./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta --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 14bc2dbf7c29b1d0f6a0a1f7aa323adbc9855e56ce7f667c86a31ecee97dcbe0 --- 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-dbf71c6-m [2022-10-17 17:21:57,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:21:57,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:21:57,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:21:57,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:21:57,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:21:57,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:21:57,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:21:57,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:21:57,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:21:57,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:21:57,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:21:57,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:21:57,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:21:57,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:21:57,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:21:57,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:21:57,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:21:57,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:21:57,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:21:57,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:21:57,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:21:57,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:21:57,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:21:57,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:21:57,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:21:57,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:21:57,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:21:57,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:21:57,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:21:57,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:21:57,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:21:57,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:21:57,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:21:57,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:21:57,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:21:57,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:21:57,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:21:57,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:21:57,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:21:57,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:21:57,857 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:21:57,904 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:21:57,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:21:57,905 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:21:57,905 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:21:57,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:21:57,907 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:21:57,907 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:21:57,907 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:21:57,908 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:21:57,908 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:21:57,909 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:21:57,909 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:21:57,910 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:21:57,910 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:21:57,910 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:21:57,910 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:21:57,911 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:21:57,911 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:21:57,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:21:57,912 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:21:57,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:21:57,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:21:57,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:21:57,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:21:57,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:21:57,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:21:57,914 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:21:57,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:21:57,914 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:21:57,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:21:57,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:21:57,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:21:57,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:21:57,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:21:57,916 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:21:57,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:21:57,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:21:57,917 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:21:57,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:21:57,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:21:57,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:21:57,919 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_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14bc2dbf7c29b1d0f6a0a1f7aa323adbc9855e56ce7f667c86a31ecee97dcbe0 [2022-10-17 17:21:58,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:21:58,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:21:58,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:21:58,344 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:21:58,345 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:21:58,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/array-fpi/eqn1.c [2022-10-17 17:21:58,430 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/data/fbe12d337/ead4030e7abd4f88a0bd8635bc05b1cf/FLAGd373e1775 [2022-10-17 17:21:58,951 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:21:58,951 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/sv-benchmarks/c/array-fpi/eqn1.c [2022-10-17 17:21:58,962 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/data/fbe12d337/ead4030e7abd4f88a0bd8635bc05b1cf/FLAGd373e1775 [2022-10-17 17:21:59,267 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/data/fbe12d337/ead4030e7abd4f88a0bd8635bc05b1cf [2022-10-17 17:21:59,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:21:59,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:21:59,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:21:59,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:21:59,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:21:59,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:21:59" (1/1) ... [2022-10-17 17:21:59,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14eb298e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:59, skipping insertion in model container [2022-10-17 17:21:59,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:21:59" (1/1) ... [2022-10-17 17:21:59,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:21:59,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:21:59,524 WARN L230 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_0db99ad7-3645-4919-8706-23a25043065d/sv-benchmarks/c/array-fpi/eqn1.c[587,600] [2022-10-17 17:21:59,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:21:59,572 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:21:59,592 WARN L230 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_0db99ad7-3645-4919-8706-23a25043065d/sv-benchmarks/c/array-fpi/eqn1.c[587,600] [2022-10-17 17:21:59,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:21:59,630 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:21:59,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:59 WrapperNode [2022-10-17 17:21:59,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:21:59,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:21:59,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:21:59,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:21:59,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:59" (1/1) ... [2022-10-17 17:21:59,659 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:59" (1/1) ... [2022-10-17 17:21:59,692 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-10-17 17:21:59,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:21:59,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:21:59,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:21:59,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:21:59,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:59" (1/1) ... [2022-10-17 17:21:59,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:59" (1/1) ... [2022-10-17 17:21:59,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:59" (1/1) ... [2022-10-17 17:21:59,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:59" (1/1) ... [2022-10-17 17:21:59,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:59" (1/1) ... [2022-10-17 17:21:59,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:59" (1/1) ... [2022-10-17 17:21:59,741 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:59" (1/1) ... [2022-10-17 17:21:59,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:59" (1/1) ... [2022-10-17 17:21:59,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:21:59,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:21:59,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:21:59,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:21:59,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:59" (1/1) ... [2022-10-17 17:21:59,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:21:59,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:59,789 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:21:59,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:21:59,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:21:59,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:21:59,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:21:59,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:21:59,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:21:59,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:21:59,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:21:59,948 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:21:59,950 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:22:00,150 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:22:00,200 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:22:00,200 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 