./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifcompf.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_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/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_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifcompf.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/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_fabe215b-b4cc-46a9-b71b-8008b5046a0f/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 c976745169334e455668d4a00daf76f0c92e9088cf6a3d705adecbf8b82b6740 --- 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 13:30:21,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:30:21,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:30:21,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:30:21,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:30:21,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:30:21,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:30:21,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:30:21,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:30:21,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:30:21,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:30:21,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:30:21,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:30:21,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:30:21,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:30:21,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:30:21,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:30:21,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:30:21,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:30:21,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:30:21,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:30:21,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:30:21,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:30:21,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:30:21,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:30:21,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:30:21,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:30:21,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:30:21,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:30:21,635 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:30:21,635 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:30:21,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:30:21,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:30:21,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:30:21,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:30:21,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:30:21,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:30:21,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:30:21,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:30:21,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:30:21,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:30:21,642 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:30:21,671 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:30:21,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:30:21,671 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:30:21,671 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:30:21,672 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:30:21,672 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:30:21,672 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:30:21,672 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:30:21,672 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:30:21,672 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:30:21,673 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:30:21,673 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:30:21,673 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:30:21,673 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:30:21,673 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:30:21,673 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:30:21,673 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:30:21,673 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:30:21,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:30:21,674 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:30:21,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:30:21,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:30:21,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:30:21,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:30:21,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:30:21,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:30:21,674 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:30:21,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:30:21,675 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:30:21,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:30:21,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:30:21,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:30:21,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:30:21,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:30:21,683 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:30:21,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:30:21,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:30:21,683 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:30:21,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:30:21,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:30:21,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:30:21,683 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_fabe215b-b4cc-46a9-b71b-8008b5046a0f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c976745169334e455668d4a00daf76f0c92e9088cf6a3d705adecbf8b82b6740 [2022-12-14 13:30:21,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:30:21,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:30:21,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:30:21,877 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:30:21,878 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:30:21,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-fpi/ifcompf.c [2022-12-14 13:30:24,481 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:30:24,633 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:30:24,633 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/sv-benchmarks/c/array-fpi/ifcompf.c [2022-12-14 13:30:24,639 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/data/876d8ed5e/e0277a48004341639c05d50bd6ae149f/FLAG517f8c5df [2022-12-14 13:30:24,654 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/data/876d8ed5e/e0277a48004341639c05d50bd6ae149f [2022-12-14 13:30:24,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:30:24,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:30:24,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:30:24,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:30:24,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:30:24,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:30:24" (1/1) ... [2022-12-14 13:30:24,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b5e0e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:30:24, skipping insertion in model container [2022-12-14 13:30:24,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:30:24" (1/1) ... [2022-12-14 13:30:24,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:30:24,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:30:24,793 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/sv-benchmarks/c/array-fpi/ifcompf.c[590,603] [2022-12-14 13:30:24,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:30:24,816 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:30:24,825 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_fabe215b-b4cc-46a9-b71b-8008b5046a0f/sv-benchmarks/c/array-fpi/ifcompf.c[590,603] [2022-12-14 13:30:24,832 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:30:24,843 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:30:24,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:30:24 WrapperNode [2022-12-14 13:30:24,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:30:24,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:30:24,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:30:24,844 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:30:24,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:30:24" (1/1) ... [2022-12-14 13:30:24,855 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:30:24" (1/1) ... [2022-12-14 13:30:24,870 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2022-12-14 13:30:24,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:30:24,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:30:24,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:30:24,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:30:24,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:30:24" (1/1) ... [2022-12-14 13:30:24,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:30:24" (1/1) ... [2022-12-14 13:30:24,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:30:24" (1/1) ... [2022-12-14 13:30:24,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:30:24" (1/1) ... [2022-12-14 13:30:24,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:30:24" (1/1) ... [2022-12-14 13:30:24,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:30:24" (1/1) ... [2022-12-14 13:30:24,887 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:30:24" (1/1) ... [2022-12-14 13:30:24,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:30:24" (1/1) ... [2022-12-14 13:30:24,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:30:24,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:30:24,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:30:24,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:30:24,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:30:24" (1/1) ... [2022-12-14 