./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/indp2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/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_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/indp2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/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_d890f99d-87ea-4a8e-b4fc-7837cac346e4/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 22448626353835b24dede83f92858a925e988e04b05430a9ca91763be927cf92 --- 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 12:34:06,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:34:06,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:34:06,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:34:06,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:34:06,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:34:06,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:34:06,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:34:06,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:34:06,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:34:06,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:34:06,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:34:06,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:34:06,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:34:06,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:34:06,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:34:06,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:34:06,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:34:06,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:34:06,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:34:06,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:34:06,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:34:06,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:34:06,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:34:06,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:34:06,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:34:06,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:34:06,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:34:06,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:34:06,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:34:06,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:34:06,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:34:06,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:34:06,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:34:06,755 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:34:06,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:34:06,756 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:34:06,756 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:34:06,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:34:06,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:34:06,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:34:06,759 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:34:06,781 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:34:06,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:34:06,782 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:34:06,782 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:34:06,783 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:34:06,783 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:34:06,783 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:34:06,783 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:34:06,784 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:34:06,784 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:34:06,784 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:34:06,784 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:34:06,784 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:34:06,785 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:34:06,785 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:34:06,785 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:34:06,785 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:34:06,785 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:34:06,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:34:06,786 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:34:06,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:34:06,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:34:06,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:34:06,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:34:06,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:34:06,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:34:06,788 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:34:06,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:34:06,788 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:34:06,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:34:06,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:34:06,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:34:06,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:34:06,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:34:06,789 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:34:06,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:34:06,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:34:06,790 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:34:06,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:34:06,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:34:06,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:34:06,790 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_d890f99d-87ea-4a8e-b4fc-7837cac346e4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22448626353835b24dede83f92858a925e988e04b05430a9ca91763be927cf92 [2022-12-14 12:34:07,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:34:07,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:34:07,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:34:07,033 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:34:07,034 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:34:07,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-fpi/indp2.c [2022-12-14 12:34:09,532 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:34:09,659 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:34:09,659 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/sv-benchmarks/c/array-fpi/indp2.c [2022-12-14 12:34:09,664 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/data/3ce580ed4/ab52aea27f954735ab2df25c1c77f31d/FLAG44e2db8c5 [2022-12-14 12:34:10,084 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/data/3ce580ed4/ab52aea27f954735ab2df25c1c77f31d [2022-12-14 12:34:10,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:34:10,088 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:34:10,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:34:10,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:34:10,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:34:10,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:34:10" (1/1) ... [2022-12-14 12:34:10,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ee1f08d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:10, skipping insertion in model container [2022-12-14 12:34:10,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:34:10" (1/1) ... [2022-12-14 12:34:10,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:34:10,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:34:10,207 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_d890f99d-87ea-4a8e-b4fc-7837cac346e4/sv-benchmarks/c/array-fpi/indp2.c[588,601] [2022-12-14 12:34:10,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:34:10,226 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:34:10,235 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_d890f99d-87ea-4a8e-b4fc-7837cac346e4/sv-benchmarks/c/array-fpi/indp2.c[588,601] [2022-12-14 12:34:10,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:34:10,249 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:34:10,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:10 WrapperNode [2022-12-14 12:34:10,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:34:10,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:34:10,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:34:10,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:34:10,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:10" (1/1) ... [2022-12-14 12:34:10,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:10" (1/1) ... [2022-12-14 12:34:10,276 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2022-12-14 12:34:10,276 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:34:10,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:34:10,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:34:10,277 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:34:10,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:10" (1/1) ... [2022-12-14 12:34:10,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:10" (1/1) ... [2022-12-14 12:34:10,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:10" (1/1) ... [2022-12-14 12:34:10,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:10" (1/1) ... [2022-12-14 12:34:10,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:10" (1/1) ... [2022-12-14 12:34:10,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:10" (1/1) ... [2022-12-14 12:34:10,292 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:10" (1/1) ... [2022-12-14 12:34:10,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:10" (1/1) ... [2022-12-14 12:34:10,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:34:10,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:34:10,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:34:10,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:34:10,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:10" (1/1) ... [2022-12-14 12:34:10,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:34:10,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:10,323 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:34:10,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:34:10,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:34:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:34:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 12:34:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 12:34:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:34:10,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:34:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 12:34:10,410 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:34:10,412 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:34:10,542 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:34:10,580 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:34:10,580 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 12:34:10,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:34:10 BoogieIcfgContainer [2022-12-14 12:34:10,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:34:10,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:34:10,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:34:10,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:34:10,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:34:10" (1/3) ... [2022-12-14 12:34:10,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de740e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:34:10, skipping insertion in model container [2022-12-14 12:34:10,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:10" (2/3) ... [2022-12-14 12:34:10,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de740e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:34:10, skipping insertion in model container [2022-12-14 12:34:10,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:34:10" (3/3) ... [2022-12-14 12:34:10,592 INFO L112 eAbstractionObserver]: Analyzing ICFG indp2.c [2022-12-14 12:34:10,611 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:34:10,612 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:34:10,648 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:34:10,653 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;@50c2c369, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:34:10,653 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:34:10,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:10,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 12:34:10,663 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:10,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:10,664 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:10,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:10,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1718194540, now seen corresponding path program 1 times [2022-12-14 12:34:10,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:10,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201921544] [2022-12-14 12:34:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:10,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:10,865 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 12:34:10,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:10,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201921544] [2022-12-14 12:34:10,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201921544] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:34:10,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:34:10,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:34:10,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910993969] [2022-12-14 12:34:10,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:34:10,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:34:10,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:10,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:34:10,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:34:10,897 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:10,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:10,953 