17:22:00,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:22:00 BoogieIcfgContainer [2022-10-17 17:22:00,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:22:00,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:22:00,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:22:00,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:22:00,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:21:59" (1/3) ... [2022-10-17 17:22:00,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20350238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:22:00, skipping insertion in model container [2022-10-17 17:22:00,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:59" (2/3) ... [2022-10-17 17:22:00,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20350238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:22:00, skipping insertion in model container [2022-10-17 17:22:00,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:22:00" (3/3) ... [2022-10-17 17:22:00,214 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn1.c [2022-10-17 17:22:00,234 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:22:00,234 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:22:00,332 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:22:00,340 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;@1fe7923d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:22:00,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:22:00,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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) [2022-10-17 17:22:00,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 17:22:00,351 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:00,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:00,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:00,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:00,358 INFO L85 PathProgramCache]: Analyzing trace with hash -794748304, now seen corresponding path program 1 times [2022-10-17 17:22:00,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:00,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273246572] [2022-10-17 17:22:00,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:00,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:00,506 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:22:00,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955981621] [2022-10-17 17:22:00,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:00,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:00,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:00,509 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:00,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:22:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:00,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 17:22:00,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:00,863 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-10-17 17:22:00,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-10-17 17:22:00,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:22:00,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:22:01,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:22:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:01,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:01,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:01,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273246572] [2022-10-17 17:22:01,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:22:01,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955981621] [2022-10-17 17:22:01,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955981621] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:01,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:01,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:22:01,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118300614] [2022-10-17 17:22:01,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:01,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:22:01,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:01,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:22:01,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:22:01,240 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:01,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:01,373 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-10-17 17:22:01,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:22:01,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-17 17:22:01,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:01,394 INFO L225 Difference]: With dead ends: 35 [2022-10-17 17:22:01,395 INFO L226 Difference]: Without dead ends: 20 [2022-10-17 17:22:01,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:22:01,401 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:01,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:22:01,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-10-17 17:22:01,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 13. [2022-10-17 17:22:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 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) [2022-10-17 17:22:01,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2022-10-17 17:22:01,430 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2022-10-17 17:22:01,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:01,431 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2022-10-17 17:22:01,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:01,431 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2022-10-17 17:22:01,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:22:01,432 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:01,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:01,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:01,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-17 17:22:01,652 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:01,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:01,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1127926275, now seen corresponding path program 1 times [2022-10-17 17:22:01,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:01,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594461023] [2022-10-17 17:22:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:01,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:01,715 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:22:01,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525342456] [2022-10-17 17:22:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:01,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:01,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:01,717 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:01,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:22:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:01,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:22:01,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:01,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:01,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:01,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594461023] [2022-10-17 17:22:01,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:22:01,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525342456] [2022-10-17 17:22:01,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525342456] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:01,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:01,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:22:01,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036928328] [2022-10-17 17:22:01,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:01,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:22:01,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:01,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:22:01,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:01,852 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:01,924 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2022-10-17 17:22:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:22:01,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-17 17:22:01,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:01,926 INFO L225 Difference]: With dead ends: 25 [2022-10-17 17:22:01,926 INFO L226 Difference]: Without dead ends: 19 [2022-10-17 17:22:01,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:22:01,933 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:01,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:22:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-10-17 17:22:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2022-10-17 17:22:01,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-10-17 17:22:01,948 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2022-10-17 17:22:01,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:01,948 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-10-17 17:22:01,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-10-17 17:22:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:22:01,950 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:01,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:01,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:02,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:02,176 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:02,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:02,176 INFO L85 PathProgramCache]: Analyzing trace with hash 849022933, now seen corresponding path program 1 times [2022-10-17 17:22:02,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:02,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417610360] [2022-10-17 17:22:02,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:02,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:02,243 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:22:02,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096323781] [2022-10-17 17:22:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:02,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:02,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:02,246 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:02,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:22:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:02,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:22:02,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:02,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:22:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:02,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:02,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417610360] [2022-10-17 