction 4462, result has 38.2 percent of original size [2022-12-14 07:45:19,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 34 select indices, 34 select index equivalence classes, 6 disjoint index pairs (out of 561 index pairs), introduced 34 new quantified variables, introduced 561 case distinctions, treesize of input 436 treesize of output 2916