./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_mul_init.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_mul_init.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba --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 09dc663f7f76eee13b6af61297831e3fbddcb16c16389bf8d94f2d27048733d0 --- 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-b5237d8 [2022-11-22 01:19:40,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:19:40,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:19:40,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:19:40,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:19:40,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:19:40,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:19:40,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:19:40,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:19:40,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:19:40,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:19:40,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:19:40,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:19:40,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:19:40,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:19:40,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:19:40,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:19:40,757 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:19:40,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:19:40,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:19:40,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:19:40,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:19:40,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:19:40,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:19:40,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:19:40,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:19:40,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:19:40,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:19:40,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:19:40,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:19:40,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:19:40,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:19:40,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:19:40,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:19:40,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:19:40,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:19:40,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:19:40,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:19:40,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:19:40,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:19:40,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:19:40,796 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:19:40,835 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:19:40,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:19:40,836 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:19:40,836 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:19:40,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:19:40,845 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:19:40,847 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:19:40,847 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:19:40,847 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:19:40,847 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:19:40,849 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:19:40,849 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:19:40,849 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:19:40,849 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:19:40,850 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:19:40,850 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:19:40,850 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:19:40,850 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:19:40,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:19:40,852 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:19:40,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:19:40,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:19:40,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:19:40,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:19:40,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:19:40,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:19:40,854 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:19:40,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:19:40,854 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:19:40,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:19:40,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:19:40,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:19:40,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:19:40,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:19:40,856 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:19:40,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:19:40,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:19:40,857 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:19:40,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:19:40,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:19:40,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:19:40,858 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_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09dc663f7f76eee13b6af61297831e3fbddcb16c16389bf8d94f2d27048733d0 [2022-11-22 01:19:41,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:19:41,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:19:41,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:19:41,220 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:19:41,220 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:19:41,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-industry-pattern/array_mul_init.i [2022-11-22 01:19:44,239 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:19:44,436 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:19:44,436 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/sv-benchmarks/c/array-industry-pattern/array_mul_init.i [2022-11-22 01:19:44,443 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/data/25750133d/28b9463d130f49e99b0d8bd78e3b2637/FLAGb136fbbe8 [2022-11-22 01:19:44,458 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/data/25750133d/28b9463d130f49e99b0d8bd78e3b2637 [2022-11-22 01:19:44,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:19:44,462 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:19:44,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:19:44,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:19:44,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:19:44,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:19:44" (1/1) ... [2022-11-22 01:19:44,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a4fb72c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:19:44, skipping insertion in model container [2022-11-22 01:19:44,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:19:44" (1/1) ... [2022-11-22 01:19:44,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:19:44,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:19:44,640 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_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/sv-benchmarks/c/array-industry-pattern/array_mul_init.i[807,820] [2022-11-22 01:19:44,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:19:44,680 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:19:44,695 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_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/sv-benchmarks/c/array-industry-pattern/array_mul_init.i[807,820] [2022-11-22 01:19:44,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:19:44,736 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:19:44,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:19:44 WrapperNode [2022-11-22 01:19:44,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:19:44,738 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:19:44,738 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:19:44,738 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:19:44,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:19:44" (1/1) ... [2022-11-22 01:19:44,767 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:19:44" (1/1) ... [2022-11-22 01:19:44,796 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2022-11-22 01:19:44,797 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:19:44,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:19:44,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:19:44,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:19:44,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:19:44" (1/1) ... [2022-11-22 01:19:44,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:19:44" (1/1) ... [2022-11-22 01:19:44,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:19:44" (1/1) ... [2022-11-22 01:19:44,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:19:44" (1/1) ... [2022-11-22 01:19:44,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:19:44" (1/1) ... [2022-11-22 01:19:44,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:19:44" (1/1) ... [2022-11-22 01:19:44,841 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:19:44" (1/1) ... [2022-11-22 01:19:44,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:19:44" (1/1) ... [2022-11-22 01:19:44,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:19:44,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:19:44,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:19:44,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:19:44,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:19:44" (1/1) ... [2022-11-22 01:19:44,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:19:44,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:19:44,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:19:44,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:19:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:19:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:19:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:19:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:19:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:19:44,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:19:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:19:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:19:45,028 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:19:45,031 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:19:45,287 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:19:45,348 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:19:45,348 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-22 01:19:45,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:19:45 BoogieIcfgContainer [2022-11-22 01:19:45,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:19:45,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:19:45,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:19:45,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:19:45,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:19:44" (1/3) ... [2022-11-22 