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2022-12-14 12:34:10,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:34:10,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 12:34:10,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:10,964 INFO L225 Difference]: With dead ends: 22 [2022-12-14 12:34:10,965 INFO L226 Difference]: Without dead ends: 11 [2022-12-14 12:34:10,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:34:10,971 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:10,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:34:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-14 12:34:11,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-12-14 12:34:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:11,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-12-14 12:34:11,005 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 8 [2022-12-14 12:34:11,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:11,005 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-12-14 12:34:11,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:11,006 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2022-12-14 12:34:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 12:34:11,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:11,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:11,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:34:11,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:11,008 INFO L85 PathProgramCache]: Analyzing trace with hash 473790610, now seen corresponding path program 1 times [2022-12-14 12:34:11,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:11,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673020621] [2022-12-14 12:34:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:11,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:11,030 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:34:11,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238715506] [2022-12-14 12:34:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:11,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:11,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:11,032 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:11,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:34:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:11,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:34:11,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:34:11,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:34:11,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:11,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673020621] [2022-12-14 12:34:11,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:34:11,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238715506] [2022-12-14 12:34:11,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238715506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:34:11,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:34:11,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:34:11,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307596320] [2022-12-14 12:34:11,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:34:11,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:34:11,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:11,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:34:11,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:34:11,147 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:11,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:11,181 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-12-14 12:34:11,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:34:11,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 12:34:11,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:11,182 INFO L225 Difference]: With dead ends: 24 [2022-12-14 12:34:11,183 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 12:34:11,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 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 12:34:11,184 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:11,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 6 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:34:11,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 12:34:11,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-12-14 12:34:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:11,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-12-14 12:34:11,190 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2022-12-14 12:34:11,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:11,191 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-12-14 12:34:11,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:11,191 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-12-14 12:34:11,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 12:34:11,191 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:11,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:11,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:34:11,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:11,393 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:11,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:11,393 INFO L85 PathProgramCache]: Analyzing trace with hash -905852742, now seen corresponding path program 1 times [2022-12-14 12:34:11,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:11,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368983237] [2022-12-14 12:34:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:11,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:11,407 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:34:11,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998491662] [2022-12-14 12:34:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:11,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:11,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:11,408 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:11,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:34:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:11,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 12:34:11,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:11,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-12-14 12:34:11,552 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 25 treesize of output 13 [2022-12-14 12:34:11,575 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 15 [2022-12-14 12:34:11,623 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 12:34:11,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:34:11,718 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 20 treesize of output 18 [2022-12-14 12:34:11,722 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 26 treesize of output 24 [2022-12-14 12:34:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:34:11,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:11,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368983237] [2022-12-14 12:34:11,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:34:11,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998491662] [2022-12-14 12:34:11,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998491662] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:34:11,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [854264611] [2022-12-14 12:34:11,752 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:34:11,752 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:34:11,755 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:34:11,759 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:34:11,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:34:11,844 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:34:11,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:34:11,877 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 12:34:11,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 110 [2022-12-14 12:34:12,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:12,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:12,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:12,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:12,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:12,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:12,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:12,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:34:12,071 INFO L321 Elim1Store]: treesize reduction 112, result has 20.0 percent of original size [2022-12-14 12:34:12,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 35 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 379 treesize of output 376 [2022-12-14 12:34:12,168 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 20 treesize of output 18 [2022-12-14 12:34:12,186 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 35 treesize of output 21 [2022-12-14 12:34:12,208 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 35 treesize of output 21 [2022-12-14 12:34:12,226 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 35 treesize of output 21 [2022-12-14 12:34:12,241 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 17 treesize of output 9 [2022-12-14 12:34:12,259 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 12:34:12,280 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 12:34:12,302 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:34:12,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '222#(and (= (ite (= |ULTIMATE.start_main_#t~mem12#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem12#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:34:12,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:34:12,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:34:12,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-12-14 12:34:12,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680734660] [2022-12-14 12:34:12,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:34:12,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 12:34:12,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:12,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 12:34:12,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-12-14 12:34:12,573 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 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 12:34:12,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:12,736 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-12-14 12:34:12,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 12:34:12,737 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 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) Word has length 11 [2022-12-14 12:34:12,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:12,737 INFO L225 Difference]: With dead ends: 35 [2022-12-14 12:34:12,738 INFO L226 Difference]: Without dead ends: 33 [2022-12-14 12:34:12,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-12-14 12:34:12,739 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:12,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 36 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:34:12,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-14 12:34:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 17. [2022-12-14 12:34:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:12,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-12-14 12:34:12,745 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 11 [2022-12-14 12:34:12,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:12,745 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-12-14 12:34:12,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 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 12:34:12,746 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-12-14 12:34:12,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 12:34:12,746 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:12,746 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:12,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:34:12,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:12,948 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:12,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:12,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1202207386, now seen corresponding path program 2 times [2022-12-14 12:34:12,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:12,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566350962] [2022-12-14 12:34:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:12,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:12,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:34:12,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575635322] [2022-12-14 12:34:12,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:34:12,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:12,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:12,965 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:12,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:34:13,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:34:13,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:34:13,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 12:34:13,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:34:13,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:34:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:34:13,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:13,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566350962] [2022-12-14 12:34:13,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:34:13,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575635322] [2022-12-14 12:34:13,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575635322] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:34:13,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1725099795] [2022-12-14 12:34:13,255 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:34:13,255 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:34:13,256 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:34:13,256 