./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/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_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/pr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/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_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/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 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 --- 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 11:36:06,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:36:06,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:36:06,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:36:06,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:36:06,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:36:06,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:36:06,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:36:06,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:36:06,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:36:06,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:36:06,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:36:06,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:36:06,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:36:06,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:36:06,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:36:06,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:36:06,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:36:06,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:36:06,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:36:06,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:36:06,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:36:06,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:36:06,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:36:06,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:36:06,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:36:06,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:36:06,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:36:06,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:36:06,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:36:06,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:36:06,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:36:06,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:36:06,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:36:06,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:36:06,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:36:06,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:36:06,546 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:36:06,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:36:06,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:36:06,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:36:06,548 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:36:06,570 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:36:06,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:36:06,571 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:36:06,571 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:36:06,571 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:36:06,572 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:36:06,572 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:36:06,572 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:36:06,572 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:36:06,572 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:36:06,573 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:36:06,573 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:36:06,573 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:36:06,573 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:36:06,573 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:36:06,574 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:36:06,574 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:36:06,574 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:36:06,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:36:06,575 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:36:06,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:36:06,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:36:06,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:36:06,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:36:06,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:36:06,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:36:06,576 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:36:06,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:36:06,576 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:36:06,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:36:06,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:36:06,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:36:06,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:36:06,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:36:06,577 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:36:06,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:36:06,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:36:06,577 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:36:06,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:36:06,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:36:06,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:36:06,578 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_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 [2022-12-14 11:36:06,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:36:06,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:36:06,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:36:06,797 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:36:06,797 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:36:06,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-tiling/pr2.c [2022-12-14 11:36:09,288 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:36:09,433 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:36:09,433 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/sv-benchmarks/c/array-tiling/pr2.c [2022-12-14 11:36:09,437 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/data/998a339ba/a3ee88ffe1f540e79d117aff6a3b022c/FLAG9ded3175a [2022-12-14 11:36:09,841 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/data/998a339ba/a3ee88ffe1f540e79d117aff6a3b022c [2022-12-14 11:36:09,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:36:09,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:36:09,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:36:09,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:36:09,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:36:09,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:36:09" (1/1) ... [2022-12-14 11:36:09,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56a93af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:36:09, skipping insertion in model container [2022-12-14 11:36:09,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:36:09" (1/1) ... [2022-12-14 11:36:09,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:36:09,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:36:09,982 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_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/sv-benchmarks/c/array-tiling/pr2.c[394,407] [2022-12-14 11:36:09,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:36:10,001 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:36:10,009 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_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/sv-benchmarks/c/array-tiling/pr2.c[394,407] [2022-12-14 11:36:10,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:36:10,024 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:36:10,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:36:10 WrapperNode [2022-12-14 11:36:10,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:36:10,026 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:36:10,026 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:36:10,026 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:36:10,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:36:10" (1/1) ... [2022-12-14 11:36:10,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:36:10" (1/1) ... [2022-12-14 11:36:10,050 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2022-12-14 11:36:10,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:36:10,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:36:10,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:36:10,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:36:10,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:36:10" (1/1) ... [2022-12-14 11:36:10,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:36:10" (1/1) ... [2022-12-14 11:36:10,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:36:10" (1/1) ... [2022-12-14 11:36:10,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:36:10" (1/1) ... [2022-12-14 11:36:10,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:36:10" (1/1) ... [2022-12-14 11:36:10,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:36:10" (1/1) ... [2022-12-14 11:36:10,066 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:36:10" (1/1) ... [2022-12-14 11:36:10,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:36:10" (1/1) ... [2022-12-14 11:36:10,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:36:10,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:36:10,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:36:10,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:36:10,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:36:10" (1/1) ... [2022-12-14 11:36:10,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:36:10,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:36:10,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:36:10,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:36:10,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:36:10,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:36:10,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 11:36:10,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 11:36:10,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:36:10,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:36:10,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 11:36:10,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 11:36:10,182 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:36:10,184 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:36:10,302 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:36:10,344 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:36:10,344 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 11:36:10,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:36:10 BoogieIcfgContainer [2022-12-14 11:36:10,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:36:10,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:36:10,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:36:10,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:36:10,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:36:09" (1/3) ... [2022-12-14 11:36:10,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9f4bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:36:10, skipping insertion in model container [2022-12-14 11:36:10,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:36:10" (2/3) ... [2022-12-14 11:36:10,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9f4bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:36:10, skipping insertion in model container [2022-12-14 11:36:10,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:36:10" (3/3) ... [2022-12-14 11:36:10,353 INFO L112 eAbstractionObserver]: Analyzing ICFG pr2.c [2022-12-14 11:36:10,367 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:36:10,368 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:36:10,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:36:10,409 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;@28efac01, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:36:10,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:36:10,412 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:10,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 11:36:10,417 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:10,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:10,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:36:10,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1729011113, now seen corresponding path program 1 times [2022-12-14 11:36:10,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:36:10,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850646761] [2022-12-14 11:36:10,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:10,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:36:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:10,758 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 11:36:10,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:36:10,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850646761] [2022-12-14 11:36:10,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850646761] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:36:10,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:36:10,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:36:10,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727509763] [2022-12-14 11:36:10,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:36:10,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:36:10,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:36:10,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:36:10,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:36:10,796 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:10,847 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2022-12-14 11:36:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:36:10,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 11:36:10,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:10,857 INFO L225 Difference]: With dead ends: 24 [2022-12-14 11:36:10,858 INFO L226 Difference]: Without dead ends: 10 [2022-12-14 11:36:10,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:36:10,864 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:10,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:36:10,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-14 11:36:10,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-12-14 11:36:10,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:10,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-12-14 11:36:10,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2022-12-14 11:36:10,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:10,895 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-12-14 11:36:10,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:10,895 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-12-14 11:36:10,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 11:36:10,895 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:10,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:10,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:36:10,896 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:36:10,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:10,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2067009799, now seen corresponding path program 1 times [2022-12-14 11:36:10,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:36:10,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636728908] [2022-12-14 11:36:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:10,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:36:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:11,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:36:11,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636728908] [2022-12-14 11:36:11,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636728908] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:36:11,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292346321] [2022-12-14 11:36:11,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:11,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:11,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:36:11,402 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:36:11,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:36:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:11,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 11:36:11,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:11,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:11,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 39 [2022-12-14 11:36:11,719 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 90 [2022-12-14 11:36:11,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:11,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 11:36:11,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:11,748 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 11:36:11,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 11:36:11,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:11,811 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 23 treesize of output 12 [2022-12-14 11:36:11,828 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 14 treesize of output 11 [2022-12-14 11:36:11,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 11:36:11,843 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 14 treesize of output 11 [2022-12-14 11:36:11,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 11:36:11,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 45 [2022-12-14 11:36:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:12,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:12,092 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:36:12,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:36:12,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:36:12,197 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:36:12,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 92 [2022-12-14 11:36:12,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-12-14 11:36:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:12,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292346321] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:12,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1910093766] [2022-12-14 11:36:12,251 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 11:36:12,251 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:36:12,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:36:12,260 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:36:12,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:36:12,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,321 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:36:12,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:36:12,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,338 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:36:12,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-12-14 11:36:12,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 301 treesize of output 343 [2022-12-14 11:36:12,492 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 198 treesize of output 191 [2022-12-14 11:36:12,509 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 205 treesize of output 209 [2022-12-14 11:36:12,531 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 207 treesize of output 211 [2022-12-14 11:36:12,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:12,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 318 treesize of output 360 [2022-12-14 11:36:12,716 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 3 [2022-12-14 11:36:12,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:12,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 83 [2022-12-14 11:36:12,855 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 3 [2022-12-14 11:36:13,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:13,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:36:13,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:13,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-12-14 11:36:13,084 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:36:13,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:13,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 14 [2022-12-14 11:36:13,124 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 21 treesize of output 7 [2022-12-14 11:36:13,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 119 [2022-12-14 11:36:13,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:13,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:13,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:13,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 86 treesize of output 68 [2022-12-14 11:36:13,177 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 86 treesize of output 68 [2022-12-14 11:36:13,219 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 21 treesize of output 7 [2022-12-14 11:36:13,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:13,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-12-14 11:36:13,309 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:36:13,888 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '120#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite |ULTIMATE.start_main_#t~short9#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (= |ULTIMATE.start_main_#t~mem8#1| 0)) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (not (<= |ULTIMATE.start_main_~MINVAL~0#1| |ULTIMATE.start_main_#t~mem7#1|)) (= |#NULL.base| 0))' at error location [2022-12-14 11:36:13,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:36:13,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:36:13,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2022-12-14 11:36:13,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319932878] [2022-12-14 11:36:13,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:36:13,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 11:36:13,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:36:13,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 11:36:13,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-12-14 11:36:13,891 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:14,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:14,265 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-12-14 11:36:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 11:36:14,265 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 11:36:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:14,266 INFO L225 Difference]: With dead ends: 20 [2022-12-14 11:36:14,266 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 11:36:14,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2022-12-14 11:36:14,267 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 74 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:14,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 14 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:36:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 11:36:14,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2022-12-14 11:36:14,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-12-14 11:36:14,269 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2022-12-14 11:36:14,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:14,269 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-12-14 11:36:14,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:14,270 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-12-14 11:36:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 11:36:14,270 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:14,270 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:14,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:36:14,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:14,472 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:36:14,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:14,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1348076108, now seen corresponding path program 1 times [2022-12-14 11:36:14,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:36:14,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020504116] [2022-12-14 11:36:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:14,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:36:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:14,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:36:14,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020504116] [2022-12-14 11:36:14,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020504116] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:36:14,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118301121] [2022-12-14 11:36:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:14,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:14,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:36:14,779 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:36:14,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:36:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:14,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 11:36:14,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:14,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:36:14,888 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 18 treesize of output 7 [2022-12-14 11:36:14,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:36:14,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 11:36:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:15,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:15,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:36:15,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:36:15,116 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:36:15,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-12-14 11:36:15,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-12-14 11:36:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:15,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118301121] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:15,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1645618782] [2022-12-14 11:36:15,138 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:36:15,138 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:36:15,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:36:15,138 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:36:15,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:36:15,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,182 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:36:15,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:36:15,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,193 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:36:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-12-14 11:36:15,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 368 [2022-12-14 11:36:15,322 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 254 treesize of output 258 [2022-12-14 11:36:15,340 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 256 treesize of output 260 [2022-12-14 11:36:15,355 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 244 treesize of output 237 [2022-12-14 11:36:15,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:15,419 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:36:15,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 51 treesize of output 65 [2022-12-14 11:36:15,455 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 3 [2022-12-14 11:36:15,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 11:36:15,504 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 3 [2022-12-14 11:36:15,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 134 treesize of output 102 [2022-12-14 11:36:15,604 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 62 treesize of output 19 [2022-12-14 11:36:15,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:36:15,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-12-14 11:36:15,720 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:36:15,728 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 21 treesize of output 7 [2022-12-14 11:36:15,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 119 [2022-12-14 11:36:15,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:15,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-12-14 11:36:15,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:15,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-12-14 11:36:15,815 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 33 treesize of output 21 [2022-12-14 11:36:15,821 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 21 treesize of output 7 [2022-12-14 11:36:15,831 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 87 treesize of output 60 [2022-12-14 11:36:15,999 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:36:16,408 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '263#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:36:16,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:36:16,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:36:16,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-12-14 11:36:16,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746962893] [2022-12-14 11:36:16,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:36:16,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 11:36:16,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:36:16,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 11:36:16,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-12-14 11:36:16,410 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:16,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:16,632 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-12-14 11:36:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 11:36:16,633 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 11:36:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:16,633 INFO L225 Difference]: With dead ends: 19 [2022-12-14 11:36:16,633 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 11:36:16,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 11:36:16,634 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 50 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:16,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 24 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:36:16,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 11:36:16,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2022-12-14 11:36:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-12-14 11:36:16,637 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-12-14 11:36:16,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:16,637 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-12-14 11:36:16,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-12-14 11:36:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 11:36:16,638 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:16,638 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:16,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:36:16,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:16,840 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:36:16,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:16,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1698574617, now seen corresponding path program 2 times [2022-12-14 11:36:16,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:36:16,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184061320] [2022-12-14 11:36:16,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:16,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:36:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:17,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:36:17,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184061320] [2022-12-14 11:36:17,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184061320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:36:17,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305543845] [2022-12-14 11:36:17,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:36:17,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:17,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:36:17,028 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:36:17,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:36:17,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 11:36:17,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:36:17,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:36:17,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:17,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:17,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305543845] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:17,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1812259381] [2022-12-14 11:36:17,283 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:36:17,283 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:36:17,284 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:36:17,284 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:36:17,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:36:17,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,320 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:36:17,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:36:17,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,329 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:36:17,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:36:17,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 296 [2022-12-14 11:36:17,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,451 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 194 treesize of output 198 [2022-12-14 11:36:17,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,467 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 196 treesize of output 200 [2022-12-14 11:36:17,481 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 187 treesize of output 185 [2022-12-14 11:36:17,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:36:17,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 62 [2022-12-14 11:36:17,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:36:17,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 58 treesize of output 61 [2022-12-14 11:36:17,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:36:17,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 119 treesize of output 92 [2022-12-14 11:36:17,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:36:17,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:36:17,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:17,936 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 86 treesize of output 68 [2022-12-14 11:36:17,954 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 86 treesize of output 68 [2022-12-14 11:36:17,972 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 21 treesize of output 7 [2022-12-14 11:36:17,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:17,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-12-14 11:36:18,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:18,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-12-14 11:36:18,022 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 33 treesize of output 21 [2022-12-14 11:36:18,028 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 21 treesize of output 7 [2022-12-14 11:36:18,042 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:36:18,056 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 10 treesize of output 3 [2022-12-14 11:36:18,069 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 3 [2022-12-14 11:36:18,241 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:36:18,675 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '430#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:36:18,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:36:18,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:36:18,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-12-14 11:36:18,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831491906] [2022-12-14 11:36:18,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:36:18,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 11:36:18,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:36:18,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 11:36:18,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-12-14 11:36:18,678 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:18,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:18,816 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-12-14 11:36:18,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 11:36:18,816 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 11:36:18,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:18,817 INFO L225 Difference]: With dead ends: 29 [2022-12-14 11:36:18,817 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 11:36:18,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2022-12-14 11:36:18,818 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:18,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:36:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 11:36:18,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-12-14 11:36:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-12-14 11:36:18,821 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2022-12-14 11:36:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:18,821 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-12-14 11:36:18,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-12-14 11:36:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 11:36:18,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:18,822 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:18,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:36:19,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-14 11:36:19,023 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:36:19,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:19,024 INFO L85 PathProgramCache]: Analyzing trace with hash -825002551, now seen corresponding path program 3 times [2022-12-14 11:36:19,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:36:19,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362704401] [2022-12-14 11:36:19,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:19,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:36:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:19,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:36:19,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362704401] [2022-12-14 