13:30:24,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:30:24,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:24,917 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:30:24,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:30:24,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:30:24,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:30:24,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 13:30:24,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 13:30:24,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:30:24,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:30:24,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 13:30:25,018 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:30:25,020 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:30:25,178 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:30:25,230 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:30:25,230 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 13:30:25,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:30:25 BoogieIcfgContainer [2022-12-14 13:30:25,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:30:25,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:30:25,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:30:25,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:30:25,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:30:24" (1/3) ... [2022-12-14 13:30:25,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3936946d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:30:25, skipping insertion in model container [2022-12-14 13:30:25,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:30:24" (2/3) ... [2022-12-14 13:30:25,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3936946d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:30:25, skipping insertion in model container [2022-12-14 13:30:25,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:30:25" (3/3) ... [2022-12-14 13:30:25,239 INFO L112 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2022-12-14 13:30:25,254 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:30:25,254 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:30:25,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:30:25,296 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;@4493a728, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:30:25,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:30:25,299 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 13:30:25,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 13:30:25,304 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:25,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:30:25,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:30:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:25,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1718302181, now seen corresponding path program 1 times [2022-12-14 13:30:25,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:25,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637459765] [2022-12-14 13:30:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:25,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:25,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:25,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637459765] [2022-12-14 13:30:25,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 13:30:25,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300015571] [2022-12-14 13:30:25,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:25,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:25,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:25,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:30:25,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:30:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:25,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:30:25,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:30:25,585 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 13:30:25,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:30:25,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300015571] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:30:25,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:30:25,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:30:25,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484191690] [2022-12-14 13:30:25,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:30:25,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:30:25,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:30:25,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:30:25,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:30:25,623 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 13:30:25,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:30:25,668 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2022-12-14 13:30:25,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:30:25,671 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 13:30:25,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:30:25,677 INFO L225 Difference]: With dead ends: 22 [2022-12-14 13:30:25,678 INFO L226 Difference]: Without dead ends: 11 [2022-12-14 13:30:25,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 13:30:25,683 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 13:30:25,684 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 13:30:25,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-14 13:30:25,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-12-14 13:30:25,712 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 13:30:25,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-12-14 13:30:25,713 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 8 [2022-12-14 13:30:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:25,714 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-12-14 13:30:25,714 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 13:30:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2022-12-14 13:30:25,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 13:30:25,714 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:25,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:30:25,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:30:25,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 13:30:25,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:30:25,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:25,919 INFO L85 PathProgramCache]: Analyzing trace with hash -278726234, now seen corresponding path program 1 times [2022-12-14 13:30:25,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:25,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885644150] [2022-12-14 13:30:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:25,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:25,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:30:25,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982779550] [2022-12-14 13:30:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:25,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:25,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:26,001 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:30:26,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:30:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:26,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:30:26,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:30:26,130 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 13:30:26,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:30:26,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:26,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885644150] [2022-12-14 13:30:26,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:30:26,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982779550] [2022-12-14 13:30:26,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982779550] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:30:26,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:30:26,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:30:26,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231298505] [2022-12-14 13:30:26,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:30:26,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:30:26,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:30:26,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:30:26,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:30:26,133 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 13:30:26,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:30:26,166 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-12-14 13:30:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:30:26,166 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 13:30:26,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:30:26,167 INFO L225 Difference]: With dead ends: 24 [2022-12-14 13:30:26,167 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 13:30:26,167 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 13:30:26,168 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:30:26,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 6 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:30:26,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 13:30:26,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-12-14 13:30:26,170 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 13:30:26,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-12-14 13:30:26,171 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2022-12-14 13:30:26,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:26,171 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-12-14 13:30:26,171 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 