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:34:13,256 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:34:13,310 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 12:34:13,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 12:34:13,356 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:34:13,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:34:13,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 119 [2022-12-14 12:34:13,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:13,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:13,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:13,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:13,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:13,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:13,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:13,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:13,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:13,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:13,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:13,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:13,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:13,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:13,502 INFO L321 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2022-12-14 12:34:13,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 43 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 12 case distinctions, treesize of input 390 treesize of output 381 [2022-12-14 12:34:13,578 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 20 treesize of output 18 [2022-12-14 12:34:13,589 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 35 treesize of output 21 [2022-12-14 12:34:13,605 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 35 treesize of output 21 [2022-12-14 12:34:13,622 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 35 treesize of output 21 [2022-12-14 12:34:13,633 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 12:34:13,653 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 12:34:13,669 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 12:34:13,681 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:34:13,870 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '399#(and (= (ite (= |ULTIMATE.start_main_#t~mem12#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem12#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:34:13,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:34:13,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:34:13,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-12-14 12:34:13,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057131694] [2022-12-14 12:34:13,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:34:13,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 12:34:13,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:13,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 12:34:13,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:34:13,872 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:14,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:14,010 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2022-12-14 12:34:14,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:34:14,010 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 12:34:14,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:14,011 INFO L225 Difference]: With dead ends: 69 [2022-12-14 12:34:14,011 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 12:34:14,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-12-14 12:34:14,012 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:14,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 34 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:34:14,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 12:34:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2022-12-14 12:34:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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 12:34:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-12-14 12:34:14,020 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 13 [2022-12-14 12:34:14,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:14,020 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-12-14 12:34:14,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:14,021 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-12-14 12:34:14,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 12:34:14,021 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:14,021 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:14,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:34:14,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:14,223 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:14,224 INFO L85 PathProgramCache]: Analyzing trace with hash 472268986, now seen corresponding path program 3 times [2022-12-14 12:34:14,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:14,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181291497] [2022-12-14 12:34:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:14,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:14,268 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:34:14,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751903298] [2022-12-14 12:34:14,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:34:14,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:14,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:14,270 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:14,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:34:14,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:34:14,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:34:14,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 12:34:14,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:14,343 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 22 treesize of output 18 [2022-12-14 12:34:14,355 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 37 treesize of output 36 [2022-12-14 12:34:14,374 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 35 [2022-12-14 12:34:14,445 INFO L321 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2022-12-14 12:34:14,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 31 [2022-12-14 12:34:14,490 INFO L321 Elim1Store]: treesize reduction 20, result has 47.4 percent of original size [2022-12-14 12:34:14,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 39 [2022-12-14 12:34:14,552 INFO L321 Elim1Store]: treesize reduction 20, result has 47.4 percent of original size [2022-12-14 12:34:14,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 56 [2022-12-14 12:34:14,667 INFO L321 Elim1Store]: treesize reduction 47, result has 6.0 percent of original size [2022-12-14 12:34:14,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 24 [2022-12-14 12:34:14,717 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 12:34:14,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-12-14 12:34:14,768 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 12:34:14,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-12-14 12:34:14,853 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 40 treesize of output 28 [2022-12-14 12:34:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:34:14,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:34:16,779 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_114| Int) (|v_ULTIMATE.start_main_~i~0#1_113| Int) (v_ArrVal_114 Int) (v_ArrVal_112 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_114| 1) |v_ULTIMATE.start_main_~i~0#1_113|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_114|)) (= (select (store (store (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 1))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_114|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_112) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_113|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_114) |c_ULTIMATE.start_main_~a~0#1.offset|) 0))) is different from false [2022-12-14 12:34:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-12-14 12:34:19,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:19,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181291497] [2022-12-14 12:34:19,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:34:19,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751903298] [2022-12-14 12:34:19,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751903298] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:34:19,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2045205385] [2022-12-14 12:34:19,319 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:34:19,319 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:34:19,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:34:19,319 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:34:19,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:34:19,371 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:34:19,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:34:19,383 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 12:34:19,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 119 [2022-12-14 12:34:19,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:19,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:19,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:19,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:19,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:19,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:19,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:19,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:19,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:19,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:19,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:19,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:19,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:19,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:19,551 INFO L321 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2022-12-14 12:34:19,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 43 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 12 case distinctions, treesize of input 390 treesize of output 381 [2022-12-14 12:34:19,598 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 20 treesize of output 18 [2022-12-14 12:34:19,609 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 15 treesize of output 7 [2022-12-14 12:34:19,630 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 35 treesize of output 21 [2022-12-14 12:34:19,644 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 35 treesize of output 21 [2022-12-14 12:34:19,655 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 12:34:19,671 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 12:34:19,690 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 12:34:19,700 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:34:20,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '696#(and (= (ite (= |ULTIMATE.start_main_#t~mem12#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem12#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:34:20,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:34:20,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:34:20,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-12-14 12:34:20,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836636073] [2022-12-14 12:34:20,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:34:20,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 12:34:20,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:20,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 12:34:20,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=869, Unknown=1, NotChecked=60, Total=1056 [2022-12-14 12:34:20,046 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:28,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-12-14 12:34:38,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:38,637 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2022-12-14 12:34:38,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 12:34:38,637 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 12:34:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:38,638 INFO L225 Difference]: With dead ends: 93 [2022-12-14 12:34:38,638 INFO L226 Difference]: Without dead ends: 86 [2022-12-14 12:34:38,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=734, Invalid=4969, Unknown=1, NotChecked=148, Total=5852 [2022-12-14 12:34:38,640 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 85 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:38,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 298 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 713 Invalid, 1 Unknown, 61 Unchecked, 3.1s Time] [2022-12-14 12:34:38,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-12-14 12:34:38,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 37. [2022-12-14 12:34:38,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 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 12:34:38,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-12-14 12:34:38,654 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 17 [2022-12-14 12:34:38,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:38,654 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-12-14 12:34:38,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:38,654 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-12-14 12:34:38,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 12:34:38,655 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:38,655 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:38,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:34:38,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:38,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:38,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:38,858 INFO L85 PathProgramCache]: Analyzing trace with hash -917036790, now