11:36:19,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362704401] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:36:19,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341024757] [2022-12-14 11:36:19,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:36:19,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:19,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:36:19,362 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:36:19,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:36:19,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:36:19,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:36:19,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 11:36:19,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:19,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:36:19,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 87 [2022-12-14 11:36:19,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 63 treesize of output 93 [2022-12-14 11:36:19,527 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 50 treesize of output 36 [2022-12-14 11:36:19,551 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 50 treesize of output 36 [2022-12-14 11:36:19,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-12-14 11:36:19,568 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 24 treesize of output 13 [2022-12-14 11:36:19,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-12-14 11:36:19,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:36:19,585 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 23 treesize of output 22 [2022-12-14 11:36:19,591 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 23 treesize of output 22 [2022-12-14 11:36:19,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-12-14 11:36:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:19,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:19,878 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:36:19,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:36:19,923 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 132 treesize of output 113 [2022-12-14 11:36:19,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:36:19,934 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:36:19,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 54 [2022-12-14 11:36:19,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-12-14 11:36:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:19,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341024757] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:19,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796946741] [2022-12-14 11:36:19,990 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:36:19,990 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:36:19,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:36:19,990 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:36:19,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:36:20,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:20,021 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:36:20,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:36:20,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:20,030 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:36:20,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:20,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-12-14 11:36:20,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:20,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:20,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 233 [2022-12-14 11:36:20,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:20,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:20,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:20,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:20,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 113 [2022-12-14 11:36:20,203 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 62 treesize of output 19 [2022-12-14 11:36:20,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:20,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:20,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:20,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:20,222 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 180 treesize of output 140 [2022-12-14 11:36:20,233 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 56 treesize of output 17 [2022-12-14 11:36:20,244 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 21 treesize of output 7 [2022-12-14 11:36:20,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:20,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 212 [2022-12-14 11:36:20,306 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:36:20,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:20,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:36:20,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:36:20,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:20,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:20,411 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 86 treesize of output 70 [2022-12-14 11:36:20,420 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 62 treesize of output 19 [2022-12-14 11:36:20,430 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 86 treesize of output 70 [2022-12-14 11:36:20,440 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 62 treesize of output 19 [2022-12-14 11:36:20,471 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 21 treesize of output 7 [2022-12-14 11:36:20,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:20,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-12-14 11:36:20,490 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 54 treesize of output 40 [2022-12-14 11:36:20,495 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 40 treesize of output 19 [2022-12-14 11:36:20,507 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:36:20,524 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 3 [2022-12-14 11:36:20,532 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 3 [2022-12-14 11:36:20,678 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:36:21,156 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '617#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:36:21,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:36:21,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:36:21,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-12-14 11:36:21,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112147993] [2022-12-14 11:36:21,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:36:21,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 11:36:21,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:36:21,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 11:36:21,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-12-14 11:36:21,158 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:21,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:21,647 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-12-14 11:36:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 11:36:21,647 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 11:36:21,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:21,647 INFO L225 Difference]: With dead ends: 24 [2022-12-14 11:36:21,648 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 11:36:21,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 11:36:21,648 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 58 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:21,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 37 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:36:21,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 11:36:21,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2022-12-14 11:36:21,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:21,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-12-14 11:36:21,652 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2022-12-14 11:36:21,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:21,653 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-12-14 11:36:21,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:21,653 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-12-14 11:36:21,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 11:36:21,653 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:21,653 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:21,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 11:36:21,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:21,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:36:21,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:21,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1842852278, now seen corresponding path program 4 times [2022-12-14 11:36:21,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:36:21,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517395570] [2022-12-14 11:36:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:21,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:36:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:22,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:36:22,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517395570] [2022-12-14 11:36:22,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517395570] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:36:22,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729507407] [2022-12-14 11:36:22,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:36:22,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:22,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:36:22,234 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:36:22,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:36:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:22,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 11:36:22,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:22,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:36:22,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-12-14 11:36:22,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:36:22,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 11:36:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:22,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:22,614 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:36:22,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:36:22,636 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:36:22,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 35 [2022-12-14 11:36:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:22,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729507407] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:22,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [496304523] [2022-12-14 11:36:22,664 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:36:22,664 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:36:22,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:36:22,664 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:36:22,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:36:22,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:22,688 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:36:22,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:36:22,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:22,696 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:36:22,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:22,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:36:22,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:22,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:22,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:22,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 212 [2022-12-14 11:36:22,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:22,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:36:22,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:22,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:22,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:22,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 489 treesize of output 524 [2022-12-14 11:36:22,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:22,868 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 428 treesize of output 430 [2022-12-14 11:36:22,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:22,884 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 415 treesize of output 417 [2022-12-14 11:36:22,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:22,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:36:22,957 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 11 treesize of output 7 [2022-12-14 11:36:22,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:22,969 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 13 treesize of output 7 [2022-12-14 11:36:22,988 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 11:36:23,007 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 11:36:23,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 87 [2022-12-14 11:36:23,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:36:23,054 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 33 treesize of output 11 [2022-12-14 11:36:23,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:36:23,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 87 [2022-12-14 11:36:23,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:36:23,092 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 33 treesize of output 11 [2022-12-14 11:36:23,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 314 [2022-12-14 11:36:23,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,233 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 13 treesize of output 7 [2022-12-14 11:36:23,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 30 [2022-12-14 11:36:23,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:36:23,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:36:23,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:23,378 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 62 treesize of output 19 [2022-12-14 11:36:23,401 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 62 treesize of output 19 [2022-12-14 11:36:23,428 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 21 treesize of output 7 [2022-12-14 11:36:23,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 242 [2022-12-14 11:36:23,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:23,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:23,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:36:23,528 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 43 treesize of output 19 [2022-12-14 11:36:23,564 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 21 treesize of output 7 [2022-12-14 11:36:23,580 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 136 [2022-12-14 11:36:23,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-12-14 11:36:23,623 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 21 treesize of output 7 [2022-12-14 11:36:23,786 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:36:24,259 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '836#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:36:24,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:36:24,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:36:24,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-12-14 11:36:24,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176602324] [2022-12-14 11:36:24,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:36:24,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 11:36:24,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:36:24,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 11:36:24,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 11:36:24,260 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:24,754 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-12-14 11:36:24,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 11:36:24,755 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 11:36:24,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:24,756 INFO L225 Difference]: With dead ends: 29 [2022-12-14 11:36:24,756 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 11:36:24,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=351, Invalid=2199, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 11:36:24,758 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 77 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:24,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 54 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:36:24,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 11:36:24,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-12-14 11:36:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-12-14 11:36:24,763 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2022-12-14 11:36:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:24,763 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-12-14 11:36:24,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:24,764 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-12-14 11:36:24,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 11:36:24,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:24,764 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:24,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:36:24,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 11:36:24,966 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:36:24,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:24,967 INFO L85 PathProgramCache]: Analyzing trace with hash -2134959575, now seen corresponding path program 5 times [2022-12-14 11:36:24,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:36:24,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268699788] [2022-12-14 11:36:24,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:24,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:36:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:25,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:36:25,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268699788] [2022-12-14 11:36:25,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268699788] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:36:25,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939144413] [2022-12-14 11:36:25,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:36:25,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:25,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:36:25,236 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:36:25,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:36:25,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 11:36:25,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:36:25,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:36:25,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:25,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:25,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939144413] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:25,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [450414584] [2022-12-14 11:36:25,587 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:36:25,587 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:36:25,587 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:36:25,588 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:36:25,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:36:25,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:25,618 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:36:25,618 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 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 11:36:25,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:25,644 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:36:25,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:36:25,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:25,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:36:25,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:25,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:25,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:25,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 286 [2022-12-14 11:36:25,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:25,757 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 173 treesize of output 177 [2022-12-14 11:36:25,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:25,773 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 175 treesize of output 179 [2022-12-14 11:36:25,787 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 166 treesize of output 164 [2022-12-14 11:36:25,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:25,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:25,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:36:25,848 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:36:25,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:25,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:25,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:25,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:25,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:25,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:25,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 85 [2022-12-14 11:36:26,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:26,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:36:26,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:26,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-12-14 11:36:26,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:26,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-12-14 11:36:26,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:26,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-12-14 11:36:26,089 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 21 treesize of output 7 [2022-12-14 11:36:26,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 175 [2022-12-14 11:36:26,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:26,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:26,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 153 treesize of output 173 [2022-12-14 11:36:26,201 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:36:26,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:26,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:26,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:26,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 8 [2022-12-14 11:36:26,249 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 21 treesize of output 7 [2022-12-14 11:36:26,264 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 56 treesize of output 17 [2022-12-14 11:36:26,271 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 21 treesize of output 7 [2022-12-14 11:36:26,429 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:36:26,877 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1095#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:36:26,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:36:26,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:36:26,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-12-14 11:36:26,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552274717] [2022-12-14 11:36:26,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:36:26,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 11:36:26,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:36:26,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 11:36:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 11:36:26,879 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:27,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:27,048 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-12-14 11:36:27,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 11:36:27,048 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 11:36:27,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:27,049 INFO L225 Difference]: With dead ends: 41 [2022-12-14 11:36:27,049 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 11:36:27,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=328, Invalid=1394, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 11:36:27,049 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:27,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 55 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:36:27,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 11:36:27,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 11:36:27,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:27,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-12-14 11:36:27,054 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2022-12-14 11:36:27,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:27,054 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-12-14 11:36:27,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:27,055 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-12-14 11:36:27,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 11:36:27,055 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:27,055 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:27,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:36:27,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:27,257 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:36:27,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:27,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2138067207, now seen corresponding path program 6 times [2022-12-14 11:36:27,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:36:27,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499149534] [2022-12-14 11:36:27,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:27,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:36:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:27,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:36:27,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499149534] [2022-12-14 11:36:27,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499149534] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:36:27,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105435915] [2022-12-14 11:36:27,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:36:27,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:27,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:36:27,689 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:36:27,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:36:27,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:36:27,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:36:27,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 11:36:27,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:27,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:36:27,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2022-12-14 11:36:27,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 7 [2022-12-14 11:36:27,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 122 [2022-12-14 11:36:27,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 58 [2022-12-14 11:36:27,939 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 68 treesize of output 50 [2022-12-14 11:36:27,953 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 68 treesize of output 50 [2022-12-14 11:36:27,964 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 26 treesize of output 16 [2022-12-14 11:36:27,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:36:27,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-12-14 11:36:28,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-12-14 11:36:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:28,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:28,439 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:36:28,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:36:28,472 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 78 treesize of output 63 [2022-12-14 11:36:28,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:36:28,479 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:36:28,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 37 [2022-12-14 11:36:28,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-12-14 11:36:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:28,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105435915] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:28,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1655790593] [2022-12-14 11:36:28,543 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:36:28,544 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:36:28,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:36:28,544 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:36:28,544 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:36:28,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,572 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:36:28,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:36:28,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,580 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:36:28,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:36:28,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 221 [2022-12-14 11:36:28,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:36:28,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 191 treesize of output 143 [2022-12-14 11:36:28,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 191 treesize of output 143 [2022-12-14 11:36:28,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 196 [2022-12-14 11:36:28,830 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:36:28,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,851 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 13 treesize of output 7 [2022-12-14 11:36:28,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:36:28,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-12-14 11:36:28,927 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 21 treesize of output 7 [2022-12-14 11:36:28,934 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:36:28,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 119 [2022-12-14 11:36:28,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:28,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:28,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 17 treesize of output 8 [2022-12-14 11:36:28,987 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 62 treesize of output 19 [2022-12-14 11:36:29,004 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 56 treesize of output 17 [2022-12-14 11:36:29,009 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 21 treesize of output 7 [2022-12-14 11:36:29,169 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:36:29,814 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1364#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:36:29,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:36:29,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:36:29,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-12-14 11:36:29,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460876433] [2022-12-14 11:36:29,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:36:29,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 11:36:29,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:36:29,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 11:36:29,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1352, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 11:36:29,816 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:31,187 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-12-14 11:36:31,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 11:36:31,187 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 11:36:31,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:31,187 INFO L225 Difference]: With dead ends: 34 [2022-12-14 11:36:31,188 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 11:36:31,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=360, Invalid=3062, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 11:36:31,188 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 74 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:31,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 97 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:36:31,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 11:36:31,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-12-14 11:36:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-12-14 11:36:31,194 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2022-12-14 11:36:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:31,195 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-12-14 11:36:31,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-12-14 11:36:31,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 11:36:31,195 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:31,196 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:31,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:36:31,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:31,397 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:36:31,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:31,398 INFO L85 PathProgramCache]: Analyzing trace with hash 800440908, now seen corresponding path program 7 times [2022-12-14 11:36:31,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:36:31,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142723825] [2022-12-14 11:36:31,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:31,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:36:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:31,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:36:31,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142723825] [2022-12-14 11:36:31,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142723825] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:36:31,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909819189] [2022-12-14 11:36:31,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:36:31,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:31,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:36:31,789 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:36:31,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:36:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:31,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 11:36:31,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:31,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:36:31,926 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 18 treesize of output 7 [2022-12-14 11:36:31,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:36:32,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 11:36:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:32,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:32,357 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:36:32,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:36:32,370 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 54 treesize of output 39 [2022-12-14 11:36:32,375 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:36:32,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-12-14 11:36:32,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-12-14 11:36:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:32,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909819189] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:32,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [94321243] [2022-12-14 11:36:32,423 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:36:32,423 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:36:32,423 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:36:32,423 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:36:32,423 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:36:32,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,450 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:36:32,450 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 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 11:36:32,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,472 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:36:32,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:36:32,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:36:32,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 261 [2022-12-14 11:36:32,564 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 120 treesize of output 118 [2022-12-14 11:36:32,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,577 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 129 treesize of output 133 [2022-12-14 11:36:32,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,591 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 131 treesize of output 135 [2022-12-14 11:36:32,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:36:32,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 83 [2022-12-14 11:36:32,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 14 [2022-12-14 11:36:32,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 83 [2022-12-14 11:36:32,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 14 [2022-12-14 11:36:32,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2022-12-14 11:36:32,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,750 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 13 treesize of output 7 [2022-12-14 11:36:32,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:36:32,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:36:32,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:32,898 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 86 treesize of output 68 [2022-12-14 11:36:32,913 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 86 treesize of output 68 [2022-12-14 11:36:32,932 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 21 treesize of output 7 [2022-12-14 11:36:32,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-12-14 11:36:32,960 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 3 [2022-12-14 11:36:32,969 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 3 [2022-12-14 11:36:32,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:32,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-12-14 11:36:32,987 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 42 treesize of output 30 [2022-12-14 11:36:32,992 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 30 treesize of output 16 [2022-12-14 11:36:33,002 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:36:33,146 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:36:33,699 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1676#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:36:33,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:36:33,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:36:33,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 36 [2022-12-14 