13:30:26,171 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-12-14 13:30:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:30:26,172 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:26,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:30:26,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:30:26,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 13:30:26,374 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:30:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:26,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1790599809, now seen corresponding path program 1 times [2022-12-14 13:30:26,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:26,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149430227] [2022-12-14 13:30:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:26,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:26,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:30:26,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566263888] [2022-12-14 13:30:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:26,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:26,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:26,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:30:26,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:30:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:26,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 13:30:26,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:30:26,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:30:26,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:30:26,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:26,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2022-12-14 13:30:26,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:26,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2022-12-14 13:30:26,814 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 7 treesize of output 3 [2022-12-14 13:30:26,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 13:30:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:30:26,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:26,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149430227] [2022-12-14 13:30:26,825 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:30:26,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566263888] [2022-12-14 13:30:26,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566263888] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:30:26,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [62332167] [2022-12-14 13:30:26,844 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:30:26,844 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:30:26,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:30:26,853 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:30:26,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:30:27,049 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-12-14 13:30:27,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-12-14 13:30:27,247 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-12-14 13:30:27,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-12-14 13:30:27,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:30:27,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:27,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:27,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:27,480 INFO L321 Elim1Store]: treesize reduction 145, result has 12.1 percent of original size [2022-12-14 13:30:27,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 464 treesize of output 486 [2022-12-14 13:30:27,634 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-12-14 13:30:27,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 455 treesize of output 438 [2022-12-14 13:30:27,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:27,655 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 27 treesize of output 28 [2022-12-14 13:30:27,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:27,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-12-14 13:30:27,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:27,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:27,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:27,818 INFO L321 Elim1Store]: treesize reduction 144, result has 7.7 percent of original size [2022-12-14 13:30:27,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 133 [2022-12-14 13:30:27,844 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:27,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-12-14 13:30:27,875 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-12-14 13:30:27,876 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 62 treesize of output 63 [2022-12-14 13:30:27,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 25 [2022-12-14 13:30:27,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:27,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:27,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2022-12-14 13:30:27,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:27,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:27,933 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:30:27,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 13:30:27,941 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 11 treesize of output 7 [2022-12-14 13:30:27,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:27,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:27,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:28,020 INFO L321 Elim1Store]: treesize reduction 144, result has 7.7 percent of original size [2022-12-14 13:30:28,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 130 [2022-12-14 13:30:28,049 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 69 treesize of output 55 [2022-12-14 13:30:28,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:28,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2022-12-14 13:30:28,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:28,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:28,093 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:30:28,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 13:30:28,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:28,117 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:30:28,314 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '240#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 13:30:28,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:30:28,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:30:28,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-12-14 13:30:28,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440856081] [2022-12-14 13:30:28,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:30:28,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 13:30:28,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:30:28,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 13:30:28,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:30:28,316 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 13:30:28,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:30:28,403 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-12-14 13:30:28,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 13:30:28,404 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 13:30:28,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:30:28,404 INFO L225 Difference]: With dead ends: 19 [2022-12-14 13:30:28,404 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 13:30:28,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-12-14 13:30:28,405 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 37 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:30:28,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 10 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:30:28,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 13:30:28,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2022-12-14 13:30:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-12-14 13:30:28,408 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2022-12-14 13:30:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:28,408 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-12-14 13:30:28,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 13:30:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-12-14 13:30:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:30:28,409 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:28,409 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:30:28,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:30:28,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:28,610 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:30:28,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:28,611 INFO L85 PathProgramCache]: Analyzing trace with hash -259950584, now seen corresponding path program 1 times [2022-12-14 13:30:28,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:28,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201281204] [2022-12-14 13:30:28,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:28,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:28,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:30:28,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992397204] [2022-12-14 13:30:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:28,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:28,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:28,665 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:30:28,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:30:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:28,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:30:28,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:30:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:30:28,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:30:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:30:28,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:28,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201281204] [2022-12-14 