seen corresponding path program 1 times [2022-12-14 12:34:38,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:38,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41945458] [2022-12-14 12:34:38,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:38,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:38,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:34:38,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074150294] [2022-12-14 12:34:38,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:38,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:38,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:38,893 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:38,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:34:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:38,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 12:34:38,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:38,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:34:38,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:38,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 12:34:39,003 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 31 treesize of output 15 [2022-12-14 12:34:39,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:39,031 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 12:34:39,046 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 17 [2022-12-14 12:34:39,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:34:39,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:34:39,234 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 20 treesize of output 18 [2022-12-14 12:34:39,236 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 26 treesize of output 22 [2022-12-14 12:34:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:34:39,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:39,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41945458] [2022-12-14 12:34:39,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:34:39,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074150294] [2022-12-14 12:34:39,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074150294] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:34:39,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1301092480] [2022-12-14 12:34:39,269 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 12:34:39,269 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:34:39,269 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:34:39,269 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:34:39,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:34:39,329 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 12:34:39,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 12:34:39,374 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:34:39,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:34:39,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 110 [2022-12-14 12:34:39,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:39,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:39,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:39,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:39,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:39,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:39,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:39,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:34:39,507 INFO L321 Elim1Store]: treesize reduction 112, result has 20.0 percent of original size [2022-12-14 12:34:39,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 35 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 379 treesize of output 376 [2022-12-14 12:34:39,594 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 20 treesize of output 18 [2022-12-14 12:34:39,602 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 35 treesize of output 21 [2022-12-14 12:34:39,616 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 35 treesize of output 21 [2022-12-14 12:34:39,630 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 35 treesize of output 21 [2022-12-14 12:34:39,639 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 12:34:39,653 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 12:34:39,674 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 12:34:39,709 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:34:40,024 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1110#(and (= (ite (= |ULTIMATE.start_main_#t~mem12#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem12#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:34:40,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:34:40,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:34:40,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2022-12-14 12:34:40,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589030859] [2022-12-14 12:34:40,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:34:40,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 12:34:40,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:40,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 12:34:40,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-12-14 12:34:40,025 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 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 12:34:40,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:40,670 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2022-12-14 12:34:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 12:34:40,670 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 12:34:40,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:40,671 INFO L225 Difference]: With dead ends: 88 [2022-12-14 12:34:40,671 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 12:34:40,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=200, Invalid=1360, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 12:34:40,673 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 59 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:40,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 108 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:34:40,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 12:34:40,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 44. [2022-12-14 12:34:40,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 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 12:34:40,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-12-14 12:34:40,689 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 17 [2022-12-14 12:34:40,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:40,689 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-12-14 12:34:40,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 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 12:34:40,689 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-12-14 12:34:40,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 12:34:40,690 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:40,690 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:40,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:34:40,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:40,892 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:40,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:40,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1339557521, now seen corresponding path program 4 times [2022-12-14 12:34:40,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:40,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238301557] [2022-12-14 12:34:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:40,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:40,905 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:34:40,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896939395] [2022-12-14 12:34:40,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:34:40,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:40,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:40,907 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:40,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:34:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:40,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 12:34:40,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:34:41,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:34:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:34:41,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:41,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238301557] [2022-12-14 12:34:41,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:34:41,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896939395] [2022-12-14 12:34:41,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896939395] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:34:41,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1662369403] [2022-12-14 12:34:41,050 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:34:41,050 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:34:41,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:34:41,051 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:34:41,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:34:41,107 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 12:34:41,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 12:34:41,148 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:34:41,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:34:41,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 110 [2022-12-14 12:34:41,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:41,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:41,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:41,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:41,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:41,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:41,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:41,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:34:41,264 INFO L321 Elim1Store]: treesize reduction 112, result has 20.0 percent of original size [2022-12-14 12:34:41,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 35 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 379 treesize of output 376 [2022-12-14 12:34:41,360 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 20 treesize of output 18 [2022-12-14 12:34:41,371 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 35 treesize of output 21 [2022-12-14 12:34:41,387 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 35 treesize of output 21 [2022-12-14 12:34:41,403 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 35 treesize of output 21 [2022-12-14 12:34:41,413 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 17 treesize of output 9 [2022-12-14 12:34:41,429 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 12:34:41,443 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 12:34:41,454 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:34:41,676 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1466#(and (= (ite (= |ULTIMATE.start_main_#t~mem12#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem12#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:34:41,677 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:34:41,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:34:41,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-12-14 12:34:41,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879090725] [2022-12-14 12:34:41,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:34:41,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 12:34:41,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:41,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 12:34:41,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-12-14 12:34:41,678 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:41,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:41,884 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2022-12-14 12:34:41,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:34:41,885 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 12:34:41,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:41,885 INFO L225 Difference]: With dead ends: 121 [2022-12-14 12:34:41,886 INFO L226 Difference]: Without dead ends: 89 [2022-12-14 12:34:41,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-12-14 12:34:41,887 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 77 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:41,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 56 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:34:41,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-14 12:34:41,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 56. [2022-12-14 12:34:41,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 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 12:34:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-12-14 12:34:41,908 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 18 [2022-12-14 12:34:41,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:41,908 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-12-14 12:34:41,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:41,908 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-12-14 12:34:41,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 12:34:41,909 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:41,909 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:41,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:34:42,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:42,109 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:42,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:42,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1859537353, now seen corresponding path program 5 times [2022-12-14 12:34:42,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:42,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38947698] [2022-12-14 