17:22:02,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:22:02,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096323781] [2022-10-17 17:22:02,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096323781] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:22:02,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [505009016] [2022-10-17 17:22:02,433 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-10-17 17:22:02,433 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:22:02,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:22:02,448 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:22:02,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:22:02,675 INFO L356 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2022-10-17 17:22:02,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2022-10-17 17:22:02,854 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-10-17 17:22:02,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-10-17 17:22:02,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 30 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 105 [2022-10-17 17:22:03,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 31 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 122 [2022-10-17 17:22:03,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:03,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:03,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,501 INFO L356 Elim1Store]: treesize reduction 241, result has 12.4 percent of original size [2022-10-17 17:22:03,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 42 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 43 case distinctions, treesize of input 514 treesize of output 526 [2022-10-17 17:22:03,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:03,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-10-17 17:22:03,849 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:22:04,216 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '238#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= ~N~0 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-10-17 17:22:04,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:22:04,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:22:04,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-10-17 17:22:04,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898861619] [2022-10-17 17:22:04,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:22:04,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:22:04,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:04,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:22:04,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:22:04,219 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-10-17 17:22:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:04,329 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-10-17 17:22:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:22:04,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 [2022-10-17 17:22:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:04,330 INFO L225 Difference]: With dead ends: 29 [2022-10-17 17:22:04,331 INFO L226 Difference]: Without dead ends: 24 [2022-10-17 17:22:04,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:22:04,332 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:04,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:22:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-10-17 17:22:04,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2022-10-17 17:22:04,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2022-10-17 17:22:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-10-17 17:22:04,337 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2022-10-17 17:22:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:04,338 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-10-17 17:22:04,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-10-17 17:22:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-10-17 17:22:04,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 17:22:04,338 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:04,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:04,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:04,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-10-17 17:22:04,567 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:04,568 INFO L85 PathProgramCache]: Analyzing trace with hash 545227070, now seen corresponding path program 1 times [2022-10-17 17:22:04,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:04,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515358860] [2022-10-17 17:22:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:04,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:04,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:22:04,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821090539] [2022-10-17 17:22:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:04,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:04,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:04,610 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:04,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:22:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:04,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2022-10-17 17:22:04,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:04,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-17 17:22:04,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:04,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-10-17 17:22:04,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:22:04,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 17:22:04,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-17 17:22:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:04,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:22:05,078 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_114 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_114) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) is different from false [2022-10-17 17:22:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-10-17 17:22:05,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:05,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515358860] [2022-10-17 17:22:05,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:22:05,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821090539] [2022-10-17 17:22:05,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821090539] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:22:05,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2063646492] [2022-10-17 17:22:05,099 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-10-17 17:22:05,099 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:22:05,100 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:22:05,100 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:22:05,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:22:05,239 INFO L356 Elim1Store]: treesize reduction 66, result has 37.7 percent of original size [2022-10-17 17:22:05,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 123 [2022-10-17 17:22:05,374 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-10-17 17:22:05,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-10-17 17:22:05,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-10-17 17:22:05,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 31 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 166 [2022-10-17 17:22:05,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:05,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:05,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:05,880 INFO L356 Elim1Store]: treesize reduction 308, result has 0.3 percent of original size [2022-10-17 17:22:05,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 43 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 42 case distinctions, treesize of input 552 treesize of output 520 [2022-10-17 17:22:06,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:06,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-10-17 17:22:06,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:06,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:06,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:06,075 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:22:06,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:22:06,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:06,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:06,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:06,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:06,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:06,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:06,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:06,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:06,217 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:22:06,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 210 treesize of output 191 [2022-10-17 17:22:06,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:06,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:06,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:06,276 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:22:06,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:22:06,298 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:22:06,676 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '368#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-10-17 17:22:06,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:22:06,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:22:06,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-10-17 17:22:06,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079146572] [2022-10-17 17:22:06,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:22:06,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 17:22:06,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:06,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 17:22:06,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=149, Unknown=1, NotChecked=24, Total=210 [2022-10-17 17:22:06,679 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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) [2022-10-17 17:22:06,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:06,826 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-10-17 17:22:06,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:22:06,827 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 17:22:06,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:06,828 