01:19:45,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a310780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:19:45, skipping insertion in model container [2022-11-22 01:19:45,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:19:44" (2/3) ... [2022-11-22 01:19:45,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a310780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:19:45, skipping insertion in model container [2022-11-22 01:19:45,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:19:45" (3/3) ... [2022-11-22 01:19:45,360 INFO L112 eAbstractionObserver]: Analyzing ICFG array_mul_init.i [2022-11-22 01:19:45,380 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:19:45,380 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:19:45,454 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:19:45,462 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;@2cbae79b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:19:45,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:19:45,467 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:19:45,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:19:45,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:19:45,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 01:19:45,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:19:45,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:19:45,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1244850581, now seen corresponding path program 1 times [2022-11-22 01:19:45,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:19:45,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991691003] [2022-11-22 01:19:45,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:19:45,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:19:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:19:45,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:19:45,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991691003] [2022-11-22 01:19:45,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-22 01:19:45,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588265270] [2022-11-22 01:19:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:19:45,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:19:45,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:19:45,689 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:19:45,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:19:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:19:45,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:19:45,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:19:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:19:45,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:19:45,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588265270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:19:45,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:19:45,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:19:45,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615653868] [2022-11-22 01:19:45,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:19:45,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:19:45,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:19:45,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:19:45,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:19:45,909 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:19:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:19:45,957 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2022-11-22 01:19:45,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:19:45,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-22 01:19:45,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:19:45,970 INFO L225 Difference]: With dead ends: 23 [2022-11-22 01:19:45,970 INFO L226 Difference]: Without dead ends: 15 [2022-11-22 01:19:45,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:19:45,977 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:19:45,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:19:45,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-22 01:19:46,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2022-11-22 01:19:46,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:19:46,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-22 01:19:46,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-11-22 01:19:46,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:19:46,008 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-22 01:19:46,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:19:46,008 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-22 01:19:46,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:19:46,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:19:46,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:19:46,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 01:19:46,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-22 01:19:46,214 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:19:46,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:19:46,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1704292246, now seen corresponding path program 1 times [2022-11-22 01:19:46,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:19:46,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518185464] [2022-11-22 01:19:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:19:46,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:19:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:19:46,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:19:46,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518185464] [2022-11-22 01:19:46,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-22 01:19:46,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532490760] [2022-11-22 01:19:46,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:19:46,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:19:46,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:19:46,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:19:46,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:19:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:19:46,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:19:46,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:19:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:19:46,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:19:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:19:46,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532490760] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:19:46,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1056371901] [2022-11-22 01:19:46,588 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:19:46,589 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:19:46,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:19:46,598 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:19:46,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:19:46,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:46,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:46,720 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-22 01:19:46,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-22 01:19:46,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:46,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:46,823 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-22 01:19:46,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-22 01:19:46,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:46,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:46,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-22 01:19:47,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:47,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:47,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:47,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:47,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:47,203 INFO L321 Elim1Store]: treesize reduction 249, result has 16.2 percent of original size [2022-11-22 01:19:47,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 272 treesize of output 268 [2022-11-22 01:19:47,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:47,532 INFO L321 Elim1Store]: treesize reduction 24, result has 36.8 percent of original size [2022-11-22 01:19:47,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 29 [2022-11-22 01:19:47,610 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-22 01:19:47,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2022-11-22 01:19:47,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:47,708 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 01:19:47,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-22 01:19:47,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:47,794 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 01:19:47,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-22 01:19:47,913 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:19:48,189 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '124#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= (* |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= (ite |ULTIMATE.start_main_#t~short11#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:19:48,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:19:48,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:19:48,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-22 01:19:48,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621643980] [2022-11-22 01:19:48,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:19:48,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:19:48,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:19:48,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:19:48,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:19:48,193 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:19:48,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:19:48,274 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-11-22 01:19:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:19:48,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-22 01:19:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:19:48,277 INFO L225 Difference]: With dead ends: 39 [2022-11-22 01:19:48,277 INFO L226 Difference]: Without dead ends: 32 [2022-11-22 01:19:48,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:19:48,282 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:19:48,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:19:48,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-22 01:19:48,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 16. [2022-11-22 01:19:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2022-11-22 01:19:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-22 01:19:48,294 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-11-22 01:19:48,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:19:48,295 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-22 01:19:48,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:19:48,295 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-22 01:19:48,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:19:48,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:19:48,296 