12:34:42,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:42,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:42,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:34:42,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100014738] [2022-12-14 12:34:42,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:34:42,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:42,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:42,121 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:42,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:34:42,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:34:42,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:34:42,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 12:34:42,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:34:42,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:34:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:34:42,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:42,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38947698] [2022-12-14 12:34:42,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:34:42,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100014738] [2022-12-14 12:34:42,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100014738] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:34:42,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1087023164] [2022-12-14 12:34:42,304 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:34:42,304 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:34:42,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:34:42,304 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:34:42,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:34:42,356 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:34:42,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:34:42,367 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 12:34:42,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 110 [2022-12-14 12:34:42,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:42,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:42,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:42,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:42,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:42,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:42,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:42,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:34:42,489 INFO L321 Elim1Store]: treesize reduction 112, result has 20.0 percent of original size [2022-12-14 12:34:42,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 35 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 379 treesize of output 376 [2022-12-14 12:34:42,549 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 20 treesize of output 18 [2022-12-14 12:34:42,559 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 15 treesize of output 7 [2022-12-14 12:34:42,575 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 35 treesize of output 21 [2022-12-14 12:34:42,588 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 35 treesize of output 21 [2022-12-14 12:34:42,597 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 17 treesize of output 9 [2022-12-14 12:34:42,610 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 12:34:42,624 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 12:34:42,635 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:34:42,841 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1885#(and (= (ite (= |ULTIMATE.start_main_#t~mem12#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem12#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:34:42,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:34:42,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:34:42,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-12-14 12:34:42,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789158641] [2022-12-14 12:34:42,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:34:42,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 12:34:42,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:42,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 12:34:42,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:34:42,843 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:43,043 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2022-12-14 12:34:43,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 12:34:43,043 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 12:34:43,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:43,044 INFO L225 Difference]: With dead ends: 92 [2022-12-14 12:34:43,044 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 12:34:43,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2022-12-14 12:34:43,045 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 64 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:43,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 88 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:34:43,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 12:34:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2022-12-14 12:34:43,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 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 12:34:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-12-14 12:34:43,068 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 19 [2022-12-14 12:34:43,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:43,068 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-12-14 12:34:43,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:43,068 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-12-14 12:34:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 12:34:43,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:43,069 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:43,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 12:34:43,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 12:34:43,271 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:43,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:43,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1815822740, now seen corresponding path program 6 times [2022-12-14 12:34:43,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:43,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136781461] [2022-12-14 12:34:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:43,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:43,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:34:43,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377963845] [2022-12-14 12:34:43,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:34:43,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:43,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:43,321 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:43,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:34:43,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:34:43,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:34:43,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 12:34:43,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:43,429 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 22 treesize of output 18 [2022-12-14 12:34:43,438 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 37 treesize of output 36 [2022-12-14 12:34:43,450 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 37 treesize of output 36 [2022-12-14 12:34:43,467 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 35 [2022-12-14 12:34:43,529 INFO L321 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2022-12-14 12:34:43,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 31 [2022-12-14 12:34:43,572 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:34:43,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2022-12-14 12:34:43,633 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:34:43,634 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 1 case distinctions, treesize of input 58 treesize of output 67 [2022-12-14 12:34:43,703 INFO L321 Elim1Store]: treesize reduction 20, result has 47.4 percent of original size [2022-12-14 12:34:43,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 63 [2022-12-14 12:34:43,814 INFO L321 Elim1Store]: treesize reduction 47, result has 6.0 percent of original size [2022-12-14 12:34:43,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 24 [2022-12-14 12:34:43,866 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 12:34:43,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-12-14 12:34:43,918 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 12:34:43,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-12-14 12:34:43,966 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 12:34:43,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-12-14 12:34:44,060 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 40 treesize of output 28 [2022-12-14 12:34:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:34:44,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:34:46,234 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_246| Int) (|v_ULTIMATE.start_main_~i~0#1_247| Int) (v_ArrVal_319 Int) (v_ArrVal_318 Int) (v_ArrVal_316 Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_247|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_247| 1) |v_ULTIMATE.start_main_~i~0#1_246|)) (= (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_316) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_247|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_318) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_246|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_319) |c_ULTIMATE.start_main_~a~0#1.offset|) 0))) is different from false [2022-12-14 12:34:48,252 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_246| Int) (|v_ULTIMATE.start_main_~i~0#1_248| Int) (|v_ULTIMATE.start_main_~i~0#1_247| Int) (v_ArrVal_319 Int) (v_ArrVal_318 Int) (v_ArrVal_316 Int)) (or (= (select (store (store (store (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 1))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_248|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_316) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_247|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_318) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_246|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_319) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_248| 1) |v_ULTIMATE.start_main_~i~0#1_247|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_247| 1) |v_ULTIMATE.start_main_~i~0#1_246|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_248|)))) is different from false [2022-12-14 12:34:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2022-12-14 12:34:52,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:52,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136781461] [2022-12-14 12:34:52,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:34:52,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377963845] [2022-12-14 12:34:52,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377963845] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:34:52,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1086762336] [2022-12-14 12:34:52,428 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:34:52,428 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:34:52,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:34:52,428 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:34:52,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:34:52,471 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 12:34:52,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 12:34:52,512 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:34:52,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:34:52,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 119 [2022-12-14 12:34:52,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:52,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:52,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:52,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:52,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:52,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:52,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:52,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:52,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:52,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:52,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:52,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:52,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:52,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:52,706 INFO L321 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2022-12-14 12:34:52,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 43 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 12 case distinctions, treesize of input 390 treesize of output 381 [2022-12-14 12:34:52,775 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 20 treesize of output 18 [2022-12-14 12:34:52,785 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 15 treesize of output 7 [2022-12-14 12:34:52,805 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 35 treesize of output 21 [2022-12-14 12:34:52,818 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 35 treesize of output 21 [2022-12-14 12:34:52,825 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 17 treesize of output 9 [2022-12-14 12:34:52,836 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 12:34:52,850 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 12:34:52,861 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:34:53,243 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2281#(and (= (ite (= |ULTIMATE.start_main_#t~mem12#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem12#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:34:53,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:34:53,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:34:53,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-12-14 