13:30:28,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:30:28,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992397204] [2022-12-14 13:30:28,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992397204] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:30:28,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [829021837] [2022-12-14 13:30:28,831 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:30:28,831 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:30:28,832 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:30:28,832 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:30:28,832 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:30:28,963 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-12-14 13:30:28,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-12-14 13:30:28,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-12-14 13:30:29,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:30:29,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:29,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:29,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:29,180 INFO L321 Elim1Store]: treesize reduction 145, result has 12.1 percent of original size [2022-12-14 13:30:29,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 464 treesize of output 486 [2022-12-14 13:30:29,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 44 [2022-12-14 13:30:29,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:29,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 16 [2022-12-14 13:30:29,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-12-14 13:30:29,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:29,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:29,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:29,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:29,503 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:30:29,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 13:30:29,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:29,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:29,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:29,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:29,569 INFO L321 Elim1Store]: treesize reduction 144, result has 7.7 percent of original size [2022-12-14 13:30:29,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 130 [2022-12-14 13:30:29,603 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-12-14 13:30:29,603 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 62 treesize of output 63 [2022-12-14 13:30:29,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 25 [2022-12-14 13:30:29,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:29,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:29,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2022-12-14 13:30:29,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:29,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-12-14 13:30:29,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:29,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:29,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:29,689 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:30:29,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 13:30:29,754 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:30:30,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '389#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 13:30:30,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:30:30,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:30:30,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-12-14 13:30:30,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976975600] [2022-12-14 13:30:30,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:30:30,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 13:30:30,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:30:30,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 13:30:30,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:30:30,083 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:30,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:30:30,149 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-12-14 13:30:30,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:30:30,150 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 13:30:30,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:30:30,150 INFO L225 Difference]: With dead ends: 42 [2022-12-14 13:30:30,150 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 13:30:30,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:30:30,152 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:30:30,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 16 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:30:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 13:30:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2022-12-14 13:30:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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 13:30:30,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-12-14 13:30:30,156 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 14 [2022-12-14 13:30:30,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:30,156 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-12-14 13:30:30,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:30,156 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-12-14 13:30:30,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 13:30:30,156 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:30,157 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:30:30,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 13:30:30,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:30,358 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:30:30,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:30,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1731625634, now seen corresponding path program 2 times [2022-12-14 13:30:30,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:30,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87511641] [2022-12-14 13:30:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:30,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:30,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:30:30,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579007800] [2022-12-14 13:30:30,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:30:30,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:30,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:30,424 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:30:30,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:30:30,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:30:30,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:30:30,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 13:30:30,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:30:30,501 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 98 treesize of output 94 [2022-12-14 13:30:30,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:30,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:30,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 13:30:30,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:30:30,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:30,676 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:30:30,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-12-14 13:30:30,833 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:30:30,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2022-12-14 13:30:30,846 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 13:30:30,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:30:30,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 13:30:31,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:31,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2022-12-14 13:30:31,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:31,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2022-12-14 13:30:31,816 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:31,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-12-14 13:30:31,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:31,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 165 [2022-12-14 13:30:31,838 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 124 treesize of output 118 [2022-12-14 13:30:31,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 13:30:32,032 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 13:30:32,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:32,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87511641] [2022-12-14 13:30:32,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:30:32,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579007800] [2022-12-14 13:30:32,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579007800] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:30:32,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1059704296] [2022-12-14 13:30:32,035 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:30:32,035 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:30:32,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:30:32,036 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:30:32,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:30:32,175 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-12-14 13:30:32,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-12-14 13:30:32,331 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-12-14 13:30:32,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-12-14 