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 01:19:48,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:19:48,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:19:48,503 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:19:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:19:48,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2029215189, now seen corresponding path program 2 times [2022-11-22 01:19:48,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:19:48,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617279634] [2022-11-22 01:19:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:19:48,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:19:48,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:19:48,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107585677] [2022-11-22 01:19:48,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:19:48,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:19:48,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:19:48,552 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:19:48,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:19:48,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:19:48,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:19:48,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:19:48,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:19:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:19:48,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:19:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:19:48,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:19:48,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617279634] [2022-11-22 01:19:48,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:19:48,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107585677] [2022-11-22 01:19:48,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107585677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:19:48,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1100077375] [2022-11-22 01:19:48,835 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:19:48,835 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:19:48,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:19:48,836 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:19:48,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:19:48,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:48,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:48,888 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-22 01:19:48,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-22 01:19:48,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:48,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:48,954 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-22 01:19:48,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-22 01:19:48,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:49,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:49,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-11-22 01:19:49,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:49,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:49,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:49,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:49,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:49,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:49,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:49,144 INFO L321 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2022-11-22 01:19:49,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 286 treesize of output 270 [2022-11-22 01:19:49,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:49,227 INFO L321 Elim1Store]: treesize reduction 24, result has 36.8 percent of original size [2022-11-22 01:19:49,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 29 [2022-11-22 01:19:49,282 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-22 01:19:49,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2022-11-22 01:19:49,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:49,353 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 01:19:49,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-22 01:19:49,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:49,422 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 01:19:49,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-22 01:19:49,489 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:19:49,792 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '302#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= (* |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= (ite |ULTIMATE.start_main_#t~short11#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:19:49,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:19:49,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:19:49,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-22 01:19:49,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623628566] [2022-11-22 01:19:49,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:19:49,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 01:19:49,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:19:49,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 01:19:49,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:19:49,794 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) 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) [2022-11-22 01:19:49,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:19:49,948 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2022-11-22 01:19:49,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:19:49,949 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) 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) Word has length 14 [2022-11-22 01:19:49,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:19:49,950 INFO L225 Difference]: With dead ends: 84 [2022-11-22 01:19:49,950 INFO L226 Difference]: Without dead ends: 74 [2022-11-22 01:19:49,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:19:49,951 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 84 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:19:49,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 30 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:19:49,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-22 01:19:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 28. [2022-11-22 01:19:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:19:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-11-22 01:19:49,959 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2022-11-22 01:19:49,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:19:49,959 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-11-22 01:19:49,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) 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) [2022-11-22 01:19:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-11-22 01:19:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-22 01:19:49,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:19:49,960 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2022-11-22 01:19:49,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:19:50,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:19:50,161 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:19:50,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:19:50,162 INFO L85 PathProgramCache]: Analyzing trace with hash -768544821, now seen corresponding path program 3 times [2022-11-22 01:19:50,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:19:50,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950152501] [2022-11-22 01:19:50,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:19:50,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:19:50,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:19:50,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892086292] [2022-11-22 01:19:50,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:19:50,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:19:50,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:19:50,227 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:19:50,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:19:50,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:19:50,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:19:50,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 01:19:50,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:19:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-22 01:19:50,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:19:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-22 01:19:50,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:19:50,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950152501] [2022-11-22 01:19:50,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:19:50,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892086292] [2022-11-22 01:19:50,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892086292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:19:50,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1886958559] [2022-11-22 01:19:50,772 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:19:50,772 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:19:50,772 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:19:50,773 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:19:50,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:19:50,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:50,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:50,831 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-22 01:19:50,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-22 01:19:50,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:50,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:50,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-22 01:19:50,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:50,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:50,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-11-22 01:19:50,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:50,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:50,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:50,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:50,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:50,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:50,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:50,996 INFO L321 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2022-11-22 01:19:50,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 286 treesize of output 270 [2022-11-22 01:19:51,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:51,087 INFO L321 Elim1Store]: treesize reduction 24, result has 36.8 percent of original size [2022-11-22 01:19:51,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 29 [2022-11-22 01:19:51,132 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-22 01:19:51,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2022-11-22 01:19:51,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:51,181 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 01:19:51,181 