11:36:33,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193988475] [2022-12-14 11:36:33,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:36:33,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 11:36:33,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:36:33,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 11:36:33,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1663, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 11:36:33,701 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:35,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:35,596 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-12-14 11:36:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 11:36:35,596 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 11:36:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:35,596 INFO L225 Difference]: With dead ends: 55 [2022-12-14 11:36:35,596 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 11:36:35,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=675, Invalid=5331, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 11:36:35,598 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 207 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:35,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 95 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:36:35,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 11:36:35,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 29. [2022-12-14 11:36:35,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-12-14 11:36:35,605 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2022-12-14 11:36:35,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:35,605 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-12-14 11:36:35,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-12-14 11:36:35,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 11:36:35,606 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:35,606 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:35,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 11:36:35,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:35,808 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:36:35,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:35,809 INFO L85 PathProgramCache]: Analyzing trace with hash 281939687, now seen corresponding path program 8 times [2022-12-14 11:36:35,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:36:35,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869637384] [2022-12-14 11:36:35,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:35,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:36:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 41 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:36,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:36:36,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869637384] [2022-12-14 11:36:36,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869637384] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:36:36,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783365261] [2022-12-14 11:36:36,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:36:36,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:36,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:36:36,192 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:36:36,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:36:36,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 11:36:36,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:36:36,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:36:36,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:36,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:36,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783365261] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:36,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [196217641] [2022-12-14 11:36:36,805 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:36:36,805 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:36:36,806 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:36:36,806 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:36:36,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:36:36,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:36,837 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:36:36,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:36:36,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:36,846 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:36:36,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:36,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-12-14 11:36:36,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:36,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:36,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:36,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 238 [2022-12-14 11:36:36,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:36,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:36,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:36,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:36,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:36,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 107 [2022-12-14 11:36:37,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:37,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:37,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:37,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:37,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:37,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 145 [2022-12-14 11:36:37,047 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 21 treesize of output 7 [2022-12-14 11:36:37,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:37,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 212 [2022-12-14 11:36:37,086 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:36:37,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:37,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:36:37,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:36:37,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:37,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:37,234 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 33 treesize of output 21 [2022-12-14 11:36:37,241 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 21 treesize of output 7 [2022-12-14 11:36:37,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:37,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 65 treesize of output 51 [2022-12-14 11:36:37,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:37,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2022-12-14 11:36:37,277 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 3 [2022-12-14 11:36:37,287 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 10 treesize of output 3 [2022-12-14 11:36:37,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:37,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-12-14 11:36:37,309 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:36:37,319 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 33 treesize of output 21 [2022-12-14 11:36:37,325 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 21 treesize of output 7 [2022-12-14 11:36:37,486 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:36:38,079 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2071#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:36:38,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:36:38,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:36:38,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 37 [2022-12-14 11:36:38,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419972086] [2022-12-14 11:36:38,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:36:38,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 11:36:38,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:36:38,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 11:36:38,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1554, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 11:36:38,082 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:38,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:38,392 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2022-12-14 11:36:38,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 11:36:38,392 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-14 11:36:38,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:38,393 INFO L225 Difference]: With dead ends: 54 [2022-12-14 11:36:38,393 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 11:36:38,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=557, Invalid=2305, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 11:36:38,395 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:38,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 70 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:36:38,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 11:36:38,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-14 11:36:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-12-14 11:36:38,403 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2022-12-14 11:36:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:38,403 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-12-14 11:36:38,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:38,404 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-12-14 11:36:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 11:36:38,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:38,404 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:38,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 11:36:38,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 11:36:38,604 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:36:38,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:38,605 INFO L85 PathProgramCache]: Analyzing trace with hash -306642359, now seen corresponding path program 9 times [2022-12-14 11:36:38,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:36:38,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491822238] [2022-12-14 11:36:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:38,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:36:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:39,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:36:39,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491822238] [2022-12-14 11:36:39,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491822238] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:36:39,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530822735] [2022-12-14 11:36:39,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:36:39,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:39,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:36:39,149 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:36:39,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 11:36:39,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:36:39,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:36:39,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 11:36:39,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:39,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:36:39,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2022-12-14 11:36:39,366 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 24 treesize of output 7 [2022-12-14 11:36:39,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 115 [2022-12-14 11:36:39,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 58 [2022-12-14 11:36:39,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 25 treesize of output 25 [2022-12-14 11:36:39,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 25 treesize of output 25 [2022-12-14 11:36:39,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:39,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 25 treesize of output 25 [2022-12-14 11:36:39,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:36:39,467 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 36 treesize of output 24 [2022-12-14 11:36:39,470 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 24 treesize of output 13 [2022-12-14 11:36:39,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-12-14 11:36:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:39,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:40,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:36:40,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:36:40,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:36:40,146 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:36:40,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 88 [2022-12-14 11:36:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:40,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530822735] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:40,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1265042531] [2022-12-14 11:36:40,257 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:36:40,257 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:36:40,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:36:40,257 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:36:40,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:36:40,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,289 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:36:40,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:36:40,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,297 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:36:40,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-12-14 11:36:40,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 235 [2022-12-14 11:36:40,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:40,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 599 treesize of output 628 [2022-12-14 11:36:40,491 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 535 treesize of output 534 [2022-12-14 11:36:40,507 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 513 treesize of output 512 [2022-12-14 11:36:40,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:40,576 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 19 treesize of output 12 [2022-12-14 11:36:40,598 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 19 treesize of output 12 [2022-12-14 11:36:40,619 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 21 treesize of output 7 [2022-12-14 11:36:40,642 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 10 [2022-12-14 11:36:40,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:36:40,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 104 [2022-12-14 11:36:40,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 104 [2022-12-14 11:36:40,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:36:40,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-12-14 11:36:40,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-12-14 11:36:40,952 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 21 treesize of output 7 [2022-12-14 11:36:40,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 177 [2022-12-14 11:36:40,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:40,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:40,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 67 [2022-12-14 11:36:40,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:36:40,991 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 43 treesize of output 19 [2022-12-14 11:36:41,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 67 [2022-12-14 11:36:41,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:36:41,014 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 43 treesize of output 19 [2022-12-14 11:36:41,058 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 111 [2022-12-14 11:36:41,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-12-14 11:36:41,078 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 21 treesize of output 7 [2022-12-14 11:36:41,214 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:36:41,842 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2423#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:36:41,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:36:41,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:36:41,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 41 [2022-12-14 11:36:41,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808509220] [2022-12-14 11:36:41,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:36:41,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 11:36:41,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:36:41,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 11:36:41,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2095, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 11:36:41,844 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:44,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:44,780 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-12-14 11:36:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 11:36:44,780 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-14 11:36:44,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:44,781 INFO L225 Difference]: With dead ends: 63 [2022-12-14 11:36:44,781 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 11:36:44,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=709, Invalid=6947, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 11:36:44,782 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 141 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:44,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 130 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:36:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 11:36:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 33. [2022-12-14 11:36:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:44,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-12-14 11:36:44,792 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2022-12-14 11:36:44,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:44,792 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-12-14 11:36:44,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:44,792 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-12-14 11:36:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 11:36:44,792 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:44,792 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:44,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 11:36:44,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:44,993 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:36:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:44,994 INFO L85 PathProgramCache]: Analyzing trace with hash 218198474, now seen corresponding path program 10 times [2022-12-14 11:36:44,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:36:44,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824758517] [2022-12-14 11:36:44,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:44,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:36:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:45,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:36:45,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824758517] [2022-12-14 11:36:45,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824758517] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:36:45,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016233429] [2022-12-14 11:36:45,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:36:45,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:45,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:36:45,522 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:36:45,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 11:36:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:45,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 11:36:45,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:45,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:36:45,694 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 18 treesize of output 7 [2022-12-14 11:36:45,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:36:46,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 11:36:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:46,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:46,450 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:36:46,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:36:46,469 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 50 treesize of output 34 [2022-12-14 11:36:46,473 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:36:46,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 14 [2022-12-14 11:36:46,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-12-14 11:36:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:46,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016233429] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:46,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1989154211] [2022-12-14 11:36:46,568 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:36:46,569 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:36:46,569 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:36:46,569 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:36:46,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:36:46,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,598 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:36:46,599 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 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 11:36:46,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,623 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:36:46,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:36:46,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-12-14 11:36:46,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 273 treesize of output 323 [2022-12-14 11:36:46,710 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 191 treesize of output 195 [2022-12-14 11:36:46,725 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 193 treesize of output 197 [2022-12-14 11:36:46,740 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 181 treesize of output 174 [2022-12-14 11:36:46,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:46,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 65 [2022-12-14 11:36:46,856 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 3 [2022-12-14 11:36:46,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:46,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-12-14 11:36:46,894 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 3 [2022-12-14 11:36:46,903 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 3 [2022-12-14 11:36:47,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:47,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:36:47,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:47,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-12-14 11:36:47,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:36:47,074 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 46 treesize of output 14 [2022-12-14 11:36:47,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:36:47,085 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 46 treesize of output 14 [2022-12-14 11:36:47,102 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 21 treesize of output 7 [2022-12-14 11:36:47,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 177 [2022-12-14 11:36:47,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:47,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:47,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 184 [2022-12-14 11:36:47,180 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 62 treesize of output 19 [2022-12-14 11:36:47,209 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 78 treesize of output 62 [2022-12-14 11:36:47,217 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 62 treesize of output 19 [2022-12-14 11:36:47,239 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:36:47,246 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 21 treesize of output 7 [2022-12-14 11:36:47,404 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:36:48,152 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2878#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:36:48,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:36:48,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:36:48,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 45 [2022-12-14 11:36:48,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753153976] [2022-12-14 11:36:48,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:36:48,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 11:36:48,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:36:48,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 11:36:48,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2478, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 11:36:48,155 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:52,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:52,581 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2022-12-14 11:36:52,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-14 11:36:52,581 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-12-14 11:36:52,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:52,581 INFO L225 Difference]: With dead ends: 90 [2022-12-14 11:36:52,581 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 11:36:52,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2657 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1190, Invalid=11020, Unknown=0, NotChecked=0, Total=12210 [2022-12-14 11:36:52,583 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 334 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:52,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 135 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 11:36:52,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 11:36:52,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 36. [2022-12-14 11:36:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-12-14 11:36:52,595 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2022-12-14 11:36:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:52,595 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-12-14 11:36:52,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:52,595 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-12-14 11:36:52,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 11:36:52,596 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:52,596 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:52,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 11:36:52,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 11:36:52,797 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:36:52,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:52,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2070496937, now seen corresponding path program 11 times [2022-12-14 11:36:52,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:36:52,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929474166] [2022-12-14 11:36:52,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:52,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:36:52,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:53,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:36:53,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929474166] [2022-12-14 11:36:53,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929474166] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:36:53,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101890610] [2022-12-14 11:36:53,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:36:53,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:53,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:36:53,253 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:36:53,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 11:36:53,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 11:36:53,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:36:53,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 11:36:53,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 100 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:53,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 100 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:54,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101890610] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:54,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1205075251] [2022-12-14 11:36:54,153 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:36:54,153 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:36:54,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:36:54,154 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:36:54,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:36:54,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,189 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:36:54,189 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 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 11:36:54,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,222 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:36:54,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:36:54,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-12-14 11:36:54,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 233 [2022-12-14 11:36:54,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:54,317 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:36:54,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 69 [2022-12-14 11:36:54,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 212 [2022-12-14 11:36:54,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 106 [2022-12-14 11:36:54,458 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 21 treesize of output 7 [2022-12-14 11:36:54,485 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 21 treesize of output 7 [2022-12-14 11:36:54,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:36:54,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-12-14 11:36:54,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 14 [2022-12-14 11:36:54,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 14 [2022-12-14 11:36:54,564 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 21 treesize of output 7 [2022-12-14 11:36:54,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 177 [2022-12-14 11:36:54,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:54,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 165 [2022-12-14 11:36:54,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:54,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2022-12-14 11:36:54,663 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:36:54,674 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 21 treesize of output 7 [2022-12-14 11:36:54,682 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 21 treesize of output 7 [2022-12-14 11:36:54,820 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:36:55,299 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3431#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:36:55,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:36:55,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:36:55,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 45 [2022-12-14 11:36:55,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773132001] [2022-12-14 11:36:55,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:36:55,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 11:36:55,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:36:55,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 11:36:55,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2175, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 11:36:55,301 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:55,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:55,590 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2022-12-14 11:36:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 11:36:55,590 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-12-14 11:36:55,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:55,590 INFO L225 Difference]: With dead ends: 67 [2022-12-14 11:36:55,590 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 11:36:55,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=776, Invalid=3256, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 11:36:55,592 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:55,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 83 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:36:55,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 11:36:55,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-12-14 11:36:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-12-14 11:36:55,604 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2022-12-14 11:36:55,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:55,604 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-12-14 11:36:55,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:55,604 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-12-14 11:36:55,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 11:36:55,605 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:55,605 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:55,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 11:36:55,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 11:36:55,806 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:36:55,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:55,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1526062841, now seen corresponding path program 12 times [2022-12-14 11:36:55,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:36:55,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615830609] [2022-12-14 11:36:55,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:55,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:36:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:56,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:36:56,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615830609] [2022-12-14 11:36:56,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615830609] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:36:56,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885081002] [2022-12-14 11:36:56,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:36:56,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:56,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:36:56,475 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:36:56,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 11:36:56,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:36:56,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:36:56,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-14 11:36:56,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:56,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:36:56,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2022-12-14 11:36:56,734 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 24 treesize of output 7 [2022-12-14 11:36:56,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 115 [2022-12-14 11:36:56,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 58 [2022-12-14 11:36:56,763 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 24 treesize of output 13 [2022-12-14 11:36:56,786 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 24 treesize of output 13 [2022-12-14 11:36:56,801 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 24 treesize of output 13 [2022-12-14 11:36:56,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 58 treesize of output 60 [2022-12-14 11:36:56,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2022-12-14 11:36:56,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:36:57,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-12-14 11:36:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:57,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:57,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:36:57,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:36:58,006 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 132 treesize of output 113 [2022-12-14 11:36:58,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:36:58,014 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:36:58,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 54 [2022-12-14 11:36:58,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-12-14 11:36:58,161 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:58,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885081002] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:58,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1578956205] [2022-12-14 11:36:58,163 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:36:58,163 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:36:58,163 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:36:58,163 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:36:58,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:36:58,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,190 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:36:58,191 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 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 11:36:58,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,218 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:36:58,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:36:58,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:36:58,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 208 [2022-12-14 11:36:58,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:36:58,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 355 treesize of output 408 [2022-12-14 11:36:58,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,387 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 272 [2022-12-14 11:36:58,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:36:58,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,503 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 13 treesize of output 7 [2022-12-14 11:36:58,516 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 11 treesize of output 7 [2022-12-14 11:36:58,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 365 treesize of output 454 [2022-12-14 11:36:58,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 343 [2022-12-14 11:36:58,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-12-14 11:36:58,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 129 [2022-12-14 11:36:58,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 117 treesize of output 83 [2022-12-14 11:36:58,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 11 [2022-12-14 