12:34:53,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180468133] [2022-12-14 12:34:53,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:34:53,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 12:34:53,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:53,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 12:34:53,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1179, Unknown=2, NotChecked=142, Total=1482 [2022-12-14 12:34:53,244 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 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 12:35:22,934 WARN L233 SmtUtils]: Spent 6.74s on a formula simplification. DAG size of input: 155 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:35:32,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-12-14 12:35:51,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:35:51,924 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2022-12-14 12:35:51,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 12:35:51,925 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 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) Word has length 20 [2022-12-14 12:35:51,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:35:51,926 INFO L225 Difference]: With dead ends: 95 [2022-12-14 12:35:51,926 INFO L226 Difference]: Without dead ends: 93 [2022-12-14 12:35:51,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 1317 ImplicationChecksByTransitivity, 60.2s TimeCoverageRelationStatistics Valid=779, Invalid=5233, Unknown=2, NotChecked=306, Total=6320 [2022-12-14 12:35:51,929 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 112 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 100 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:35:51,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 214 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 689 Invalid, 6 Unknown, 88 Unchecked, 7.3s Time] [2022-12-14 12:35:51,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-14 12:35:51,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 50. [2022-12-14 12:35:51,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 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 12:35:51,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-12-14 12:35:51,956 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 20 [2022-12-14 12:35:51,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:35:51,956 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-12-14 12:35:51,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 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 12:35:51,956 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-12-14 12:35:51,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 12:35:51,957 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:35:51,957 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:35:51,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 12:35:52,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:35:52,158 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:35:52,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:35:52,160 INFO L85 PathProgramCache]: Analyzing trace with hash -321092721, now seen corresponding path program 7 times [2022-12-14 12:35:52,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:35:52,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781112622] [2022-12-14 12:35:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:35:52,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:35:52,191 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:35:52,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817326187] [2022-12-14 12:35:52,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:35:52,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:35:52,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:35:52,192 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:35:52,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:35:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:35:52,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 12:35:52,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:35:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:35:52,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:35:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:35:52,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:35:52,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781112622] [2022-12-14 12:35:52,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:35:52,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817326187] [2022-12-14 12:35:52,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817326187] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:35:52,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1727262111] [2022-12-14 12:35:52,381 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:35:52,381 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:35:52,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:35:52,381 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:35:52,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:35:52,430 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:35:52,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:35:52,441 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 12:35:52,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 110 [2022-12-14 12:35:52,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:52,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:52,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:52,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:52,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:52,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:52,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:52,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:35:52,564 INFO L321 Elim1Store]: treesize reduction 112, result has 20.0 percent of original size [2022-12-14 12:35:52,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 35 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 379 treesize of output 376 [2022-12-14 12:35:52,624 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 20 treesize of output 18 [2022-12-14 12:35:52,634 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 35 treesize of output 21 [2022-12-14 12:35:52,650 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 35 treesize of output 21 [2022-12-14 12:35:52,663 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 35 treesize of output 21 [2022-12-14 12:35:52,673 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 17 treesize of output 9 [2022-12-14 12:35:52,687 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 12:35:52,704 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 12:35:52,711 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:35:52,884 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2736#(and (= (ite (= |ULTIMATE.start_main_#t~mem12#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem12#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:35:52,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:35:52,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:35:52,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2022-12-14 12:35:52,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464509926] [2022-12-14 12:35:52,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:35:52,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 12:35:52,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:35:52,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 12:35:52,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-12-14 12:35:52,886 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 12:35:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:35:53,163 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2022-12-14 12:35:53,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 12:35:53,163 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) Word has length 21 [2022-12-14 12:35:53,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:35:53,164 INFO L225 Difference]: With dead ends: 118 [2022-12-14 12:35:53,164 INFO L226 Difference]: Without dead ends: 102 [2022-12-14 12:35:53,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2022-12-14 12:35:53,165 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:35:53,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 72 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:35:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-14 12:35:53,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 64. [2022-12-14 12:35:53,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 63 states have internal predecessors, (74), 0 states have call successors, (0), 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 12:35:53,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2022-12-14 12:35:53,205 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 21 [2022-12-14 12:35:53,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:35:53,205 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2022-12-14 12:35:53,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 12:35:53,205 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2022-12-14 12:35:53,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 12:35:53,206 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:35:53,206 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:35:53,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 12:35:53,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:35:53,408 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:35:53,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:35:53,409 INFO L85 PathProgramCache]: Analyzing trace with hash 767814185, now seen corresponding path program 8 times [2022-12-14 12:35:53,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:35:53,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948567808] [2022-12-14 12:35:53,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:35:53,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:35:53,445 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:35:53,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478608032] [2022-12-14 12:35:53,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:35:53,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:35:53,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:35:53,448 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:35:53,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:35:53,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 12:35:53,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:35:53,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 12:35:53,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:35:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 12:35:53,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:35:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 12:35:53,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:35:53,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948567808] [2022-12-14 12:35:53,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:35:53,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478608032] [2022-12-14 12:35:53,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478608032] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:35:53,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [208573977] [2022-12-14 12:35:53,736 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:35:53,736 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:35:53,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:35:53,737 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:35:53,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:35:53,781 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:35:53,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:35:53,793 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 12:35:53,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 119 [2022-12-14 12:35:53,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:53,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:53,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:53,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:53,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:53,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:53,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:53,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:53,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:53,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:53,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:53,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:53,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:53,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:53,897 INFO L321 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2022-12-14 12:35:53,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 43 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 12 case distinctions, treesize of input 390 treesize of output 381 [2022-12-14 12:35:53,941 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 20 treesize of output 18 [2022-12-14 12:35:53,950 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 15 treesize of output 7 [2022-12-14 12:35:53,961 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 35 treesize of output 21 [2022-12-14 12:35:53,975 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 35 treesize of output 21 [2022-12-14 12:35:53,983 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 17 treesize of output 9 [2022-12-14 12:35:53,994 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 12:35:54,007 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 12:35:54,016 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:35:54,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3191#(and (= (ite (= |ULTIMATE.start_main_#t~mem12#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem12#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:35:54,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:35:54,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:35:54,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-12-14 