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 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-22 01:19:51,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:51,242 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 01:19:51,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-22 01:19:51,306 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:19:51,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '654#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= (* |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= (ite |ULTIMATE.start_main_#t~short11#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:19:51,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:19:51,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:19:51,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-22 01:19:51,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704965341] [2022-11-22 01:19:51,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:19:51,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 01:19:51,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:19:51,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 01:19:51,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=400, Unknown=0, NotChecked=0, Total=756 [2022-11-22 01:19:51,597 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:19:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:19:52,001 INFO L93 Difference]: Finished difference Result 174 states and 201 transitions. [2022-11-22 01:19:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 01:19:52,002 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 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 26 [2022-11-22 01:19:52,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:19:52,003 INFO L225 Difference]: With dead ends: 174 [2022-11-22 01:19:52,003 INFO L226 Difference]: Without dead ends: 158 [2022-11-22 01:19:52,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=356, Invalid=400, Unknown=0, NotChecked=0, Total=756 [2022-11-22 01:19:52,015 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 228 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:19:52,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 66 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:19:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-22 01:19:52,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 52. [2022-11-22 01:19:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:19:52,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-11-22 01:19:52,026 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 26 [2022-11-22 01:19:52,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:19:52,026 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-11-22 01:19:52,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:19:52,026 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-11-22 01:19:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 01:19:52,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:19:52,028 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2022-11-22 01:19:52,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:19:52,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:19:52,240 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:19:52,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:19:52,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1049894133, now seen corresponding path program 4 times [2022-11-22 01:19:52,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:19:52,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453425452] [2022-11-22 01:19:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:19:52,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:19:52,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:19:52,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48126794] [2022-11-22 01:19:52,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:19:52,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:19:52,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:19:52,399 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:19:52,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:19:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:19:52,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:19:52,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:19:52,998 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-22 01:19:52,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:19:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-22 01:19:53,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:19:53,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453425452] [2022-11-22 01:19:53,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:19:53,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48126794] [2022-11-22 01:19:53,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48126794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:19:53,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443585346] [2022-11-22 01:19:53,831 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:19:53,831 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:19:53,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:19:53,862 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:19:53,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:19:53,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:53,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:53,910 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-22 01:19:53,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-22 01:19:53,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:53,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:53,971 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-22 01:19:53,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-22 01:19:53,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:53,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:53,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-11-22 01:19:54,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:54,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:54,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:54,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:54,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:54,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:54,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:54,105 INFO L321 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2022-11-22 01:19:54,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 286 treesize of output 270 [2022-11-22 01:19:54,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:54,174 INFO L321 Elim1Store]: treesize reduction 24, result has 36.8 percent of original size [2022-11-22 01:19:54,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 29 [2022-11-22 01:19:54,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:54,218 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 01:19:54,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-22 01:19:54,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:54,263 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 01:19:54,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-22 01:19:54,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:54,311 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 01:19:54,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-22 01:19:54,378 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:19:54,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1354#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= (* |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= (ite |ULTIMATE.start_main_#t~short11#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:19:54,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:19:54,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:19:54,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2022-11-22 01:19:54,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649164860] [2022-11-22 01:19:54,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:19:54,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-22 01:19:54,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:19:54,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-22 01:19:54,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1372, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 01:19:54,671 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:19:55,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:19:55,520 INFO L93 Difference]: Finished difference Result 354 states and 405 transitions. [2022-11-22 01:19:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-22 01:19:55,521 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-22 01:19:55,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:19:55,526 INFO L225 Difference]: With dead ends: 354 [2022-11-22 01:19:55,526 INFO L226 Difference]: Without dead ends: 326 [2022-11-22 01:19:55,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1280, Invalid=1372, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 01:19:55,528 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 684 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:19:55,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 138 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:19:55,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-22 01:19:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 100. [2022-11-22 01:19:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:19:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-11-22 01:19:55,542 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 50 [2022-11-22 01:19:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:19:55,543 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-11-22 01:19:55,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:19:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-11-22 01:19:55,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-22 01:19:55,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:19:55,545 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2022-11-22 01:19:55,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:19:55,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:19:55,752 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:19:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:19:55,753 INFO L85 PathProgramCache]: Analyzing trace with hash -129816181, now seen corresponding path program 5 times [2022-11-22 01:19:55,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:19:55,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340860907] [2022-11-22 01:19:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:19:55,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:19:55,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:19:55,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978448346] [2022-11-22 01:19:55,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:19:55,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:19:55,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:19:55,975 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:19:56,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcd1f7c-ea6b-4987-9cfd-2059e42beebf/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process