11:36:58,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:36:58,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:36:58,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:58,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:36:58,956 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 86 treesize of output 68 [2022-12-14 11:36:58,974 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 86 treesize of output 68 [2022-12-14 11:36:58,988 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 33 treesize of output 21 [2022-12-14 11:36:58,993 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 21 treesize of output 7 [2022-12-14 11:36:59,004 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:36:59,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:59,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-12-14 11:36:59,020 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 33 treesize of output 21 [2022-12-14 11:36:59,025 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 21 treesize of output 7 [2022-12-14 11:36:59,033 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 21 treesize of output 7 [2022-12-14 11:36:59,042 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 3 [2022-12-14 11:36:59,186 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:36:59,790 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3866#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:36:59,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:36:59,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:36:59,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 50 [2022-12-14 11:36:59,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405150527] [2022-12-14 11:36:59,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:36:59,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 11:36:59,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:36:59,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 11:36:59,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3000, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 11:36:59,791 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:05,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:37:05,763 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2022-12-14 11:37:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-14 11:37:05,763 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-14 11:37:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:37:05,764 INFO L225 Difference]: With dead ends: 101 [2022-12-14 11:37:05,764 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 11:37:05,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3410 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1224, Invalid=13782, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 11:37:05,766 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 208 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:37:05,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 242 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 11:37:05,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 11:37:05,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 40. [2022-12-14 11:37:05,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-12-14 11:37:05,781 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2022-12-14 11:37:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:37:05,781 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-12-14 11:37:05,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-12-14 11:37:05,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 11:37:05,782 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:37:05,782 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 11:37:05,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 11:37:05,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:05,983 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:37:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:37:05,984 INFO L85 PathProgramCache]: Analyzing trace with hash -703991220, now seen corresponding path program 13 times [2022-12-14 11:37:05,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:37:05,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355264750] [2022-12-14 11:37:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:05,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:37:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:37:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:06,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:37:06,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355264750] [2022-12-14 11:37:06,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355264750] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:37:06,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495038840] [2022-12-14 11:37:06,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:37:06,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:06,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:37:06,532 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:37:06,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 11:37:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:37:06,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 11:37:06,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:37:06,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:37:06,763 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 18 treesize of output 7 [2022-12-14 11:37:06,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:37:07,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 11:37:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:07,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:37:07,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:37:07,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:37:07,827 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:37:07,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 35 [2022-12-14 11:37:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:07,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495038840] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:37:07,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1143168029] [2022-12-14 11:37:07,983 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:37:07,983 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:37:07,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:37:07,983 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:37:07,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:37:07,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,020 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:37:08,020 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 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 11:37:08,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,051 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:37:08,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:37:08,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:37:08,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 281 [2022-12-14 11:37:08,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,147 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 152 treesize of output 156 [2022-12-14 11:37:08,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,168 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 154 treesize of output 158 [2022-12-14 11:37:08,183 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 145 treesize of output 143 [2022-12-14 11:37:08,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:37:08,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 292 [2022-12-14 11:37:08,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:37:08,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,438 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 282 [2022-12-14 11:37:08,448 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 265 treesize of output 261 [2022-12-14 11:37:08,458 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 261 treesize of output 257 [2022-12-14 11:37:08,521 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 11:37:08,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:37:08,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:37:08,542 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:37:08,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:37:08,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-12-14 11:37:08,610 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 56 treesize of output 17 [2022-12-14 11:37:08,620 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 56 treesize of output 17 [2022-12-14 11:37:08,628 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 21 treesize of output 7 [2022-12-14 11:37:08,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 177 [2022-12-14 11:37:08,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:37:08,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-12-14 11:37:08,726 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 21 treesize of output 7 [2022-12-14 11:37:08,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:08,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 18 treesize of output 1 [2022-12-14 11:37:08,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:37:08,747 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 52 treesize of output 16 [2022-12-14 11:37:08,753 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:37:08,885 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:37:09,618 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4488#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:37:09,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:37:09,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:37:09,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 54 [2022-12-14 11:37:09,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950248409] [2022-12-14 11:37:09,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:37:09,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 11:37:09,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:37:09,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 11:37:09,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=3455, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 11:37:09,619 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 54 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:17,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:37:17,661 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2022-12-14 11:37:17,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-12-14 11:37:17,662 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 54 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-12-14 11:37:17,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:37:17,662 INFO L225 Difference]: With dead ends: 134 [2022-12-14 11:37:17,662 INFO L226 Difference]: Without dead ends: 132 [2022-12-14 11:37:17,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5368 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1890, Invalid=20460, Unknown=0, NotChecked=0, Total=22350 [2022-12-14 11:37:17,664 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 495 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:37:17,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 206 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 11:37:17,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-12-14 11:37:17,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 43. [2022-12-14 11:37:17,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:17,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-12-14 11:37:17,683 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2022-12-14 11:37:17,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:37:17,683 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-12-14 11:37:17,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 54 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:17,683 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-12-14 11:37:17,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 11:37:17,683 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:37:17,683 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 11:37:17,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 11:37:17,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 11:37:17,885 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:37:17,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:37:17,886 INFO L85 PathProgramCache]: Analyzing trace with hash -271851801, now seen corresponding path program 14 times [2022-12-14 11:37:17,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:37:17,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057723089] [2022-12-14 11:37:17,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:17,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:37:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:37:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 127 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:18,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:37:18,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057723089] [2022-12-14 11:37:18,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057723089] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:37:18,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230869289] [2022-12-14 11:37:18,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:37:18,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:18,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:37:18,366 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:37:18,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 11:37:18,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 11:37:18,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:37:18,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:37:18,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:37:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 155 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:19,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:37:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 155 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:19,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230869289] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:37:19,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [150865800] [2022-12-14 11:37:19,700 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:37:19,700 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:37:19,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:37:19,700 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:37:19,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:37:19,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,737 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:37:19,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:37:19,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,746 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:37:19,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-12-14 11:37:19,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 237 [2022-12-14 11:37:19,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:37:19,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 49 [2022-12-14 11:37:19,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-12-14 11:37:19,892 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 21 treesize of output 7 [2022-12-14 11:37:19,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 69 [2022-12-14 11:37:19,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:19,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 212 [2022-12-14 11:37:19,969 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:37:20,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:20,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:37:20,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:20,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-12-14 11:37:20,096 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 21 treesize of output 7 [2022-12-14 11:37:20,107 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:37:20,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 119 [2022-12-14 11:37:20,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:20,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:37:20,155 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 62 treesize of output 19 [2022-12-14 11:37:20,174 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 62 treesize of output 19 [2022-12-14 11:37:20,185 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 75 treesize of output 50 [2022-12-14 11:37:20,198 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 33 treesize of output 21 [2022-12-14 11:37:20,205 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 21 treesize of output 7 [2022-12-14 11:37:20,358 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:37:21,038 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5225#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:37:21,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:37:21,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:37:21,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 55 [2022-12-14 11:37:21,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168863539] [2022-12-14 11:37:21,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:37:21,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 11:37:21,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:37:21,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 11:37:21,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=3086, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 11:37:21,040 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 55 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:21,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:37:21,520 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2022-12-14 11:37:21,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 11:37:21,520 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 55 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-12-14 11:37:21,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:37:21,520 INFO L225 Difference]: With dead ends: 80 [2022-12-14 11:37:21,521 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 11:37:21,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1115, Invalid=4585, Unknown=0, NotChecked=0, Total=5700 [2022-12-14 11:37:21,521 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 106 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:37:21,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 100 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:37:21,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 11:37:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-12-14 11:37:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:21,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-12-14 11:37:21,538 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2022-12-14 11:37:21,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:37:21,539 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-12-14 11:37:21,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 55 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:21,539 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-12-14 11:37:21,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 11:37:21,539 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:37:21,539 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 11:37:21,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 11:37:21,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 11:37:21,740 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:37:21,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:37:21,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1760543031, now seen corresponding path program 15 times [2022-12-14 11:37:21,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:37:21,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596735455] [2022-12-14 11:37:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:21,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:37:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:37:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:22,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:37:22,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596735455] [2022-12-14 11:37:22,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596735455] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:37:22,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084795393] [2022-12-14 11:37:22,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:37:22,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:22,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:37:22,489 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:37:22,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 11:37:22,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:37:22,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:37:22,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 11:37:22,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:37:22,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:37:22,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2022-12-14 11:37:22,777 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 24 treesize of output 7 [2022-12-14 11:37:22,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 115 [2022-12-14 11:37:22,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 58 [2022-12-14 11:37:22,830 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 44 treesize of output 30 [2022-12-14 11:37:22,836 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 44 treesize of output 30 [2022-12-14 11:37:22,847 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 44 treesize of output 30 [2022-12-14 11:37:22,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-12-14 11:37:22,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:37:22,884 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 24 treesize of output 13 [2022-12-14 11:37:23,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-12-14 11:37:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:23,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:37:24,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:37:24,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:37:24,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:37:24,364 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:37:24,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 88 [2022-12-14 11:37:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:24,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084795393] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:37:24,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [170437672] [2022-12-14 11:37:24,624 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:37:24,624 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:37:24,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:37:24,625 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:37:24,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:37:24,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:24,650 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:37:24,650 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 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 11:37:24,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:24,675 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:37:24,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:37:24,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:24,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:37:24,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:24,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:24,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:24,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 208 [2022-12-14 11:37:24,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:24,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:37:24,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:24,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:24,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:24,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 479 treesize of output 512 [2022-12-14 11:37:24,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:24,857 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 410 treesize of output 410 [2022-12-14 11:37:24,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:24,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:37:24,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:24,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:24,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:24,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:24,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 92 [2022-12-14 11:37:24,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:24,954 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 38 treesize of output 14 [2022-12-14 11:37:24,980 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:37:24,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:25,000 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 13 treesize of output 7 [2022-12-14 11:37:25,017 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 11 treesize of output 7 [2022-12-14 11:37:25,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:25,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:37:25,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:37:25,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:25,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:37:25,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:25,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 74 treesize of output 60 [2022-12-14 11:37:25,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:25,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-12-14 11:37:25,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:25,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 69 treesize of output 46 [2022-12-14 11:37:25,314 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 21 treesize of output 7 [2022-12-14 11:37:25,328 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 3 [2022-12-14 11:37:25,343 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 3 [2022-12-14 11:37:25,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:25,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-12-14 11:37:25,363 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 54 treesize of output 40 [2022-12-14 11:37:25,371 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 40 treesize of output 19 [2022-12-14 11:37:25,386 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:37:25,540 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:37:26,485 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5743#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:37:26,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:37:26,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:37:26,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 59 [2022-12-14 11:37:26,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033226744] [2022-12-14 11:37:26,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:37:26,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-14 11:37:26,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:37:26,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-14 11:37:26,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=4067, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 11:37:26,487 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:36,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:37:36,309 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2022-12-14 11:37:36,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-12-14 11:37:36,309 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-14 11:37:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:37:36,310 INFO L225 Difference]: With dead ends: 148 [2022-12-14 11:37:36,310 INFO L226 Difference]: Without dead ends: 146 [2022-12-14 11:37:36,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6632 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1917, Invalid=24815, Unknown=0, NotChecked=0, Total=26732 [2022-12-14 11:37:36,311 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 314 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:37:36,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 306 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 11:37:36,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-12-14 11:37:36,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 47. [2022-12-14 11:37:36,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:36,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-12-14 11:37:36,337 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2022-12-14 11:37:36,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:37:36,337 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-12-14 11:37:36,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:36,338 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-12-14 11:37:36,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 11:37:36,338 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:37:36,338 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 11:37:36,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 11:37:36,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 11:37:36,540 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:37:36,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:37:36,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1808459082, now seen corresponding path program 16 times [2022-12-14 11:37:36,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:37:36,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064235550] [2022-12-14 11:37:36,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:36,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:37:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:37:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:37,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:37:37,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064235550] [2022-12-14 11:37:37,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064235550] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:37:37,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154226539] [2022-12-14 11:37:37,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:37:37,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:37,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:37:37,261 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:37:37,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 11:37:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:37:37,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 11:37:37,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:37:37,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:37:37,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:37:37,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-12-14 11:37:38,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 11:37:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:38,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:37:38,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:37:38,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:37:38,555 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 54 treesize of output 39 [2022-12-14 11:37:38,562 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:37:38,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-12-14 11:37:38,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-12-14 11:37:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:38,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154226539] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:37:38,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [112424558] [2022-12-14 11:37:38,738 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:37:38,738 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:37:38,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:37:38,738 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:37:38,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:37:38,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:38,765 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:37:38,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:37:38,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:38,773 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:37:38,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:38,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:37:38,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:38,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:38,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 208 [2022-12-14 11:37:38,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:38,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:37:38,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:38,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:38,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:38,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 507 treesize of output 548 [2022-12-14 11:37:38,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:38,936 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 454 treesize of output 456 [2022-12-14 11:37:38,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:38,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:37:39,027 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:37:39,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:39,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:39,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:39,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:39,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 90 [2022-12-14 11:37:39,094 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 11 treesize of output 7 [2022-12-14 11:37:39,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:39,106 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 13 treesize of output 7 [2022-12-14 11:37:39,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:39,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:39,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:39,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:39,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:39,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:39,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 45 treesize of output 29 [2022-12-14 11:37:39,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:39,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:37:39,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:37:39,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:39,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:37:39,331 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 21 treesize of output 7 [2022-12-14 11:37:39,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 244 [2022-12-14 11:37:39,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:39,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:37:39,402 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 21 treesize of output 7 [2022-12-14 11:37:39,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:37:39,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 150 treesize of output 165 [2022-12-14 11:37:39,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:39,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-12-14 11:37:39,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-12-14 11:37:39,483 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:37:39,622 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:37:40,327 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6556#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:37:40,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:37:40,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:37:40,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 22] total 63 [2022-12-14 11:37:40,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704952135] [2022-12-14 11:37:40,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:37:40,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-14 11:37:40,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:37:40,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-14 11:37:40,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=4594, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 11:37:40,329 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:52,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:37:52,216 INFO L93 Difference]: Finished difference Result 187 states and 203 transitions. [2022-12-14 11:37:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-12-14 11:37:52,216 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-12-14 11:37:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:37:52,217 INFO L225 Difference]: With dead ends: 187 [2022-12-14 11:37:52,217 INFO L226 Difference]: Without dead ends: 185 [2022-12-14 11:37:52,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9855 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=2811, Invalid=35019, Unknown=0, NotChecked=0, Total=37830 [2022-12-14 11:37:52,218 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 632 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 2104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:37:52,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 357 Invalid, 2104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1847 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 11:37:52,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-12-14 11:37:52,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 50. [2022-12-14 11:37:52,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-12-14 11:37:52,241 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2022-12-14 11:37:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:37:52,241 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-12-14 11:37:52,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-12-14 11:37:52,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 11:37:52,242 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:37:52,242 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 11:37:52,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 11:37:52,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 11:37:52,444 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:37:52,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:37:52,445 INFO L85 PathProgramCache]: Analyzing trace with hash -259972311, now seen corresponding path program 17 times [2022-12-14 11:37:52,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:37:52,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133485843] [2022-12-14 