13:30:32,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:30:32,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:32,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,497 INFO L321 Elim1Store]: treesize reduction 145, result has 12.1 percent of original size [2022-12-14 13:30:32,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 464 treesize of output 486 [2022-12-14 13:30:32,641 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-12-14 13:30:32,642 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 471 treesize of output 452 [2022-12-14 13:30:32,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2022-12-14 13:30:32,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-12-14 13:30:32,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:32,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:32,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:32,762 INFO L321 Elim1Store]: treesize reduction 144, result has 7.7 percent of original size [2022-12-14 13:30:32,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 130 [2022-12-14 13:30:32,774 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 25 [2022-12-14 13:30:32,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:32,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-12-14 13:30:32,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:32,820 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:30:32,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 13:30:32,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:32,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:32,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:32,898 INFO L321 Elim1Store]: treesize reduction 144, result has 7.7 percent of original size [2022-12-14 13:30:32,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 133 [2022-12-14 13:30:32,931 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-12-14 13:30:32,932 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 73 treesize of output 72 [2022-12-14 13:30:32,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 34 [2022-12-14 13:30:32,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:32,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:32,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 20 [2022-12-14 13:30:32,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:32,975 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 36 treesize of output 37 [2022-12-14 13:30:33,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:33,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:33,009 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:30:33,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 13:30:33,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:33,081 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:30:33,430 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '614#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 13:30:33,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:30:33,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:30:33,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-12-14 13:30:33,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208820084] [2022-12-14 13:30:33,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:30:33,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 13:30:33,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:30:33,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 13:30:33,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=775, Unknown=2, NotChecked=0, Total=930 [2022-12-14 13:30:33,432 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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 13:30:35,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:30:35,169 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-12-14 13:30:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 13:30:35,169 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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 13:30:35,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:30:35,170 INFO L225 Difference]: With dead ends: 82 [2022-12-14 13:30:35,170 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 13:30:35,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=602, Invalid=2818, Unknown=2, NotChecked=0, Total=3422 [2022-12-14 13:30:35,173 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 93 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:30:35,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 62 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:30:35,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 13:30:35,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 31. [2022-12-14 13:30:35,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:35,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-12-14 13:30:35,183 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 17 [2022-12-14 13:30:35,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:35,183 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-12-14 13:30:35,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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 13:30:35,183 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-12-14 13:30:35,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 13:30:35,184 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:35,184 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:30:35,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 13:30:35,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:35,385 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:30:35,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:35,387 INFO L85 PathProgramCache]: Analyzing trace with hash 614232266, now seen corresponding path program 3 times [2022-12-14 13:30:35,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:35,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864609985] [2022-12-14 13:30:35,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:35,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:35,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:30:35,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933402489] [2022-12-14 13:30:35,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:30:35,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:35,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:35,419 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:30:35,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:30:35,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:30:35,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:30:35,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 13:30:35,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:30:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 13:30:35,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:30:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 13:30:35,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:35,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864609985] [2022-12-14 13:30:35,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:30:35,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933402489] [2022-12-14 13:30:35,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933402489] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:30:35,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1907464987] [2022-12-14 13:30:35,545 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:30:35,545 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:30:35,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:30:35,546 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:30:35,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:30:35,667 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-12-14 13:30:35,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-12-14 13:30:35,816 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-12-14 13:30:35,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-12-14 13:30:35,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:30:35,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:35,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:35,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:35,956 INFO L321 Elim1Store]: treesize reduction 145, result has 12.1 percent of original size [2022-12-14 13:30:35,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 464 treesize of output 486 [2022-12-14 13:30:36,037 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-12-14 13:30:36,038 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 469 treesize of output 454 [2022-12-14 13:30:36,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2022-12-14 13:30:36,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-12-14 13:30:36,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:36,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:36,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:36,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:36,235 INFO L321 Elim1Store]: treesize reduction 144, result has 7.7 percent of original size [2022-12-14 13:30:36,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 130 [2022-12-14 13:30:36,253 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 48 treesize of output 36 [2022-12-14 13:30:36,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:36,263 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 36 treesize of output 37 [2022-12-14 13:30:36,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:36,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:36,303 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:30:36,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 13:30:36,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:36,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:36,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:36,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:36,357 