12:35:54,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717263025] [2022-12-14 12:35:54,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:35:54,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 12:35:54,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:35:54,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 12:35:54,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-12-14 12:35:54,180 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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 12:35:54,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:35:54,476 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2022-12-14 12:35:54,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 12:35:54,477 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) Word has length 22 [2022-12-14 12:35:54,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:35:54,477 INFO L225 Difference]: With dead ends: 114 [2022-12-14 12:35:54,477 INFO L226 Difference]: Without dead ends: 91 [2022-12-14 12:35:54,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 12:35:54,479 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 82 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:35:54,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 119 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:35:54,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-12-14 12:35:54,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2022-12-14 12:35:54,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 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 12:35:54,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2022-12-14 12:35:54,538 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 22 [2022-12-14 12:35:54,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:35:54,538 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2022-12-14 12:35:54,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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 12:35:54,538 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2022-12-14 12:35:54,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 12:35:54,539 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:35:54,539 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:35:54,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 12:35:54,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:35:54,740 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:35:54,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:35:54,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1972303686, now seen corresponding path program 9 times [2022-12-14 12:35:54,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:35:54,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187253053] [2022-12-14 12:35:54,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:35:54,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:35:54,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:35:54,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053488487] [2022-12-14 12:35:54,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:35:54,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:35:54,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:35:54,789 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:35:54,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:35:54,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:35:54,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:35:54,913 WARN L261 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-14 12:35:54,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:35:54,920 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 22 treesize of output 18 [2022-12-14 12:35:54,927 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 37 treesize of output 36 [2022-12-14 12:35:54,938 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 37 treesize of output 36 [2022-12-14 12:35:54,947 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 37 treesize of output 36 [2022-12-14 12:35:54,959 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 35 [2022-12-14 12:35:55,019 INFO L321 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2022-12-14 12:35:55,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 31 [2022-12-14 12:35:55,056 INFO L321 Elim1Store]: treesize reduction 20, result has 47.4 percent of original size [2022-12-14 12:35:55,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 39 [2022-12-14 12:35:55,106 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:35:55,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 63 [2022-12-14 12:35:55,179 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:35:55,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 74 [2022-12-14 12:35:55,277 INFO L321 Elim1Store]: treesize reduction 20, result has 47.4 percent of original size [2022-12-14 12:35:55,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 70 [2022-12-14 12:35:55,425 INFO L321 Elim1Store]: treesize reduction 47, result has 6.0 percent of original size [2022-12-14 12:35:55,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 24 [2022-12-14 12:35:55,891 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 12:35:55,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-12-14 12:35:55,945 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 12:35:55,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-12-14 12:35:57,873 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 12:35:57,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-12-14 12:35:57,927 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 12:35:57,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-12-14 12:36:00,020 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 40 treesize of output 28 [2022-12-14 12:36:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:36:00,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:36:04,096 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_366| Int) (|v_ULTIMATE.start_main_~i~0#1_365| Int) (v_ArrVal_529 Int) (v_ArrVal_527 Int) (v_ArrVal_525 Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_366|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_366| 1) |v_ULTIMATE.start_main_~i~0#1_365|)) (= (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_525) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_366|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_527) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_365|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_529) |c_ULTIMATE.start_main_~a~0#1.offset|) 0))) is different from false [2022-12-14 12:36:06,114 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_367| Int) (|v_ULTIMATE.start_main_~i~0#1_366| Int) (|v_ULTIMATE.start_main_~i~0#1_365| Int) (v_ArrVal_529 Int) (v_ArrVal_527 Int) (v_ArrVal_525 Int) (v_ArrVal_523 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_366| 1) |v_ULTIMATE.start_main_~i~0#1_365|)) (= (select (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_523) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_367|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_525) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_366|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_527) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_365|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_529) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_367|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_367| 1) |v_ULTIMATE.start_main_~i~0#1_366|)))) is different from false [2022-12-14 12:36:08,137 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_367| Int) (|v_ULTIMATE.start_main_~i~0#1_366| Int) (|v_ULTIMATE.start_main_~i~0#1_368| Int) (|v_ULTIMATE.start_main_~i~0#1_365| Int) (v_ArrVal_529 Int) (v_ArrVal_527 Int) (v_ArrVal_525 Int) (v_ArrVal_523 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_368| 1) |v_ULTIMATE.start_main_~i~0#1_367|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_366| 1) |v_ULTIMATE.start_main_~i~0#1_365|)) (= (select (store (store (store (store (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 1))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_368|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_523) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_367|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_525) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_366|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_527) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_365|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_529) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_368|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_367| 1) |v_ULTIMATE.start_main_~i~0#1_366|)))) is different from false [2022-12-14 12:36:13,808 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2022-12-14 12:36:13,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:36:13,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187253053] [2022-12-14 12:36:13,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:36:13,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053488487] [2022-12-14 12:36:13,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053488487] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:36:13,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [690980485] [2022-12-14 12:36:13,810 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:36:13,810 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:36:13,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:36:13,810 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:36:13,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:36:13,866 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 12:36:13,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 12:36:13,899 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:36:13,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:36:13,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 110 [2022-12-14 12:36:13,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:36:13,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:36:13,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:36:13,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:36:13,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:36:13,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:36:13,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:36:13,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:36:14,022 INFO L321 Elim1Store]: treesize reduction 112, result has 20.0 percent of original size [2022-12-14 12:36:14,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 35 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 379 treesize of output 376 [2022-12-14 12:36:14,146 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 20 treesize of output 18 [2022-12-14 12:36:14,156 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 35 treesize of output 21 [2022-12-14 12:36:14,170 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 35 treesize of output 21 [2022-12-14 12:36:14,182 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 35 treesize of output 21 [2022-12-14 12:36:14,191 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 12:36:14,205 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 12:36:14,219 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 12:36:14,228 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:36:14,639 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3666#(and (= (ite (= |ULTIMATE.start_main_#t~mem12#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem12#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:36:14,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:36:14,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:36:14,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-12-14 12:36:14,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944417382] [2022-12-14 12:36:14,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:36:14,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 12:36:14,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:36:14,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 12:36:14,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1532, Unknown=6, NotChecked=246, Total=1980 [2022-12-14 12:36:14,641 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 40 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:36:20,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:36:28,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:36:32,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:36:37,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:36:39,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:36:40,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:36:41,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:36:48,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 12:36:52,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 12:37:00,308 WARN L233 SmtUtils]: Spent 7.35s on a formula simplification. DAG size of input: 177 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:37:01,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-12-14 12:37:06,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-12-14 12:37:07,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-12-14 12:37:08,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-12-14 12:37:20,198 WARN L233 SmtUtils]: Spent 11.58s on a formula simplification. DAG size of input: 183 DAG size of output: 129 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:37:21,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:37:22,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 12:37:23,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 12:37:30,514 WARN L233 SmtUtils]: Spent 5.52s on a formula simplification. DAG size of input: 100 DAG size of output: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:37:31,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:37:34,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-12-14 12:37:40,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-12-14 12:38:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:38:19,890 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2022-12-14 12:38:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 12:38:19,891 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 12:38:19,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:38:19,891 INFO L225 Difference]: With dead ends: 111 [2022-12-14 12:38:19,892 INFO L226 Difference]: Without dead ends: 109 [2022-12-14 12:38:19,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 3 IntricatePredicates, 2 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 110.8s TimeCoverageRelationStatistics Valid=742, Invalid=5723, Unknown=27, NotChecked=480, Total=6972 [2022-12-14 12:38:19,893 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 76 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 98 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 33.