11:37:52,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:52,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:37:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:37:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 188 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:53,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:37:53,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133485843] [2022-12-14 11:37:53,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133485843] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:37:53,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490339899] [2022-12-14 11:37:53,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:37:53,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:53,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:37:53,032 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:37:53,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 11:37:54,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-14 11:37:54,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:37:54,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:37:54,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:37:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 222 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:54,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:37:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 222 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:55,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490339899] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:37:55,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [182220443] [2022-12-14 11:37:55,073 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:37:55,073 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:37:55,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:37:55,073 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:37:55,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:37:55,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,098 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:37:55,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:37:55,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,107 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:37:55,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:37:55,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 239 [2022-12-14 11:37:55,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:37:55,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 129 [2022-12-14 11:37:55,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 129 [2022-12-14 11:37:55,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 46 [2022-12-14 11:37:55,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,300 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 13 treesize of output 7 [2022-12-14 11:37:55,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 196 [2022-12-14 11:37:55,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,331 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 137 treesize of output 111 [2022-12-14 11:37:55,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,341 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 13 treesize of output 7 [2022-12-14 11:37:55,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:37:55,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:37:55,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:37:55,500 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:37:55,508 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 81 treesize of output 56 [2022-12-14 11:37:55,519 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 21 treesize of output 7 [2022-12-14 11:37:55,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:55,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-12-14 11:37:55,535 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 33 treesize of output 21 [2022-12-14 11:37:55,540 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 21 treesize of output 7 [2022-12-14 11:37:55,552 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 21 treesize of output 7 [2022-12-14 11:37:55,562 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 3 [2022-12-14 11:37:55,709 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:37:56,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7500#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:37:56,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:37:56,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:37:56,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 22] total 64 [2022-12-14 11:37:56,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071961918] [2022-12-14 11:37:56,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:37:56,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 11:37:56,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:37:56,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 11:37:56,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=4044, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 11:37:56,308 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 64 states, 64 states have (on average 2.203125) internal successors, (141), 64 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:56,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:37:56,822 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2022-12-14 11:37:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 11:37:56,823 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.203125) internal successors, (141), 64 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-14 11:37:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:37:56,823 INFO L225 Difference]: With dead ends: 93 [2022-12-14 11:37:56,823 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 11:37:56,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3009 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1469, Invalid=6013, Unknown=0, NotChecked=0, Total=7482 [2022-12-14 11:37:56,824 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 124 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:37:56,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 163 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:37:56,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 11:37:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-12-14 11:37:56,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-12-14 11:37:56,849 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 49 [2022-12-14 11:37:56,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:37:56,849 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-12-14 11:37:56,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.203125) internal successors, (141), 64 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:37:56,849 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-12-14 11:37:56,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 11:37:56,850 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:37:56,850 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 11:37:56,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 11:37:57,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:57,051 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:37:57,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:37:57,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1725071097, now seen corresponding path program 18 times [2022-12-14 11:37:57,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:37:57,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606614052] [2022-12-14 11:37:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:57,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:37:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:37:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:58,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:37:58,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606614052] [2022-12-14 11:37:58,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606614052] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:37:58,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742553955] [2022-12-14 11:37:58,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:37:58,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:58,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:37:58,151 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:37:58,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 11:37:58,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:37:58,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:37:58,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-14 11:37:58,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:37:58,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:37:58,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 87 [2022-12-14 11:37:58,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 63 treesize of output 93 [2022-12-14 11:37:58,497 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 18 treesize of output 7 [2022-12-14 11:37:58,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:37:58,511 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 18 treesize of output 7 [2022-12-14 11:37:58,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:37:58,524 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 53 treesize of output 39 [2022-12-14 11:37:58,530 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 31 treesize of output 16 [2022-12-14 11:37:58,537 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 22 [2022-12-14 11:37:58,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:37:58,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:37:58,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 11:37:58,554 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 18 treesize of output 7 [2022-12-14 11:37:58,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:37:59,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-12-14 11:37:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:59,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:38:00,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:38:00,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:38:00,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:38:00,062 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:38:00,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 88 [2022-12-14 11:38:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:38:00,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742553955] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:38:00,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [144770048] [2022-12-14 11:38:00,274 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:38:00,274 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:38:00,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:38:00,275 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:38:00,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:38:00,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,302 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:38:00,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:38:00,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,309 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:38:00,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:38:00,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 203 [2022-12-14 11:38:00,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:38:00,459 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:38:00,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,497 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 143 treesize of output 103 [2022-12-14 11:38:00,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,516 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 13 treesize of output 7 [2022-12-14 11:38:00,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 196 [2022-12-14 11:38:00,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,578 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 119 treesize of output 97 [2022-12-14 11:38:00,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,590 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 13 treesize of output 7 [2022-12-14 11:38:00,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:38:00,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:38:00,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:38:00,689 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:38:00,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 65 treesize of output 51 [2022-12-14 11:38:00,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2022-12-14 11:38:00,726 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 21 treesize of output 7 [2022-12-14 11:38:00,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:00,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-12-14 11:38:00,756 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 21 treesize of output 7 [2022-12-14 11:38:00,767 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 33 treesize of output 21 [2022-12-14 11:38:00,774 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 21 treesize of output 7 [2022-12-14 11:38:00,791 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 3 [2022-12-14 11:38:00,947 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:38:01,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8101#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:38:01,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:38:01,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:38:01,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 68 [2022-12-14 11:38:01,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939947280] [2022-12-14 11:38:01,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:38:01,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 11:38:01,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:38:01,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 11:38:01,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=5265, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 11:38:01,856 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 68 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:20,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:38:20,008 INFO L93 Difference]: Finished difference Result 204 states and 221 transitions. [2022-12-14 11:38:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-12-14 11:38:20,008 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 68 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-12-14 11:38:20,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:38:20,009 INFO L225 Difference]: With dead ends: 204 [2022-12-14 11:38:20,009 INFO L226 Difference]: Without dead ends: 202 [2022-12-14 11:38:20,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12514 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=2754, Invalid=41556, Unknown=0, NotChecked=0, Total=44310 [2022-12-14 11:38:20,011 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 360 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 2404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 2143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:38:20,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 411 Invalid, 2404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 2143 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 11:38:20,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-12-14 11:38:20,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 54. [2022-12-14 11:38:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:20,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-12-14 11:38:20,040 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2022-12-14 11:38:20,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:38:20,040 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-12-14 11:38:20,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 68 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:20,040 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-12-14 11:38:20,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 11:38:20,041 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:38:20,041 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 11:38:20,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 11:38:20,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:38:20,242 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:38:20,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:38:20,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1990890060, now seen corresponding path program 19 times [2022-12-14 11:38:20,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:38:20,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884761551] [2022-12-14 11:38:20,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:38:20,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:38:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:38:21,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:38:21,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884761551] [2022-12-14 11:38:21,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884761551] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:38:21,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312302361] [2022-12-14 11:38:21,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:38:21,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:38:21,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:38:21,065 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:38:21,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 11:38:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:21,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 11:38:21,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:38:21,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:38:21,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-12-14 11:38:21,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:38:22,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 11:38:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:38:22,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:38:22,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:38:22,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:38:22,782 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 54 treesize of output 41 [2022-12-14 11:38:22,787 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:38:22,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 35 [2022-12-14 11:38:23,001 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:38:23,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312302361] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:38:23,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [898143414] [2022-12-14 11:38:23,002 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:38:23,002 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:38:23,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:38:23,003 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:38:23,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:38:23,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,030 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:38:23,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:38:23,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,044 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:38:23,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:38:23,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 341 [2022-12-14 11:38:23,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,138 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 236 treesize of output 240 [2022-12-14 11:38:23,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,154 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 238 treesize of output 242 [2022-12-14 11:38:23,165 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 229 treesize of output 227 [2022-12-14 11:38:23,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:38:23,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 368 [2022-12-14 11:38:23,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:38:23,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,376 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 266 [2022-12-14 11:38:23,422 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 11:38:23,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2022-12-14 11:38:23,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 88 treesize of output 58 [2022-12-14 11:38:23,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:38:23,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,547 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 13 treesize of output 7 [2022-12-14 11:38:23,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:38:23,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-12-14 11:38:23,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-12-14 11:38:23,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-12-14 11:38:23,643 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 21 treesize of output 7 [2022-12-14 11:38:23,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 176 [2022-12-14 11:38:23,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:38:23,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 224 treesize of output 262 [2022-12-14 11:38:23,754 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:38:23,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:23,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-12-14 11:38:23,798 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 21 treesize of output 7 [2022-12-14 11:38:23,944 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:38:24,737 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9129#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:38:24,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:38:24,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:38:24,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 25] total 72 [2022-12-14 11:38:24,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103339808] [2022-12-14 11:38:24,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:38:24,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-12-14 11:38:24,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:38:24,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-12-14 11:38:24,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=5895, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 11:38:24,740 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 72 states, 72 states have (on average 2.138888888888889) internal successors, (154), 72 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:45,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:38:45,133 INFO L93 Difference]: Finished difference Result 249 states and 268 transitions. [2022-12-14 11:38:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-12-14 11:38:45,134 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.138888888888889) internal successors, (154), 72 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-12-14 11:38:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:38:45,134 INFO L225 Difference]: With dead ends: 249 [2022-12-14 11:38:45,134 INFO L226 Difference]: Without dead ends: 247 [2022-12-14 11:38:45,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16784 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=3963, Invalid=56307, Unknown=0, NotChecked=0, Total=60270 [2022-12-14 11:38:45,137 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 902 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 2179 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 2179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:38:45,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 397 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 2179 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 11:38:45,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-12-14 11:38:45,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 57. [2022-12-14 11:38:45,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:45,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-12-14 11:38:45,169 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2022-12-14 11:38:45,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:38:45,169 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-12-14 11:38:45,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.138888888888889) internal successors, (154), 72 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:45,170 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-12-14 11:38:45,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 11:38:45,170 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:38:45,170 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 11:38:45,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 11:38:45,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:38:45,371 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:38:45,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:38:45,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1407663847, now seen corresponding path program 20 times [2022-12-14 11:38:45,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:38:45,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211793031] [2022-12-14 11:38:45,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:38:45,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:38:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 261 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:38:46,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:38:46,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211793031] [2022-12-14 11:38:46,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211793031] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:38:46,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515313076] [2022-12-14 11:38:46,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:38:46,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:38:46,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:38:46,098 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:38:46,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 11:38:47,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-14 11:38:47,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:38:47,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 11:38:47,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:38:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 301 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:38:48,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:38:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 301 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:38:48,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515313076] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:38:48,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [398117909] [2022-12-14 11:38:48,745 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:38:48,745 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:38:48,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:38:48,746 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:38:48,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:38:48,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:48,771 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:38:48,772 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 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 11:38:48,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:48,793 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:38:48,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:38:48,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:48,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:38:48,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:48,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:48,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:48,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 286 [2022-12-14 11:38:48,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:48,897 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 173 treesize of output 177 [2022-12-14 11:38:48,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:48,915 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 175 treesize of output 179 [2022-12-14 11:38:48,929 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 166 treesize of output 164 [2022-12-14 11:38:48,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:48,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:48,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:38:49,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 62 [2022-12-14 11:38:49,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:38:49,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 49 treesize of output 61 [2022-12-14 11:38:49,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:38:49,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 81 [2022-12-14 11:38:49,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-12-14 11:38:49,266 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:38:49,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:38:49,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:38:49,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:38:49,359 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:38:49,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-12-14 11:38:49,383 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 154 [2022-12-14 11:38:49,400 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 21 treesize of output 7 [2022-12-14 11:38:49,415 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 3 [2022-12-14 11:38:49,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:49,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-12-14 11:38:49,431 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 21 treesize of output 7 [2022-12-14 11:38:49,438 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 33 treesize of output 21 [2022-12-14 11:38:49,446 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 21 treesize of output 7 [2022-12-14 11:38:49,589 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:38:50,115 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10304#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:38:50,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:38:50,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:38:50,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 25] total 73 [2022-12-14 11:38:50,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767331900] [2022-12-14 11:38:50,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:38:50,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-14 11:38:50,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:38:50,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-14 11:38:50,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=5130, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 11:38:50,117 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 73 states, 73 states have (on average 2.219178082191781) internal successors, (162), 73 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:50,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:38:50,721 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2022-12-14 11:38:50,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 11:38:50,722 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.219178082191781) internal successors, (162), 73 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-12-14 11:38:50,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:38:50,722 INFO L225 Difference]: With dead ends: 106 [2022-12-14 11:38:50,722 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 11:38:50,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1873, Invalid=7633, Unknown=0, NotChecked=0, Total=9506 [2022-12-14 11:38:50,723 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 164 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:38:50,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 166 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:38:50,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 11:38:50,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-12-14 11:38:50,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-12-14 11:38:50,757 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2022-12-14 11:38:50,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:38:50,757 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-12-14 11:38:50,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.219178082191781) internal successors, (162), 73 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:50,758 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-12-14 11:38:50,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 11:38:50,758 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:38:50,758 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 11:38:50,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 11:38:50,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:38:50,959 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:38:50,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:38:50,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1270011063, now seen corresponding path program 21 times [2022-12-14 11:38:50,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:38:50,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269228158] [2022-12-14 11:38:50,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:38:50,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:38:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:38:52,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:38:52,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269228158] [2022-12-14 11:38:52,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269228158] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:38:52,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587988790] [2022-12-14 11:38:52,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:38:52,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:38:52,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:38:52,086 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:38:52,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 11:38:52,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:38:52,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:38:52,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-14 11:38:52,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:38:52,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:38:52,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 87 [2022-12-14 11:38:52,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 63 treesize of output 93 [2022-12-14 11:38:52,553 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 24 treesize of output 13 [2022-12-14 11:38:52,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 79 [2022-12-14 11:38:52,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 58 [2022-12-14 11:38:52,593 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 9 [2022-12-14 11:38:52,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2022-12-14 11:38:52,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:38:53,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-12-14 11:38:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:38:53,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:38:54,702 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:38:54,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:38:54,739 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 132 treesize of output 113 [2022-12-14 11:38:54,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:38:54,747 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:38:54,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 54 [2022-12-14 11:38:54,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-12-14 11:38:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:38:55,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587988790] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:38:55,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1089386409] [2022-12-14 11:38:55,168 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:38:55,168 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:38:55,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:38:55,168 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:38:55,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:38:55,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,198 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:38:55,199 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 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 11:38:55,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,227 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:38:55,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:38:55,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:38:55,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 297 treesize of output 331 [2022-12-14 11:38:55,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,315 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 215 treesize of output 219 [2022-12-14 11:38:55,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,330 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 217 treesize of output 221 [2022-12-14 11:38:55,342 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 208 treesize of output 206 [2022-12-14 11:38:55,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:38:55,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 48 treesize of output 62 [2022-12-14 11:38:55,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:38:55,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 62 [2022-12-14 11:38:55,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:38:55,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:38:55,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:38:55,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:38:55,642 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 86 treesize of output 68 [2022-12-14 11:38:55,655 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 86 treesize of output 68 [2022-12-14 11:38:55,683 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 21 treesize of output 7 [2022-12-14 11:38:55,693 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 21 treesize of output 10 [2022-12-14 11:38:55,697 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 3 [2022-12-14 11:38:55,706 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 3 [2022-12-14 11:38:55,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-12-14 11:38:55,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:55,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-12-14 11:38:55,728 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 21 treesize of output 7 [2022-12-14 11:38:55,735 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:38:55,868 