INFO L225 Difference]: With dead ends: 32 [2022-10-17 17:22:06,828 INFO L226 Difference]: Without dead ends: 30 [2022-10-17 17:22:06,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=221, Unknown=1, NotChecked=30, Total=306 [2022-10-17 17:22:06,830 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:06,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 21 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-10-17 17:22:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-10-17 17:22:06,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 17. [2022-10-17 17:22:06,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-10-17 17:22:06,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2022-10-17 17:22:06,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:06,837 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-10-17 17:22:06,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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) [2022-10-17 17:22:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-10-17 17:22:06,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 17:22:06,838 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:06,838 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:06,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:07,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:07,057 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:07,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:07,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1813092602, now seen corresponding path program 1 times [2022-10-17 17:22:07,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:07,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921132982] [2022-10-17 17:22:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:07,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:07,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:22:07,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171682808] [2022-10-17 17:22:07,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:07,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:07,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:07,078 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:07,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:22:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:07,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 17:22:07,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:07,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:07,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:07,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921132982] [2022-10-17 17:22:07,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:22:07,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171682808] [2022-10-17 17:22:07,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171682808] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:07,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:07,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:22:07,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381112747] [2022-10-17 17:22:07,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:07,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:22:07,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:07,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:22:07,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:22:07,176 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-10-17 17:22:07,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:07,240 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-10-17 17:22:07,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:22:07,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 10 [2022-10-17 17:22:07,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:07,242 INFO L225 Difference]: With dead ends: 31 [2022-10-17 17:22:07,242 INFO L226 Difference]: Without dead ends: 21 [2022-10-17 17:22:07,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:22:07,243 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:07,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:22:07,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-10-17 17:22:07,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2022-10-17 17:22:07,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-10-17 17:22:07,249 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2022-10-17 17:22:07,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:07,249 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-10-17 17:22:07,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-10-17 17:22:07,250 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-10-17 17:22:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 17:22:07,250 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:07,251 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:07,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:07,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:07,471 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:07,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:07,472 INFO L85 PathProgramCache]: Analyzing trace with hash -282510091, now seen corresponding path program 2 times [2022-10-17 17:22:07,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:07,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137962994] [2022-10-17 17:22:07,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:07,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:07,539 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:22:07,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337499747] [2022-10-17 17:22:07,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:22:07,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:07,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:07,542 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:07,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 17:22:07,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 17:22:07,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:22:07,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:22:07,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:07,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:22:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:07,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:07,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137962994] [2022-10-17 17:22:07,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:22:07,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337499747] [2022-10-17 17:22:07,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337499747] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:22:07,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [286452201] [2022-10-17 17:22:07,705 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-10-17 17:22:07,705 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:22:07,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:22:07,707 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:22:07,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:22:07,851 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-10-17 17:22:07,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-10-17 17:22:07,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 30 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 105 [2022-10-17 17:22:07,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-10-17 17:22:07,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:07,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:07,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 31 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 166 [2022-10-17 17:22:08,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:08,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:08,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,274 INFO L356 Elim1Store]: treesize reduction 308, result has 0.3 percent of original size [2022-10-17 17:22:08,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 43 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 42 case distinctions, treesize of input 581 treesize of output 522 [2022-10-17 17:22:08,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-10-17 17:22:08,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,426 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:22:08,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-10-17 17:22:08,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:08,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:08,566 INFO L356 Elim1Store]: treesize reduction 248, result has 12.1 percent of original size [2022-10-17 17:22:08,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 146 treesize of output 182 [2022-10-17 17:22:08,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:08,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:08,635 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:22:08,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:22:08,657 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:22:08,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '620#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-10-17 17:22:08,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:22:08,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:22:08,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-10-17 17:22:08,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644717551] [2022-10-17 17:22:08,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:22:08,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:22:08,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:08,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:22:08,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-10-17 17:22:08,999 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:09,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:09,093 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-10-17 17:22:09,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:22:09,094 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 17:22:09,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:09,095 INFO L225 Difference]: With dead ends: 33 [2022-10-17 17:22:09,095 INFO L226 Difference]: Without dead ends: 27 [2022-10-17 17:22:09,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:22:09,097 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:09,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:22:09,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-10-17 17:22:09,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2022-10-17 