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:38:19,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 373 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 957 Invalid, 25 Unknown, 158 Unchecked, 33.0s Time] [2022-12-14 12:38:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-12-14 12:38:19,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 68. [2022-12-14 12:38:19,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 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 12:38:19,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-12-14 12:38:19,946 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 23 [2022-12-14 12:38:19,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:38:19,947 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-12-14 12:38:19,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:38:19,947 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-12-14 12:38:19,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 12:38:19,947 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:38:19,947 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:38:19,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 12:38:20,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 12:38:20,149 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:38:20,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:38:20,150 INFO L85 PathProgramCache]: Analyzing trace with hash -507383430, now seen corresponding path program 2 times [2022-12-14 12:38:20,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:38:20,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583743621] [2022-12-14 12:38:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:38:20,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:38:20,160 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:38:20,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445797119] [2022-12-14 12:38:20,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:38:20,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:38:20,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:38:20,161 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:38:20,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d890f99d-87ea-4a8e-b4fc-7837cac346e4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 12:38:20,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:38:20,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:38:20,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-14 12:38:20,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:38:20,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:38:20,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:38:20,342 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 26 treesize of output 25 [2022-12-14 12:38:20,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:38:20,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-12-14 12:38:20,381 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 31 treesize of output 15 [2022-12-14 12:38:20,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:38:20,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-12-14 12:38:20,446 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 25 treesize of output 24 [2022-12-14 12:38:20,483 INFO L321 Elim1Store]: treesize reduction 18, result has 59.1 percent of original size [2022-12-14 12:38:20,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2022-12-14 12:38:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:38:20,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:38:21,460 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 128 treesize of output 120 [2022-12-14 12:38:21,498 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 12:38:21,499 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 177978 treesize of output 173114 [2022-12-14 12:39:07,770 WARN L233 SmtUtils]: Spent 8.31s on a formula simplification. DAG size of input: 701 DAG size of output: 701 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:39:16,557 WARN L233 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 697 DAG size of output: 697 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:39:26,470 WARN L233 SmtUtils]: Spent 7.81s on a formula simplification. DAG size of input: 693 DAG size of output: 693 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:39:50,460 WARN L233 SmtUtils]: Spent 7.49s on a formula simplification. DAG size of input: 669 DAG size of output: 669 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:40:04,335 WARN L233 SmtUtils]: Spent 7.79s on a formula simplification. DAG size of input: 659 DAG size of output: 659 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:40:15,364 WARN L233 SmtUtils]: Spent 7.09s on a formula simplification. DAG size of input: 659 DAG size of output: 659 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:40:23,963 WARN L233 SmtUtils]: Spent 7.72s on a formula simplification. DAG size of input: 659 DAG size of output: 659 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:40:35,422 WARN L233 SmtUtils]: Spent 6.80s on a formula simplification. DAG size of input: 659 DAG size of output: 659 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:40:42,761 WARN L233 SmtUtils]: Spent 6.52s on a formula simplification. DAG size of input: 659 DAG size of output: 659 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:40:52,835 WARN L233 SmtUtils]: Spent 6.74s on a formula simplification. DAG size of input: 659 DAG size of output: 659 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:41:00,063 WARN L233 SmtUtils]: Spent 6.42s on a formula simplification. DAG size of input: 659 DAG size of output: 659 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:41:07,512 WARN L233 SmtUtils]: Spent 6.49s on a formula simplification. DAG size of input: 659 DAG size of output: 659 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:41:16,421 WARN L233 SmtUtils]: Spent 7.23s on a formula simplification. DAG size of input: 659 DAG size of output: 659 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:41:24,254 WARN L233 SmtUtils]: Spent 6.95s on a formula simplification. DAG size of input: 659 DAG size of output: 659 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:41:32,922 WARN L233 SmtUtils]: Spent 7.79s on a formula simplification. DAG size of input: 659 DAG size of output: 659 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:41:43,888 WARN L233 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 499 DAG size of output: 499 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:41:54,465 WARN L233 SmtUtils]: Spent 6.91s on a formula simplification. DAG size of input: 655 DAG size of output: 655 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:42:04,742 WARN L233 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 655 DAG size of output: 655 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:42:10,801 WARN L233 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 626 DAG size of output: 626 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:42:16,618 WARN L233 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 624 DAG size of output: 624 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:42:29,002 WARN L233 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 624 DAG size of output: 624 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:42:34,835 WARN L233 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 622 DAG size of output: 622 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:42:53,706 WARN L233 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 651 DAG size of output: 651 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:43:03,556 WARN L233 SmtUtils]: Spent 6.57s on a formula simplification. DAG size of input: 651 DAG size of output: 651 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:43:13,803 WARN L233 SmtUtils]: Spent 8.62s on a formula simplification. DAG size of input: 681 DAG size of output: 681 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:43:20,298 WARN L233 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 679 DAG size of output: 679 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:43:29,299 WARN L233 SmtUtils]: Spent 8.45s on a formula simplification. DAG size of input: 679 DAG size of output: 679 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:43:36,232 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 677 DAG size of output: 677 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:43:47,282 WARN L233 SmtUtils]: Spent 7.53s on a formula simplification. DAG size of input: 673 DAG size of output: 673 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:43:59,471 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 673 DAG size of output: 673 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:44:07,986 WARN L233 SmtUtils]: Spent 7.61s on a formula simplification. DAG size of input: 673 DAG size of output: 673 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:44:20,665 WARN L233 SmtUtils]: Spent 7.70s on a formula simplification. DAG size of input: 671 DAG size of output: 671 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:44:28,688 WARN L233 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 671 DAG size of output: 671 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:44:37,529 WARN L233 SmtUtils]: Spent 7.85s on a formula simplification. DAG size of input: 671 DAG size of output: 671 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:44:46,635 WARN L233 SmtUtils]: Spent 8.24s on a formula simplification. DAG size of input: 671 DAG size of output: 671 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:45:00,721 WARN L233 SmtUtils]: Spent 7.10s on a formula simplification. DAG size of input: 669 DAG size of output: 669 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:45:11,840 WARN L233 SmtUtils]: Spent 7.49s on a formula simplification. DAG size of input: 669 DAG size of output: 669 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:45:19,803 WARN L233 SmtUtils]: Spent 6.95s on a formula simplification. DAG size of input: 669 DAG size of output: 669 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:45:31,777 WARN L233 SmtUtils]: Spent 7.20s on a formula simplification. DAG size of input: 651 DAG size of output: 651 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:45:39,498 WARN L233 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 651 DAG size of output: 651 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:45:46,635 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 651 DAG size of output: 651 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:45:54,282 WARN L233 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 651 DAG size of output: 651 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:46:01,370 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 651 DAG size of output: 651 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:46:12,246 WARN L233 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 623 DAG size of output: 623 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:46:19,847 WARN L233 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 645 DAG size of output: 645 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:46:31,534 WARN L233 SmtUtils]: Spent 7.89s on a formula simplification. DAG size of input: 667 DAG size of output: 667 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:46:39,656 WARN L233 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 663 DAG size of output: 663 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:46:47,612 WARN L233 SmtUtils]: Spent 6.79s on a formula simplification. DAG size of input: 662 DAG size of output: 662 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:46:59,330 WARN L233 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 644 DAG size of output: 644 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:47:06,262 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 644 DAG size of output: 644 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:47:13,259 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 644 DAG size of output: 644 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:47:20,761 WARN L233 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 644 DAG size of output: 644 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:47:29,669 WARN L233 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 518 DAG size of output: 518 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:47:37,352 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 518 DAG size of output: 518 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:47:42,905 WARN L233 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 518 DAG size of output: 518 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:47:52,938 WARN L233 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 518 DAG size of output: 518 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)