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:38:56,731 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10988#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:38:56,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:38:56,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:38:56,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 77 [2022-12-14 11:38:56,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239020973] [2022-12-14 11:38:56,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:38:56,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-14 11:38:56,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:38:56,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-14 11:38:56,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=6687, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 11:38:56,733 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 77 states, 77 states have (on average 2.142857142857143) internal successors, (165), 77 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:24,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:24,878 INFO L93 Difference]: Finished difference Result 269 states and 289 transitions. [2022-12-14 11:39:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-12-14 11:39:24,879 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.142857142857143) internal successors, (165), 77 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-12-14 11:39:24,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:24,879 INFO L225 Difference]: With dead ends: 269 [2022-12-14 11:39:24,879 INFO L226 Difference]: Without dead ends: 267 [2022-12-14 11:39:24,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19726 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=3959, Invalid=65473, Unknown=0, NotChecked=0, Total=69432 [2022-12-14 11:39:24,882 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 689 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 2720 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 3118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 2720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:24,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 513 Invalid, 3118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 2720 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-12-14 11:39:24,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-12-14 11:39:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 61. [2022-12-14 11:39:24,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-12-14 11:39:24,927 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 57 [2022-12-14 11:39:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:24,927 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-12-14 11:39:24,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.142857142857143) internal successors, (165), 77 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:24,927 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-12-14 11:39:24,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 11:39:24,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:24,927 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 11:39:24,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 11:39:25,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 11:39:25,129 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:39:25,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:25,130 INFO L85 PathProgramCache]: Analyzing trace with hash -527390518, now seen corresponding path program 22 times [2022-12-14 11:39:25,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:39:25,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261399245] [2022-12-14 11:39:25,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:25,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:39:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:39:26,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:39:26,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261399245] [2022-12-14 11:39:26,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261399245] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:39:26,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882013149] [2022-12-14 11:39:26,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:39:26,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:39:26,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:39:26,083 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:39:26,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 11:39:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:26,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-14 11:39:26,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:26,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:39:26,493 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 18 treesize of output 7 [2022-12-14 11:39:26,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:39:27,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 11:39:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:39:27,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:39:28,595 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:39:28,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:39:28,619 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:39:28,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-12-14 11:39:28,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-12-14 11:39:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:39:28,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882013149] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:39:28,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [575982674] [2022-12-14 11:39:28,999 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:39:28,999 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:39:28,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:39:28,999 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:39:28,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:39:29,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:29,031 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:39:29,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:39:29,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:29,041 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:39:29,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:29,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-12-14 11:39:29,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:29,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 247 [2022-12-14 11:39:29,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:39:29,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:29,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:29,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:29,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 372 treesize of output 433 [2022-12-14 11:39:29,206 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 273 [2022-12-14 11:39:29,222 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 249 [2022-12-14 11:39:29,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:39:29,285 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 10 [2022-12-14 11:39:29,300 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 21 treesize of output 7 [2022-12-14 11:39:29,353 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 19 treesize of output 12 [2022-12-14 11:39:29,367 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 19 treesize of output 12 [2022-12-14 11:39:29,394 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:39:29,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:29,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:29,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:29,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:29,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:29,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2022-12-14 11:39:29,438 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 21 treesize of output 7 [2022-12-14 11:39:29,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:29,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:39:29,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:39:29,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:29,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:39:29,601 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 21 treesize of output 7 [2022-12-14 11:39:29,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:29,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-12-14 11:39:29,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 240 [2022-12-14 11:39:29,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:29,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:39:29,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:29,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-12-14 11:39:29,677 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:39:29,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 261 [2022-12-14 11:39:29,742 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 21 treesize of output 7 [2022-12-14 11:39:29,924 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:39:30,862 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12255#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:39:30,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:39:30,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:39:30,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 28] total 81 [2022-12-14 11:39:30,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632779594] [2022-12-14 11:39:30,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:39:30,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-12-14 11:39:30,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:39:30,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-12-14 11:39:30,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=7358, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 11:39:30,864 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 81 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:01,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:01,460 INFO L93 Difference]: Finished difference Result 320 states and 342 transitions. [2022-12-14 11:40:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2022-12-14 11:40:01,461 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 81 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-12-14 11:40:01,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:01,461 INFO L225 Difference]: With dead ends: 320 [2022-12-14 11:40:01,461 INFO L226 Difference]: Without dead ends: 318 [2022-12-14 11:40:01,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26929 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=5386, Invalid=86120, Unknown=0, NotChecked=0, Total=91506 [2022-12-14 11:40:01,465 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1191 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 2818 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 2818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:01,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 505 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 2818 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 11:40:01,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-12-14 11:40:01,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 64. [2022-12-14 11:40:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-12-14 11:40:01,508 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2022-12-14 11:40:01,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:01,508 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-12-14 11:40:01,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 81 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:01,509 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-12-14 11:40:01,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 11:40:01,509 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:01,509 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:01,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 11:40:01,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 11:40:01,710 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:40:01,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:01,711 INFO L85 PathProgramCache]: Analyzing trace with hash -495276119, now seen corresponding path program 23 times [2022-12-14 11:40:01,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:40:01,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811203510] [2022-12-14 11:40:01,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:40:01,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:40:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:40:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 346 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:02,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:40:02,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811203510] [2022-12-14 11:40:02,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811203510] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:40:02,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025752922] [2022-12-14 11:40:02,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:40:02,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:02,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:40:02,599 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:40:02,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 11:40:08,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-12-14 11:40:08,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:08,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 11:40:08,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 392 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:09,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 392 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:09,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025752922] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:09,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1552589148] [2022-12-14 11:40:09,848 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:40:09,848 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:40:09,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:40:09,848 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:40:09,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:40:09,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:09,879 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:40:09,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:40:09,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:09,888 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:40:09,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:09,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:40:09,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:09,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:09,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:09,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 301 [2022-12-14 11:40:09,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:09,983 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 194 treesize of output 198 [2022-12-14 11:40:09,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:09,996 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 196 treesize of output 200 [2022-12-14 11:40:10,007 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 187 treesize of output 185 [2022-12-14 11:40:10,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:40:10,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 318 treesize of output 329 [2022-12-14 11:40:10,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:40:10,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,239 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 313 [2022-12-14 11:40:10,248 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 296 treesize of output 292 [2022-12-14 11:40:10,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 292 treesize of output 288 [2022-12-14 11:40:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 11:40:10,329 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:40:10,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 60 [2022-12-14 11:40:10,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:40:10,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:40:10,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-12-14 11:40:10,476 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 56 treesize of output 17 [2022-12-14 11:40:10,487 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 21 treesize of output 7 [2022-12-14 11:40:10,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 177 [2022-12-14 11:40:10,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:10,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:40:10,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 52 [2022-12-14 11:40:10,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:40:10,584 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 52 treesize of output 16 [2022-12-14 11:40:10,593 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 111 [2022-12-14 11:40:10,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-12-14 11:40:10,613 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 21 treesize of output 7 [2022-12-14 11:40:10,734 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:40:11,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13685#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:40:11,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:40:11,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:40:11,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 28] total 82 [2022-12-14 11:40:11,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551222039] [2022-12-14 11:40:11,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:40:11,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-12-14 11:40:11,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:40:11,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-12-14 11:40:11,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1488, Invalid=6344, Unknown=0, NotChecked=0, Total=7832 [2022-12-14 11:40:11,426 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 82 states, 82 states have (on average 2.231707317073171) internal successors, (183), 82 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:12,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:12,250 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2022-12-14 11:40:12,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 11:40:12,251 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.231707317073171) internal successors, (183), 82 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-12-14 11:40:12,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:12,251 INFO L225 Difference]: With dead ends: 119 [2022-12-14 11:40:12,251 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 11:40:12,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4891 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2327, Invalid=9445, Unknown=0, NotChecked=0, Total=11772 [2022-12-14 11:40:12,252 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 170 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:12,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 198 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:40:12,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 11:40:12,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-12-14 11:40:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-12-14 11:40:12,304 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 63 [2022-12-14 11:40:12,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:12,304 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-12-14 11:40:12,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.231707317073171) internal successors, (183), 82 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:12,305 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-12-14 11:40:12,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 11:40:12,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:12,305 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 9, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:12,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 11:40:12,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:12,506 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:40:12,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:12,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1878626041, now seen corresponding path program 24 times [2022-12-14 11:40:12,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:40:12,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685532618] [2022-12-14 11:40:12,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:40:12,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:40:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:40:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:13,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:40:13,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685532618] [2022-12-14 11:40:13,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685532618] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:40:13,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751477750] [2022-12-14 11:40:13,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:40:13,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:13,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:40:13,776 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:40:13,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 11:40:13,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:40:13,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:13,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 77 conjunts are in the unsatisfiable core [2022-12-14 11:40:13,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:14,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:40:14,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2022-12-14 11:40:14,244 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 24 treesize of output 7 [2022-12-14 11:40:14,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 115 [2022-12-14 11:40:14,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 58 [2022-12-14 11:40:14,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 25 treesize of output 25 [2022-12-14 11:40:14,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:14,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 25 treesize of output 25 [2022-12-14 11:40:14,310 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 37 treesize of output 13 [2022-12-14 11:40:14,317 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 37 treesize of output 13 [2022-12-14 11:40:14,335 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 7 treesize of output 3 [2022-12-14 11:40:14,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-12-14 11:40:15,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-12-14 11:40:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:15,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:16,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:40:16,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:40:16,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:40:16,557 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:40:16,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 54 [2022-12-14 11:40:16,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-12-14 11:40:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:17,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751477750] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:17,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1011849133] [2022-12-14 11:40:17,048 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:40:17,048 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:40:17,048 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:40:17,048 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:40:17,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:40:17,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,078 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:40:17,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:40:17,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,087 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:40:17,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-12-14 11:40:17,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 230 [2022-12-14 11:40:17,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:40:17,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 565 treesize of output 596 [2022-12-14 11:40:17,282 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 488 treesize of output 480 [2022-12-14 11:40:17,299 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 464 treesize of output 456 [2022-12-14 11:40:17,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:40:17,370 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 19 treesize of output 12 [2022-12-14 11:40:17,390 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:40:17,433 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 21 treesize of output 7 [2022-12-14 11:40:17,451 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 10 [2022-12-14 11:40:17,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,566 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 106 treesize of output 80 [2022-12-14 11:40:17,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 108 [2022-12-14 11:40:17,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:40:17,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-12-14 11:40:17,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 14 [2022-12-14 11:40:17,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 14 [2022-12-14 11:40:17,702 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 21 treesize of output 7 [2022-12-14 11:40:17,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 177 [2022-12-14 11:40:17,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:40:17,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 76 [2022-12-14 11:40:17,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:17,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-12-14 11:40:17,762 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:40:17,773 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 41 treesize of output 29 [2022-12-14 11:40:17,780 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 21 treesize of output 7 [2022-12-14 11:40:17,961 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:40:19,116 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14452#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:40:19,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:40:19,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:40:19,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 86 [2022-12-14 11:40:19,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982137983] [2022-12-14 11:40:19,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:40:19,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-12-14 11:40:19,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:40:19,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-12-14 11:40:19,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=8240, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 11:40:19,118 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 86 states, 86 states have (on average 2.1627906976744184) internal successors, (186), 86 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:59,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:59,014 INFO L93 Difference]: Finished difference Result 343 states and 366 transitions. [2022-12-14 11:40:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2022-12-14 11:40:59,015 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.1627906976744184) internal successors, (186), 86 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-12-14 11:40:59,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:59,015 INFO L225 Difference]: With dead ends: 343 [2022-12-14 11:40:59,015 INFO L226 Difference]: Without dead ends: 341 [2022-12-14 11:40:59,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31108 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=5358, Invalid=98648, Unknown=0, NotChecked=0, Total=104006 [2022-12-14 11:40:59,019 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 756 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 3161 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 3689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 3161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:59,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [756 Valid, 576 Invalid, 3689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 3161 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-12-14 11:40:59,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-12-14 11:40:59,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 68. [2022-12-14 11:40:59,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-12-14 11:40:59,078 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2022-12-14 11:40:59,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:59,078 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-12-14 11:40:59,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.1627906976744184) internal successors, (186), 86 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-12-14 11:40:59,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 11:40:59,078 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:59,078 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 9, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:59,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-14 11:40:59,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 11:40:59,279 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:40:59,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:59,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1575723596, now seen corresponding path program 25 times [2022-12-14 11:40:59,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:40:59,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458188111] [2022-12-14 11:40:59,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:40:59,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:40:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:41:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:00,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:41:00,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458188111] [2022-12-14 11:41:00,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458188111] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:41:00,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921689904] [2022-12-14 11:41:00,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:41:00,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:41:00,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:41:00,559 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:41:00,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 11:41:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:41:00,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-14 11:41:00,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:00,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:41:00,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-12-14 11:41:00,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:41:01,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 11:41:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:02,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:03,177 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:41:03,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:41:03,199 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:41:03,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 35 [2022-12-14 11:41:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:03,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921689904] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:03,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [324049163] [2022-12-14 11:41:03,652 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:41:03,652 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:41:03,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:41:03,652 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:41:03,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:41:03,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:03,682 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:41:03,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:41:03,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:03,691 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:41:03,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:03,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-12-14 11:41:03,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:03,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:03,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:03,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 245 treesize of output 303 [2022-12-14 11:41:03,780 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 135 treesize of output 128 [2022-12-14 11:41:03,794 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 142 treesize of output 146 [2022-12-14 11:41:03,812 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 144 treesize of output 148 [2022-12-14 11:41:03,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:03,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:41:04,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 76 [2022-12-14 11:41:04,062 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 3 [2022-12-14 11:41:04,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 462 treesize of output 495 [2022-12-14 11:41:04,107 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 467 treesize of output 459 [2022-12-14 11:41:04,119 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 445 treesize of output 438 [2022-12-14 11:41:04,190 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 10 [2022-12-14 11:41:04,230 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:41:04,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:41:04,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-12-14 11:41:04,360 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 56 treesize of output 17 [2022-12-14 11:41:04,370 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 21 treesize of output 7 [2022-12-14 11:41:04,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 177 [2022-12-14 11:41:04,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:41:04,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 25 treesize of output 25 [2022-12-14 11:41:04,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 11:41:04,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:04,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2022-12-14 11:41:04,486 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:41:04,511 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 21 treesize of output 7 [2022-12-14 11:41:04,527 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 21 treesize of output 7 [2022-12-14 11:41:04,685 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:41:05,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15982#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:41:05,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:41:05,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:41:05,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 31] total 90 [2022-12-14 11:41:05,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922529688] [2022-12-14 11:41:05,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:41:05,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-12-14 11:41:05,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:41:05,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-12-14 11:41:05,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=8983, Unknown=0, NotChecked=0, Total=9312 [2022-12-14 11:41:05,860 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 90 states, 90 states have (on average 2.1777777777777776) internal successors, (196), 90 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:53,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:41:53,048 INFO L93 Difference]: Finished difference Result 400 states and 425 transitions. [2022-12-14 11:41:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 271 states. [2022-12-14 11:41:53,048 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.1777777777777776) internal successors, (196), 90 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-12-14 11:41:53,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:41:53,049 INFO L225 Difference]: With dead ends: 400 [2022-12-14 11:41:53,049 INFO L226 Difference]: Without dead ends: 398 [2022-12-14 11:41:53,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 364 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41173 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=7086, Invalid=126504, Unknown=0, NotChecked=0, Total=133590 [2022-12-14 11:41:53,055 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1365 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 3876 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 4461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 3876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:41:53,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1365 Valid, 697 Invalid, 4461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 3876 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-12-14 11:41:53,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-12-14 11:41:53,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 71. [2022-12-14 11:41:53,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-12-14 11:41:53,112 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 67 [2022-12-14 11:41:53,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:41:53,113 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-12-14 11:41:53,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.1777777777777776) internal successors, (196), 90 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-12-14 11:41:53,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 11:41:53,113 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:41:53,113 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 9, 1, 1, 1, 1, 1, 1] [2022-12-14 11:41:53,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 11:41:53,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 11:41:53,314 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:41:53,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:41:53,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1605619993, now seen corresponding path program 26 times [2022-12-14 11:41:53,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:41:53,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014133659] [2022-12-14 11:41:53,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:41:53,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:41:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:41:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 443 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:54,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:41:54,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014133659] [2022-12-14 11:41:54,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014133659] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:41:54,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221667624] [2022-12-14 11:41:54,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:41:54,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:41:54,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:41:54,543 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:41:54,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 11:42:08,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-12-14 11:42:08,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:42:08,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 11:42:08,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:42:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 495 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:42:09,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:42:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 495 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:42:09,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221667624] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:42:09,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [122550765] [2022-12-14 11:42:09,999 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:42:09,999 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:42:09,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:42:09,999 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:42:09,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:42:10,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,031 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:42:10,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:42:10,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,041 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:42:10,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:42:10,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 316 [2022-12-14 11:42:10,133 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 204 treesize of output 202 [2022-12-14 11:42:10,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,147 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 213 treesize of output 217 [2022-12-14 11:42:10,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,163 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 215 treesize of output 219 [2022-12-14 11:42:10,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:42:10,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 90 [2022-12-14 11:42:10,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 90 [2022-12-14 11:42:10,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 41 [2022-12-14 11:42:10,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,334 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 13 treesize of output 7 [2022-12-14 11:42:10,419 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:42:10,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:42:10,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-12-14 11:42:10,484 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:42:10,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-12-14 11:42:10,507 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 21 treesize of output 7 [2022-12-14 11:42:10,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 119 [2022-12-14 11:42:10,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:42:10,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 17 treesize of output 8 [2022-12-14 11:42:10,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2022-12-14 11:42:10,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:10,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2022-12-14 11:42:10,599 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 21 treesize of output 7 [2022-12-14 11:42:10,751 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:42:11,446 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17691#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:42:11,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:42:11,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:42:11,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 31] total 91 [2022-12-14 11:42:11,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306332192] [2022-12-14 11:42:11,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:42:11,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-12-14 11:42:11,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:42:11,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-12-14 11:42:11,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1820, Invalid=7686, Unknown=0, NotChecked=0, Total=9506 [2022-12-14 11:42:11,448 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 91 states, 91 states have (on average 2.241758241758242) internal successors, (204), 91 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:42:12,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:42:12,260 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2022-12-14 11:42:12,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 11:42:12,260 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.241758241758242) internal successors, (204), 91 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-12-14 11:42:12,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:42:12,261 INFO L225 Difference]: With dead ends: 132 [2022-12-14 11:42:12,261 INFO L226 Difference]: Without dead ends: 72 [2022-12-14 11:42:12,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6000 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2831, Invalid=11449, Unknown=0, NotChecked=0, Total=14280 [2022-12-14 11:42:12,262 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 178 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:42:12,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 179 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:42:12,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-14 11:42:12,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-12-14 11:42:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:42:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-12-14 11:42:12,331 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2022-12-14 11:42:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:42:12,331 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-12-14 11:42:12,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.241758241758242) internal successors, (204), 91 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:42:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-12-14 11:42:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 11:42:12,331 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:42:12,332 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 11:42:12,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 11:42:12,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 11:42:12,533 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:42:12,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:42:12,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1746679863, now seen corresponding path program 27 times [2022-12-14 11:42:12,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:42:12,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309967374] [2022-12-14 11:42:12,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:42:12,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:42:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:42:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:42:14,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:42:14,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309967374] [2022-12-14 11:42:14,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309967374] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:42:14,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102014072] [2022-12-14 11:42:14,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:42:14,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:42:14,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:42:14,331 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:42:14,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 11:42:14,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:42:14,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:42:14,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-14 11:42:14,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:42:14,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:42:14,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 87 [2022-12-14 11:42:14,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 63 treesize of output 93 [2022-12-14 11:42:15,039 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 16 treesize of output 1 [2022-12-14 11:42:15,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 11:42:15,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 58 [2022-12-14 11:42:15,103 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 18 treesize of output 7 [2022-12-14 11:42:15,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:42:15,110 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 18 treesize of output 7 [2022-12-14 11:42:15,113 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 7 treesize of output 3 [2022-12-14 11:42:15,122 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 36 treesize of output 24 [2022-12-14 11:42:15,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:15,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-12-14 11:42:16,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-12-14 11:42:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:42:16,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:42:17,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:42:17,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:42:17,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:42:17,970 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:42:17,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 88 [2022-12-14 11:42:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:42:18,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102014072] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:42:18,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1792914154] [2022-12-14 11:42:18,417 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:42:18,417 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:42:18,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:42:18,417 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:42:18,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:42:18,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,446 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:42:18,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:42:18,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,469 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:42:18,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:42:18,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 316 [2022-12-14 11:42:18,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,561 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 215 treesize of output 219 [2022-12-14 11:42:18,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,574 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 217 treesize of output 221 [2022-12-14 11:42:18,588 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 208 treesize of output 206 [2022-12-14 11:42:18,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:42:18,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 65 [2022-12-14 11:42:18,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 14 [2022-12-14 11:42:18,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:42:18,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 374 treesize of output 401 [2022-12-14 11:42:18,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 396 treesize of output 416 [2022-12-14 11:42:18,885 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 363 treesize of output 359 [2022-12-14 11:42:18,969 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:42:18,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:18,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-12-14 11:42:19,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:19,005 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 13 treesize of output 7 [2022-12-14 11:42:19,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:19,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:42:19,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:19,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-12-14 11:42:19,101 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:42:19,109 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 21 treesize of output 7 [2022-12-14 11:42:19,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 119 [2022-12-14 11:42:19,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:19,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:42:19,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 175 treesize of output 195 [2022-12-14 11:42:19,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:19,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 24 treesize of output 14 [2022-12-14 11:42:19,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:42:19,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-12-14 11:42:19,222 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 21 treesize of output 7 [2022-12-14 11:42:19,388 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:42:20,626 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18541#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:42:20,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:42:20,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:42:20,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 95 [2022-12-14 11:42:20,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470646332] [2022-12-14 11:42:20,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:42:20,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-12-14 11:42:20,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:42:20,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-12-14 11:42:20,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=9955, Unknown=0, NotChecked=0, Total=10302 [2022-12-14 11:42:20,629 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 95 states, 95 states have (on average 2.1789473684210527) internal successors, (207), 95 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:43:14,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:43:14,270 INFO L93 Difference]: Finished difference Result 426 states and 452 transitions. [2022-12-14 11:43:14,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2022-12-14 11:43:14,270 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.1789473684210527) internal successors, (207), 95 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-12-14 11:43:14,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:43:14,271 INFO L225 Difference]: With dead ends: 426 [2022-12-14 11:43:14,271 INFO L226 Difference]: Without dead ends: 424 [2022-12-14 11:43:14,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46904 ImplicationChecksByTransitivity, 51.3s TimeCoverageRelationStatistics Valid=7027, Invalid=143129, Unknown=0, NotChecked=0, Total=150156 [2022-12-14 11:43:14,278 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 919 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 4258 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 4890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 4258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:43:14,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 752 Invalid, 4890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 4258 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-12-14 11:43:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-12-14 11:43:14,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 75. [2022-12-14 11:43:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:43:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-12-14 11:43:14,371 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2022-12-14 11:43:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:43:14,372 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-12-14 11:43:14,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.1789473684210527) internal successors, (207), 95 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:43:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-12-14 11:43:14,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 11:43:14,372 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:43:14,372 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 11:43:14,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 11:43:14,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 11:43:14,573 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:43:14,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:43:14,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1805730742, now seen corresponding path program 28 times [2022-12-14 11:43:14,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:43:14,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473281504] [2022-12-14 11:43:14,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:43:14,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:43:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:43:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:16,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:43:16,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473281504] [2022-12-14 11:43:16,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473281504] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:43:16,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871368477] [2022-12-14 11:43:16,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:43:16,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:43:16,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:43:16,015 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:43:16,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 11:43:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:43:16,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-14 11:43:16,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:43:16,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:43:16,589 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 18 treesize of output 7 [2022-12-14 11:43:16,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:43:18,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 11:43:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:18,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:43:19,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:43:19,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:43:19,459 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 54 treesize of output 41 [2022-12-14 11:43:19,466 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:43:19,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 35 [2022-12-14 11:43:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:19,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871368477] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:43:19,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [167503078] [2022-12-14 11:43:19,907 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:43:19,907 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:43:19,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:43:19,908 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:43:19,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:43:19,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:19,932 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:43:19,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:43:19,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:19,940 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:43:19,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:19,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:43:19,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 269 treesize of output 311 [2022-12-14 11:43:20,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,018 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 194 treesize of output 198 [2022-12-14 11:43:20,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,030 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 196 treesize of output 200 [2022-12-14 11:43:20,041 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 187 treesize of output 185 [2022-12-14 11:43:20,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:43:20,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 58 treesize of output 61 [2022-12-14 11:43:20,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:43:20,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 62 [2022-12-14 11:43:20,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:43:20,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 62 [2022-12-14 11:43:20,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 58 [2022-12-14 11:43:20,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:43:20,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:43:20,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:43:20,450 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 21 treesize of output 7 [2022-12-14 11:43:20,467 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 62 treesize of output 19 [2022-12-14 11:43:20,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 242 [2022-12-14 11:43:20,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:43:20,544 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:43:20,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,562 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 70 treesize of output 56 [2022-12-14 11:43:20,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:20,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-12-14 11:43:20,610 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 21 treesize of output 7 [2022-12-14 11:43:20,654 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 21 treesize of output 7 [2022-12-14 11:43:20,828 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:43:22,076 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20358#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:43:22,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:43:22,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:43:22,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 34] total 99 [2022-12-14 11:43:22,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139277137] [2022-12-14 11:43:22,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:43:22,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-12-14 11:43:22,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:43:22,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-12-14 11:43:22,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=10770, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 11:43:22,078 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:44:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:44:19,186 INFO L93 Difference]: Finished difference Result 489 states and 517 transitions. [2022-12-14 11:44:19,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 331 states. [2022-12-14 11:44:19,187 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-12-14 11:44:19,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:44:19,189 INFO L225 Difference]: With dead ends: 489 [2022-12-14 11:44:19,189 INFO L226 Difference]: Without dead ends: 487 [2022-12-14 11:44:19,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60505 ImplicationChecksByTransitivity, 55.0s TimeCoverageRelationStatistics Valid=9107, Invalid=179683, Unknown=0, NotChecked=0, Total=188790 [2022-12-14 11:44:19,197 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1811 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 4551 mSolverCounterSat, 733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1811 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 5284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 733 IncrementalHoareTripleChecker+Valid, 4551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:44:19,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1811 Valid, 784 Invalid, 5284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 4551 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-12-14 11:44:19,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-12-14 11:44:19,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 78. [2022-12-14 11:44:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:44:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-12-14 11:44:19,279 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2022-12-14 11:44:19,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:44:19,280 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-12-14 11:44:19,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:44:19,280 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-12-14 11:44:19,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 11:44:19,280 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:44:19,280 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 11:44:19,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 11:44:19,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:44:19,481 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:44:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:44:19,482 INFO L85 PathProgramCache]: Analyzing trace with hash -53875671, now seen corresponding path program 29 times [2022-12-14 11:44:19,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:44:19,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829999575] [2022-12-14 11:44:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:19,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:44:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 552 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:44:20,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:44:20,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829999575] [2022-12-14 11:44:20,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829999575] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:44:20,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137358934] [2022-12-14 11:44:20,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:44:20,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:44:20,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:44:20,724 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:44:20,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 11:44:34,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-12-14 11:44:34,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:44:34,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 11:44:34,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:44:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 610 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:44:35,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:44:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 610 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:44:36,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137358934] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:44:36,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [823337142] [2022-12-14 11:44:36,013 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:44:36,013 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:44:36,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:44:36,014 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:44:36,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:44:36,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,047 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:44:36,047 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 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 11:44:36,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,074 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:44:36,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:44:36,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-12-14 11:44:36,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 315 treesize of output 353 [2022-12-14 11:44:36,169 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 233 treesize of output 237 [2022-12-14 11:44:36,185 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 235 treesize of output 239 [2022-12-14 11:44:36,198 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 223 treesize of output 216 [2022-12-14 11:44:36,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:44:36,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 100 treesize of output 77 [2022-12-14 11:44:36,478 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 3 [2022-12-14 11:44:36,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 367 treesize of output 396 [2022-12-14 11:44:36,504 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 354 treesize of output 347 [2022-12-14 11:44:36,583 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 3 [2022-12-14 11:44:36,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:44:36,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-12-14 11:44:36,649 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 21 treesize of output 7 [2022-12-14 11:44:36,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:44:36,661 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 39 treesize of output 17 [2022-12-14 11:44:36,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 177 [2022-12-14 11:44:36,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:44:36,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 76 [2022-12-14 11:44:36,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-12-14 11:44:36,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,715 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 82 treesize of output 76 [2022-12-14 11:44:36,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:36,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-12-14 11:44:36,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-12-14 11:44:36,794 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 21 treesize of output 7 [2022-12-14 11:44:36,921 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:44:37,791 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22370#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:44:37,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:44:37,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:44:37,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 34] total 100 [2022-12-14 11:44:37,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934128565] [2022-12-14 11:44:37,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:44:37,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-12-14 11:44:37,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:44:37,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-12-14 11:44:37,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2186, Invalid=9156, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 11:44:37,794 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 100 states, 100 states have (on average 2.25) internal successors, (225), 100 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:44:38,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:44:38,897 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2022-12-14 11:44:38,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 11:44:38,898 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.25) internal successors, (225), 100 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-12-14 11:44:38,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:44:38,898 INFO L225 Difference]: With dead ends: 145 [2022-12-14 11:44:38,898 INFO L226 Difference]: Without dead ends: 79 [2022-12-14 11:44:38,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7221 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3385, Invalid=13645, Unknown=0, NotChecked=0, Total=17030 [2022-12-14 11:44:38,899 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 218 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:44:38,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 238 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:44:38,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-14 11:44:38,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-12-14 11:44:38,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:44:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-12-14 11:44:38,978 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 77 [2022-12-14 11:44:38,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:44:38,978 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-12-14 11:44:38,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.25) internal successors, (225), 100 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:44:38,978 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-12-14 11:44:38,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 11:44:38,978 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:44:38,978 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 1, 1, 1, 1, 1, 1] [2022-12-14 11:44:38,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 11:44:39,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-14 11:44:39,180 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:44:39,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:44:39,180 INFO L85 PathProgramCache]: Analyzing trace with hash 79753479, now seen corresponding path program 30 times [2022-12-14 11:44:39,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:44:39,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945559171] [2022-12-14 11:44:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:39,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:44:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:44:40,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:44:40,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945559171] [2022-12-14 11:44:40,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945559171] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:44:40,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120659612] [2022-12-14 11:44:40,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:44:40,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:44:40,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:44:40,934 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:44:40,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 11:44:41,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:44:41,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:44:41,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 89 conjunts are in the unsatisfiable core [2022-12-14 11:44:41,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:44:41,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:44:41,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 87 [2022-12-14 11:44:41,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 63 treesize of output 93 [2022-12-14 11:44:41,584 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 50 treesize of output 38 [2022-12-14 11:44:41,589 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 9 [2022-12-14 11:44:41,602 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 50 treesize of output 38 [2022-12-14 11:44:41,608 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 9 [2022-12-14 11:44:41,614 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 50 treesize of output 38 [2022-12-14 11:44:41,618 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 9 [2022-12-14 11:44:41,640 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 22 [2022-12-14 11:44:41,646 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 7 treesize of output 3 [2022-12-14 11:44:41,648 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 23 treesize of output 22 [2022-12-14 11:44:43,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-12-14 11:44:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:44:43,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:44:44,934 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:44:44,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:44:44,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:44:44,977 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:44:44,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 54 [2022-12-14 11:44:44,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-12-14 11:44:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:44:45,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120659612] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:44:45,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2086750231] [2022-12-14 11:44:45,599 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:44:45,599 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:44:45,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:44:45,600 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:44:45,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:44:45,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,625 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:44:45,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:44:45,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,634 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:44:45,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:44:45,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 316 [2022-12-14 11:44:45,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,732 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 215 treesize of output 219 [2022-12-14 11:44:45,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,745 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 217 treesize of output 221 [2022-12-14 11:44:45,756 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 208 treesize of output 206 [2022-12-14 11:44:45,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:44:45,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 62 [2022-12-14 11:44:45,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:44:45,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 58 treesize of output 61 [2022-12-14 11:44:45,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:44:45,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 