17:22:09,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-10-17 17:22:09,102 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2022-10-17 17:22:09,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:09,102 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-10-17 17:22:09,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:09,102 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-10-17 17:22:09,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 17:22:09,103 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:09,103 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:09,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:09,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:09,304 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:09,304 INFO L85 PathProgramCache]: Analyzing trace with hash -338579101, now seen corresponding path program 3 times [2022-10-17 17:22:09,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:09,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036976562] [2022-10-17 17:22:09,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:09,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:09,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:22:09,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094477042] [2022-10-17 17:22:09,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 17:22:09,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:09,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:09,331 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:09,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 17:22:09,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 17:22:09,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:22:09,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:22:09,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:09,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:22:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:09,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:09,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036976562] [2022-10-17 17:22:09,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:22:09,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094477042] [2022-10-17 17:22:09,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094477042] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:22:09,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406484361] [2022-10-17 17:22:09,493 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-10-17 17:22:09,493 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:22:09,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:22:09,494 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:22:09,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:22:09,574 INFO L356 Elim1Store]: treesize reduction 66, result has 37.7 percent of original size [2022-10-17 17:22:09,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 123 [2022-10-17 17:22:09,696 INFO L356 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2022-10-17 17:22:09,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2022-10-17 17:22:09,823 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-10-17 17:22:09,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-10-17 17:22:09,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:09,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:09,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 31 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 166 [2022-10-17 17:22:10,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:10,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:10,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,160 INFO L356 Elim1Store]: treesize reduction 308, result has 0.3 percent of original size [2022-10-17 17:22:10,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 43 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 42 case distinctions, treesize of input 552 treesize of output 520 [2022-10-17 17:22:10,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-10-17 17:22:10,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:10,307 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:22:10,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:22:10,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:10,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:10,381 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:22:10,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 210 treesize of output 191 [2022-10-17 17:22:10,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:10,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:10,454 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:22:10,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:22:10,484 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:22:10,869 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '764#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-10-17 17:22:10,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:22:10,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:22:10,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-10-17 17:22:10,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287696840] [2022-10-17 17:22:10,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:22:10,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:22:10,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:10,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:22:10,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:22:10,871 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:11,018 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-10-17 17:22:11,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 17:22:11,019 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 17:22:11,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:11,020 INFO L225 Difference]: With dead ends: 37 [2022-10-17 17:22:11,020 INFO L226 Difference]: Without dead ends: 32 [2022-10-17 17:22:11,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-10-17 17:22:11,023 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:11,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:22:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-10-17 17:22:11,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 17. [2022-10-17 17:22:11,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:11,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-10-17 17:22:11,036 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2022-10-17 17:22:11,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:11,036 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-10-17 17:22:11,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:11,039 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-10-17 17:22:11,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:22:11,041 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:11,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:11,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:11,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 17:22:11,255 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:11,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:11,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1910697616, now seen corresponding path program 4 times [2022-10-17 17:22:11,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:11,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677115966] [2022-10-17 17:22:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:11,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:11,302 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:22:11,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916408472] [2022-10-17 17:22:11,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-17 17:22:11,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:11,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:11,311 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:11,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 17:22:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:11,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 31 conjunts are in the unsatisfiable core [2022-10-17 17:22:11,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:11,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-17 17:22:11,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:11,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-10-17 17:22:11,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:22:11,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 17:22:11,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 17:22:11,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:11,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-17 17:22:11,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:11,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-17 17:22:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:11,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:22:11,921 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_251 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_251) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) is different from false [2022-10-17 17:22:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-10-17 17:22:11,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:11,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677115966] [2022-10-17 17:22:11,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:22:11,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916408472] [2022-10-17 17:22:11,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916408472] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:22:11,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [577066040] [2022-10-17 17:22:11,941 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-10-17 17:22:11,941 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:22:11,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:22:11,942 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:22:11,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:22:12,049 INFO L356 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2022-10-17 17:22:12,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2022-10-17 17:22:12,131 INFO L356 Elim1Store]: treesize reduction 66, result has 37.7 percent of original size [2022-10-17 17:22:12,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 123 [2022-10-17 17:22:12,258 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-10-17 17:22:12,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-10-17 17:22:12,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:12,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 