INFO L321 Elim1Store]: treesize reduction 144, result has 7.7 percent of original size [2022-12-14 13:30:36,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 133 [2022-12-14 13:30:36,380 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 48 treesize of output 36 [2022-12-14 13:30:36,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:36,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2022-12-14 13:30:36,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:36,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:36,418 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:30:36,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 13:30:36,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:36,472 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:30:36,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '976#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 13:30:36,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:30:36,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:30:36,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-12-14 13:30:36,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043660241] [2022-12-14 13:30:36,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:30:36,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 13:30:36,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:30:36,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 13:30:36,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:30:36,770 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 13:30:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:30:36,849 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-12-14 13:30:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:30:36,850 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 19 [2022-12-14 13:30:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:30:36,850 INFO L225 Difference]: With dead ends: 70 [2022-12-14 13:30:36,850 INFO L226 Difference]: Without dead ends: 52 [2022-12-14 13:30:36,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-12-14 13:30:36,851 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:30:36,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 28 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:30:36,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-14 13:30:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2022-12-14 13:30:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2022-12-14 13:30:36,863 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 19 [2022-12-14 13:30:36,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:36,863 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-12-14 13:30:36,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 13:30:36,863 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2022-12-14 13:30:36,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 13:30:36,864 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:36,864 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:30:36,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 13:30:37,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:37,065 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:30:37,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:37,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1569018936, now seen corresponding path program 4 times [2022-12-14 13:30:37,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:37,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961828844] [2022-12-14 13:30:37,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:37,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:37,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:30:37,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113464657] [2022-12-14 13:30:37,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:30:37,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:37,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:37,128 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:30:37,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:30:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:37,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-14 13:30:37,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:30:37,201 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 44 treesize of output 42 [2022-12-14 13:30:37,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:37,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:37,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 13:30:37,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:37,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 13:30:37,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:30:37,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:37,338 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:30:37,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-12-14 13:30:37,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:37,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:37,365 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:30:37,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 44 [2022-12-14 13:30:37,458 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:30:37,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2022-12-14 13:30:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:30:37,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:30:37,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 13:30:37,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 13:30:37,677 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (let ((.cse6 (= |c_ULTIMATE.start_main_~i~0#1| 0)) (.cse1 (+ .cse7 8 |c_ULTIMATE.start_main_~c~0#1.offset|)) (.cse2 (+ .cse7 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse3 (+ .cse7 |c_ULTIMATE.start_main_~c~0#1.offset|)) (.cse4 (+ .cse7 16 |c_ULTIMATE.start_main_~c~0#1.offset|)) (.cse5 (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|))) (and (or (forall ((v_ArrVal_403 Int)) (= (select (store (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset| 0))) (store .cse0 .cse1 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base| .cse0) |c_ULTIMATE.start_main_~b~0#1.base|) .cse2) (select .cse0 .cse3)))) .cse4 v_ArrVal_403) .cse5) 1)) (not .cse6)) (or .cse6 (and (forall ((v_ArrVal_396 (Array Int Int)) (v_ArrVal_403 Int)) (= (select (store (store v_ArrVal_396 .cse1 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base| v_ArrVal_396) |c_ULTIMATE.start_main_~b~0#1.base|) .cse2) (select v_ArrVal_396 .cse3))) .cse4 v_ArrVal_403) .cse5) 1)) (not (= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 0))))))) is different from false [2022-12-14 13:30:37,797 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:37,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 33 [2022-12-14 13:30:37,909 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:37,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2022-12-14 13:30:37,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:37,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2022-12-14 13:30:37,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:37,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 44 [2022-12-14 13:30:37,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:37,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 505 treesize of output 501 [2022-12-14 13:30:37,982 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 287 treesize of output 281 [2022-12-14 13:30:38,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 13:30:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2022-12-14 13:30:38,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:38,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961828844] [2022-12-14 13:30:38,068 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:30:38,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113464657] [2022-12-14 13:30:38,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113464657] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:30:38,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [889071654] [2022-12-14 13:30:38,070 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:30:38,070 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:30:38,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:30:38,071 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:30:38,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:30:38,213 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-12-14 13:30:38,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-12-14 13:30:38,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-12-14 13:30:38,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:30:38,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:38,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:38,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:38,370 INFO L321 Elim1Store]: treesize reduction 145, result has 12.1 percent of original size [2022-12-14 13:30:38,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 464 treesize of output 486 [2022-12-14 13:30:38,449 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-12-14 13:30:38,449 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 469 treesize of output 454 [2022-12-14 13:30:38,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2022-12-14 13:30:38,578 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 11 treesize of output 7 [2022-12-14 13:30:38,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-12-14 13:30:38,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:38,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:38,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:38,633 INFO L321 Elim1Store]: treesize reduction 144, result has 7.7 percent of original size [2022-12-14 13:30:38,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 133 [2022-12-14 13:30:38,648 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 69 treesize of output 55 [2022-12-14 13:30:38,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:38,655 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 55 treesize of output 49 [2022-12-14 13:30:38,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:38,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:38,681 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:30:38,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 13:30:38,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:38,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:38,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:38,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:38,744 INFO L321 Elim1Store]: treesize reduction 144, result has 7.7 percent of original size [2022-12-14 13:30:38,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 133 [2022-12-14 13:30:38,765 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 25 [2022-12-14 13:30:38,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:38,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-12-14 13:30:38,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:38,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:38,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:38,812 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:30:38,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 13:30:38,857 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:30:39,175 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1306#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 13:30:39,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:30:39,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:30:39,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2022-12-14 13:30:39,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710098704] [2022-12-14 13:30:39,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:30:39,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 13:30:39,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:30:39,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 13:30:39,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=806, Unknown=1, NotChecked=58, Total=992 [2022-12-14 13:30:39,178 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 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 13:30:40,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:30:40,483 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2022-12-14 13:30:40,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 13:30:40,483 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 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 13:30:40,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:30:40,483 INFO L225 Difference]: With dead ends: 66 [2022-12-14 13:30:40,483 INFO L226 Difference]: Without dead ends: 56 [2022-12-14 13:30:40,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=355, Invalid=1628, Unknown=1, NotChecked=86, Total=2070 [2022-12-14 13:30:40,484 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 111 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:30:40,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 35 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 245 Invalid, 0 Unknown, 28 Unchecked, 0.4s Time] [2022-12-14 13:30:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-14 13:30:40,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 24. [2022-12-14 13:30:40,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-12-14 13:30:40,490 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20 [2022-12-14 13:30:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:40,490 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-12-14 13:30:40,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 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 13:30:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-12-14 13:30:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 13:30:40,491 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:40,491 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:30:40,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 13:30:40,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 13:30:40,692 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:30:40,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:40,692 INFO L85 PathProgramCache]: Analyzing trace with hash -508896993, now seen corresponding path program 5 times [2022-12-14 13:30:40,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:40,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040227671] [2022-12-14 13:30:40,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:40,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:40,711 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:30:40,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367751972] [2022-12-14 13:30:40,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:30:40,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:40,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:40,712 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:30:40,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:30:40,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:30:40,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-12-14 13:30:40,964 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 13:30:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 13:30:41,042 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 13:30:41,042 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 13:30:41,043 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 13:30:41,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 13:30:41,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 13:30:41,250 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1] [2022-12-14 13:30:41,256 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 13:30:41,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 01:30:41 BoogieIcfgContainer [2022-12-14 13:30:41,277 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 13:30:41,277 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 13:30:41,277 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 13:30:41,278 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 13:30:41,278 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:30:25" (3/4) ... [2022-12-14 13:30:41,279 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 13:30:41,317 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fabe215b-b4cc-46a9-b71b-8008b5046a0f/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 13:30:41,317 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 13:30:41,317 INFO L158 Benchmark]: Toolchain (without parser) took 16659.48ms. Allocated memory was 184.5MB in the beginning and 222.3MB in the end (delta: 37.7MB). Free memory was 121.6MB in the beginning and 188.2MB in the end (delta: -66.6MB). Peak memory consumption was 101.2MB. Max. memory is 16.1GB. [2022-12-14 13:30:41,317 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 107.0MB. Free memory is still 77.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 13:30:41,318 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.15ms. Allocated memory is still 184.5MB. Free memory was 121.4MB in the beginning and 110.6MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 13:30:41,318 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.04ms. Allocated memory is still 184.5MB. Free memory was 110.4MB in the beginning and 108.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 13:30:41,318 INFO L158 Benchmark]: Boogie Preprocessor took 18.62ms. Allocated memory is still 184.5MB. Free memory was 108.8MB in the beginning and 107.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 13:30:41,318 INFO L158 Benchmark]: RCFGBuilder took 342.94ms. Allocated memory is still 184.5MB. Free memory was 107.5MB in the beginning and 147.3MB in the end (delta: -39.8MB). Peak memory consumption was 15.6MB. Max. memory is 16.1GB. [2022-12-14 13:30:41,318 INFO L158 Benchmark]: TraceAbstraction took 16043.01ms. Allocated memory was 184.5MB in the beginning and 222.3MB in the end (delta: 37.7MB). Free memory was 146.6MB in the beginning and 63.4MB in the end (delta: 83.2MB). Peak memory consumption was 123.4MB. Max. memory is 16.1GB. [2022-12-14 13:30:41,318 INFO L158 Benchmark]: Witness Printer took 39.59ms. Allocated memory is still 222.3MB. Free memory was 63.4MB in the beginning and 188.2MB in the end (delta: -124.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 13:30:41,319 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 107.0MB. Free memory is still 77.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 184.15ms. Allocated memory is still 184.5MB. Free memory was 121.4MB in the beginning and 110.6MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.04ms. Allocated memory is still 184.5MB. Free memory was 110.4MB in the beginning and 108.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.62ms. Allocated memory is still 184.5MB. Free memory was 108.8MB in the beginning and 107.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 342.94ms. Allocated memory is still 184.5MB. Free memory was 107.5MB in the beginning and 147.3MB in the end (delta: -39.8MB). Peak memory consumption was 15.6MB. Max. memory is 16.1GB. * TraceAbstraction took 16043.01ms. Allocated memory was 184.5MB in the beginning and 222.3MB in the end (delta: 37.7MB). Free memory was 146.6MB in the beginning and 63.4MB in the end (delta: 83.2MB). Peak memory consumption was 123.4MB. Max. memory is 16.1GB. * Witness Printer took 39.59ms. Allocated memory is still 222.3MB. Free memory was 63.4MB in the beginning and 188.2MB in the end (delta: -124.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] i=0 VAL [a={5:0}, b={4:0}, c={6:0}, i=0, N=3] [L32] COND TRUE i