94 [2022-12-14 11:44:45,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,927 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 38 treesize of output 14 [2022-12-14 11:44:45,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 132 treesize of output 96 [2022-12-14 11:44:45,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:45,980 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 38 treesize of output 14 [2022-12-14 11:44:46,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:46,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:44:46,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:46,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-12-14 11:44:46,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:46,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 14 [2022-12-14 11:44:46,096 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:44:46,105 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 21 treesize of output 7 [2022-12-14 11:44:46,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 119 [2022-12-14 11:44:46,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:44:46,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:44:46,174 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 33 treesize of output 21 [2022-12-14 11:44:46,179 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 21 treesize of output 7 [2022-12-14 11:44:46,188 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 87 treesize of output 62 [2022-12-14 11:44:46,194 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 62 treesize of output 19 [2022-12-14 11:44:46,310 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:44:47,528 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23303#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:44:47,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:44:47,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:44:47,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 104 [2022-12-14 11:44:47,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513629301] [2022-12-14 11:44:47,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:44:47,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-12-14 11:44:47,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:44:47,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-12-14 11:44:47,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=11832, Unknown=0, NotChecked=0, Total=12210 [2022-12-14 11:44:47,530 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 104 states, 104 states have (on average 2.1923076923076925) internal successors, (228), 104 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:45:59,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:45:59,736 INFO L93 Difference]: Finished difference Result 518 states and 547 transitions. [2022-12-14 11:45:59,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 351 states. [2022-12-14 11:45:59,736 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.1923076923076925) internal successors, (228), 104 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-12-14 11:45:59,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:45:59,739 INFO L225 Difference]: With dead ends: 518 [2022-12-14 11:45:59,739 INFO L226 Difference]: Without dead ends: 516 [2022-12-14 11:45:59,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 457 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68138 ImplicationChecksByTransitivity, 68.4s TimeCoverageRelationStatistics Valid=9012, Invalid=201210, Unknown=0, NotChecked=0, Total=210222 [2022-12-14 11:45:59,749 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1343 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 5423 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 6197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 5423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:45:59,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1343 Valid, 976 Invalid, 6197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 5423 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-12-14 11:45:59,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-12-14 11:45:59,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 82. [2022-12-14 11:45:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:45:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-12-14 11:45:59,849 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 78 [2022-12-14 11:45:59,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:45:59,849 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-12-14 11:45:59,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.1923076923076925) internal successors, (228), 104 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:45:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-12-14 11:45:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 11:45:59,850 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:45:59,850 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 11, 1, 1, 1, 1, 1, 1] [2022-12-14 11:45:59,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 11:46:00,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:00,051 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:46:00,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:00,052 INFO L85 PathProgramCache]: Analyzing trace with hash 824255052, now seen corresponding path program 31 times [2022-12-14 11:46:00,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:00,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107051735] [2022-12-14 11:46:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:00,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:01,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:01,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107051735] [2022-12-14 11:46:01,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107051735] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:46:01,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853286953] [2022-12-14 11:46:01,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:46:01,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:01,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:01,604 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:46:01,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 11:46:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:01,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-14 11:46:01,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:02,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:46:02,250 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 18 treesize of output 7 [2022-12-14 11:46:02,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:46:03,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 11:46:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:03,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:46:05,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:46:05,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:46:05,384 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:46:05,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 35 [2022-12-14 11:46:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:06,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853286953] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:46:06,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1109709515] [2022-12-14 11:46:06,019 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:46:06,019 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:46:06,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:46:06,020 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:46:06,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:46:06,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,048 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:46:06,049 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 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 11:46:06,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,076 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:46:06,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:46:06,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-12-14 11:46:06,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 287 treesize of output 333 [2022-12-14 11:46:06,162 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 191 treesize of output 195 [2022-12-14 11:46:06,177 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 193 treesize of output 197 [2022-12-14 11:46:06,190 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 181 treesize of output 174 [2022-12-14 11:46:06,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:46:06,247 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:46:06,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 116 [2022-12-14 11:46:06,279 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 62 treesize of output 19 [2022-12-14 11:46:06,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-12-14 11:46:06,386 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 3 [2022-12-14 11:46:06,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:46:06,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:46:06,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:46:06,476 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 86 treesize of output 70 [2022-12-14 11:46:06,483 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 62 treesize of output 19 [2022-12-14 11:46:06,493 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 86 treesize of output 70 [2022-12-14 11:46:06,500 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 62 treesize of output 19 [2022-12-14 11:46:06,514 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 21 treesize of output 7 [2022-12-14 11:46:06,538 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:46:06,543 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 21 treesize of output 10 [2022-12-14 11:46:06,548 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 3 [2022-12-14 11:46:06,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:06,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-12-14 11:46:06,562 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 54 treesize of output 40 [2022-12-14 11:46:06,567 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 40 treesize of output 19 [2022-12-14 11:46:06,580 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 30 treesize of output 16 [2022-12-14 11:46:06,726 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:46:07,727 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25431#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:46:07,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:46:07,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:46:07,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 37] total 108 [2022-12-14 11:46:07,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519939849] [2022-12-14 11:46:07,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:46:07,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-12-14 11:46:07,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:07,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-12-14 11:46:07,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=12719, Unknown=0, NotChecked=0, Total=13110 [2022-12-14 11:46:07,730 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 108 states, 108 states have (on average 2.2037037037037037) internal successors, (238), 108 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:47:25,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:25,051 INFO L93 Difference]: Finished difference Result 587 states and 618 transitions. [2022-12-14 11:47:25,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 397 states. [2022-12-14 11:47:25,051 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.2037037037037037) internal successors, (238), 108 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-12-14 11:47:25,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:25,054 INFO L225 Difference]: With dead ends: 587 [2022-12-14 11:47:25,055 INFO L226 Difference]: Without dead ends: 585 [2022-12-14 11:47:25,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 508 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86023 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=11451, Invalid=248139, Unknown=0, NotChecked=0, Total=259590 [2022-12-14 11:47:25,066 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1862 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 5919 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1862 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 6760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 5919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:25,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1862 Valid, 1024 Invalid, 6760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 5919 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-12-14 11:47:25,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-12-14 11:47:25,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 85. [2022-12-14 11:47:25,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:47:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-12-14 11:47:25,167 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 81 [2022-12-14 11:47:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:25,167 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-12-14 11:47:25,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.2037037037037037) internal successors, (238), 108 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:47:25,168 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-12-14 11:47:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 11:47:25,168 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:25,168 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 11, 1, 1, 1, 1, 1, 1] [2022-12-14 11:47:25,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-14 11:47:25,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:25,369 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:47:25,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:25,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1059499751, now seen corresponding path program 32 times [2022-12-14 11:47:25,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:25,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59533638] [2022-12-14 11:47:25,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:25,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 673 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:26,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:26,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59533638] [2022-12-14 11:47:26,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59533638] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:26,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130878168] [2022-12-14 11:47:26,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:47:26,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:26,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:26,687 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:26,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 11:47:37,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-12-14 11:47:37,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:47:37,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 11:47:37,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 737 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:38,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 737 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:40,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130878168] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:47:40,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1752880723] [2022-12-14 11:47:40,146 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:47:40,146 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:47:40,146 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:47:40,146 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:47:40,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:47:40,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,175 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:47:40,175 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 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 11:47:40,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,196 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:47:40,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:47:40,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-12-14 11:47:40,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 301 treesize of output 343 [2022-12-14 11:47:40,303 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 212 treesize of output 216 [2022-12-14 11:47:40,320 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 214 treesize of output 218 [2022-12-14 11:47:40,334 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 202 treesize of output 195 [2022-12-14 11:47:40,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:47:40,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 328 [2022-12-14 11:47:40,449 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 62 treesize of output 19 [2022-12-14 11:47:40,459 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 209 treesize of output 202 [2022-12-14 11:47:40,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 88 [2022-12-14 11:47:40,526 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 62 treesize of output 19 [2022-12-14 11:47:40,544 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 3 [2022-12-14 11:47:40,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 103 treesize of output 71 [2022-12-14 11:47:40,575 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 21 treesize of output 7 [2022-12-14 11:47:40,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:47:40,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:47:40,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:47:40,698 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 21 treesize of output 7 [2022-12-14 11:47:40,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 235 [2022-12-14 11:47:40,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:47:40,790 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 21 treesize of output 7 [2022-12-14 11:47:40,801 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:47:40,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:47:40,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 26 treesize of output 18 [2022-12-14 11:47:40,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:40,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2022-12-14 11:47:40,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-12-14 11:47:40,982 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:47:41,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27770#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:47:41,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:47:41,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:47:41,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 37] total 109 [2022-12-14 11:47:41,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097482525] [2022-12-14 11:47:41,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:47:41,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-12-14 11:47:41,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:41,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-12-14 11:47:41,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2586, Invalid=10754, Unknown=0, NotChecked=0, Total=13340 [2022-12-14 11:47:41,653 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 109 states, 109 states have (on average 2.256880733944954) internal successors, (246), 109 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:47:42,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:42,902 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2022-12-14 11:47:42,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 11:47:42,903 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.256880733944954) internal successors, (246), 109 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-12-14 11:47:42,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:42,903 INFO L225 Difference]: With dead ends: 158 [2022-12-14 11:47:42,903 INFO L226 Difference]: Without dead ends: 86 [2022-12-14 11:47:42,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8554 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3989, Invalid=16033, Unknown=0, NotChecked=0, Total=20022 [2022-12-14 11:47:42,905 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 246 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:42,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 246 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:47:42,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-12-14 11:47:43,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-12-14 11:47:43,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:47:43,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-12-14 11:47:43,012 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2022-12-14 11:47:43,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:43,012 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-12-14 11:47:43,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.256880733944954) internal successors, (246), 109 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:47:43,012 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-12-14 11:47:43,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 11:47:43,013 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:43,013 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 12, 1, 1, 1, 1, 1, 1] [2022-12-14 11:47:43,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 11:47:43,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-14 11:47:43,214 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:47:43,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:43,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1028133961, now seen corresponding path program 33 times [2022-12-14 11:47:43,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:43,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587708772] [2022-12-14 11:47:43,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:43,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 815 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:45,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:45,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587708772] [2022-12-14 11:47:45,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587708772] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:45,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858174464] [2022-12-14 11:47:45,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:47:45,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:45,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:45,176 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:45,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 11:47:45,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:47:45,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:47:45,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-14 11:47:45,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:45,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:47:45,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2022-12-14 11:47:45,969 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 24 treesize of output 7 [2022-12-14 11:47:45,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 115 [2022-12-14 11:47:45,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 58 [2022-12-14 11:47:46,044 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 42 treesize of output 30 [2022-12-14 11:47:46,060 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 9 [2022-12-14 11:47:46,067 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 18 treesize of output 7 [2022-12-14 11:47:46,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:47:47,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-12-14 11:47:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 815 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:47,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:49,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:47:49,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:47:49,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:47:49,299 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:47:49,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 54 [2022-12-14 11:47:49,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-12-14 11:47:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 815 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:49,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858174464] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:47:49,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [383317478] [2022-12-14 11:47:49,952 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:47:49,952 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:47:49,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:47:49,953 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:47:49,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:47:49,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:49,978 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:47:49,979 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 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 11:47:49,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,003 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:47:50,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:47:50,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-12-14 11:47:50,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 276 [2022-12-14 11:47:50,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,101 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 152 treesize of output 156 [2022-12-14 11:47:50,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,115 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 154 treesize of output 158 [2022-12-14 11:47:50,126 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 145 treesize of output 143 [2022-12-14 11:47:50,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 11:47:50,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 284 [2022-12-14 11:47:50,336 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 259 treesize of output 255 [2022-12-14 11:47:50,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 281 [2022-12-14 11:47:50,412 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 11 treesize of output 7 [2022-12-14 11:47:50,441 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 11 treesize of output 7 [2022-12-14 11:47:50,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 11:47:50,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,467 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 13 treesize of output 7 [2022-12-14 11:47:50,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:47:50,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:47:50,484 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:47:50,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:47:50,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:47:50,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:47:50,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 74 treesize of output 60 [2022-12-14 11:47:50,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-12-14 11:47:50,589 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:47:50,608 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 21 treesize of output 7 [2022-12-14 11:47:50,618 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 3 [2022-12-14 11:47:50,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:50,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-12-14 11:47:50,634 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 42 treesize of output 30 [2022-12-14 11:47:50,639 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 30 treesize of output 16 [2022-12-14 11:47:50,653 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 40 treesize of output 19 [2022-12-14 11:47:50,789 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:47:51,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28786#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:47:51,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:47:51,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:47:51,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 113 [2022-12-14 11:47:51,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16946405] [2022-12-14 11:47:51,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:47:51,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-12-14 11:47:51,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:51,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-12-14 11:47:51,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=13871, Unknown=0, NotChecked=0, Total=14280 [2022-12-14 11:47:51,849 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 113 states, 113 states have (on average 2.2035398230088497) internal successors, (249), 113 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:32,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:32,617 INFO L93 Difference]: Finished difference Result 619 states and 651 transitions. [2022-12-14 11:49:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 419 states. [2022-12-14 11:49:32,617 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.2035398230088497) internal successors, (249), 113 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-12-14 11:49:32,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:32,618 INFO L225 Difference]: With dead ends: 619 [2022-12-14 11:49:32,618 INFO L226 Difference]: Without dead ends: 617 [2022-12-14 11:49:32,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 534 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95943 ImplicationChecksByTransitivity, 94.7s TimeCoverageRelationStatistics Valid=11313, Invalid=275447, Unknown=0, NotChecked=0, Total=286760 [2022-12-14 11:49:32,631 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1310 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 6383 mSolverCounterSat, 907 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 7290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 907 IncrementalHoareTripleChecker+Valid, 6383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:32,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1310 Valid, 1111 Invalid, 7290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [907 Valid, 6383 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2022-12-14 11:49:32,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-12-14 11:49:32,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 89. [2022-12-14 11:49:32,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:32,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-12-14 11:49:32,754 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2022-12-14 11:49:32,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:32,754 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-12-14 11:49:32,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.2035398230088497) internal successors, (249), 113 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:32,754 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-12-14 11:49:32,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 11:49:32,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:32,754 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 12, 1, 1, 1, 1, 1, 1] [2022-12-14 11:49:32,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-14 11:49:32,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-14 11:49:32,955 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:49:32,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:32,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1732321226, now seen corresponding path program 34 times [2022-12-14 11:49:32,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:49:32,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939347875] [2022-12-14 11:49:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:32,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:49:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 0 proven. 883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:49:34,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:49:34,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939347875] [2022-12-14 11:49:34,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939347875] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:49:34,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517310494] [2022-12-14 11:49:34,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:49:34,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:49:34,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:49:34,706 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:49:34,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417d8ef3-4fc4-4d0e-94e3-7516f8514f40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 11:49:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:34,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 11:49:34,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:35,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 43 [2022-12-14 11:49:35,423 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 18 treesize of output 7 [2022-12-14 11:49:35,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 11:49:37,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 11:49:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 0 proven. 883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:49:37,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:39,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:49:39,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 11:49:39,249 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 54 treesize of output 41 [2022-12-14 11:49:39,255 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:49:39,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 35 [2022-12-14 11:49:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 0 proven. 883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:49:40,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517310494] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:40,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [341609505] [2022-12-14 11:49:40,036 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 11:49:40,036 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:49:40,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:49:40,036 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:49:40,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:49:40,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:40,067 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:49:40,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:49:40,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:40,075 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:49:40,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:40,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-12-14 11:49:40,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:40,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 243 [2022-12-14 11:49:40,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:49:40,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:40,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:40,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:40,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:40,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 143 [2022-12-14 11:49:40,229 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:49:40,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:40,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:40,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:40,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 212 [2022-12-14 11:49:40,290 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 21 treesize of output 7 [2022-12-14 11:49:40,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:40,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 140 treesize of output 116 [2022-12-14 11:49:40,328 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 40 treesize of output 19 [2022-12-14 11:49:40,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:40,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 11:49:40,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-12-14 11:49:40,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:40,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:49:40,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:49:40,475 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 46 treesize of output 14 [2022-12-14 11:49:40,481 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 21 treesize of output 7 [2022-12-14 11:49:40,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:49:40,499 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 52 treesize of output 16 [2022-12-14 11:49:40,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 240 [2022-12-14 11:49:40,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:40,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-12-14 11:49:40,610 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 21 treesize of output 7 [2022-12-14 11:49:40,622 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 138 [2022-12-14 11:49:40,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:40,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2022-12-14 11:49:40,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-12-14 11:49:40,657 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:49:40,788 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:49:42,089 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31249#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:49:42,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:49:42,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:49:42,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 40] total 117 [2022-12-14 11:49:42,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903736389] [2022-12-14 11:49:42,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:49:42,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-12-14 11:49:42,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:49:42,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-12-14 11:49:42,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=14830, Unknown=0, NotChecked=0, Total=15252 [2022-12-14 11:49:42,092 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 117 states, 117 states have (on average 2.213675213675214) internal successors, (259), 117 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)