31 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 166 [2022-10-17 17:22:12,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:12,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:12,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,585 INFO L356 Elim1Store]: treesize reduction 308, result has 0.3 percent of original size [2022-10-17 17:22:12,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 43 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 42 case distinctions, treesize of input 581 treesize of output 522 [2022-10-17 17:22:12,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-10-17 17:22:12,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:12,729 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:22:12,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:22:12,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:12,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:12,815 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:22:12,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 210 treesize of output 191 [2022-10-17 17:22:12,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:12,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:12,865 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:22:12,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:22:12,882 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:22:13,190 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '929#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-10-17 17:22:13,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:22:13,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:22:13,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-10-17 17:22:13,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506478663] [2022-10-17 17:22:13,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:22:13,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 17:22:13,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:13,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 17:22:13,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=248, Unknown=1, NotChecked=32, Total=342 [2022-10-17 17:22:13,193 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:13,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:13,604 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-10-17 17:22:13,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-17 17:22:13,605 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-17 17:22:13,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:13,606 INFO L225 Difference]: With dead ends: 64 [2022-10-17 17:22:13,606 INFO L226 Difference]: Without dead ends: 62 [2022-10-17 17:22:13,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=146, Invalid=613, Unknown=1, NotChecked=52, Total=812 [2022-10-17 17:22:13,607 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:13,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 55 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 101 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-10-17 17:22:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-10-17 17:22:13,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 19. [2022-10-17 17:22:13,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:13,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-10-17 17:22:13,616 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2022-10-17 17:22:13,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:13,616 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-10-17 17:22:13,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:13,617 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-10-17 17:22:13,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 17:22:13,618 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:13,618 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:13,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:13,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:13,831 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:13,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:13,832 INFO L85 PathProgramCache]: Analyzing trace with hash -701556884, now seen corresponding path program 1 times [2022-10-17 17:22:13,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:13,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417395175] [2022-10-17 17:22:13,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:13,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:13,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:22:13,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231820780] [2022-10-17 17:22:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:13,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:13,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:13,855 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:13,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 17:22:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:13,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 38 conjunts are in the unsatisfiable core [2022-10-17 17:22:13,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:13,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-17 17:22:13,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:13,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-10-17 17:22:13,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-10-17 17:22:13,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:22:13,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:22:14,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:14,041 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:22:14,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-10-17 17:22:14,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:14,075 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:22:14,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-10-17 17:22:14,209 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 17:22:14,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 34 [2022-10-17 17:22:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:14,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:22:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:14,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:14,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417395175] [2022-10-17 17:22:14,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:22:14,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231820780] [2022-10-17 17:22:14,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231820780] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:22:14,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [672456367] [2022-10-17 17:22:14,769 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-10-17 17:22:14,769 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:22:14,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:22:14,770 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:22:14,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:22:14,843 INFO L356 Elim1Store]: treesize reduction 66, result has 37.7 percent of original size [2022-10-17 17:22:14,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 123 [2022-10-17 17:22:14,953 INFO L356 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2022-10-17 17:22:14,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2022-10-17 17:22:15,086 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-10-17 17:22:15,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-10-17 17:22:15,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 31 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 122 [2022-10-17 17:22:15,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:15,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:15,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,384 INFO L356 Elim1Store]: treesize reduction 246, result has 10.5 percent of original size [2022-10-17 17:22:15,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 42 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 43 case distinctions, treesize of input 508 treesize of output 519 [2022-10-17 17:22:15,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-10-17 17:22:15,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:15,666 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:22:15,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:22:15,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:15,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:15,706 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:22:15,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:22:15,788 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:22:16,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1155#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-10-17 17:22:16,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:22:16,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:22:16,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2022-10-17 17:22:16,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786967337] [2022-10-17 17:22:16,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:22:16,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 17:22:16,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:16,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 17:22:16,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-10-17 17:22:16,336 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:16,530 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-10-17 17:22:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:22:16,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-17 17:22:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:16,531 INFO L225 Difference]: With dead ends: 26 [2022-10-17 17:22:16,531 INFO L226 Difference]: Without dead ends: 24 [2022-10-17 17:22:16,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-10-17 17:22:16,532 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:16,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 15 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-10-17 17:22:16,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-10-17 17:22:16,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-10-17 17:22:16,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:16,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-10-17 17:22:16,539 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 12 [2022-10-17 17:22:16,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:16,543 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-10-17 17:22:16,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:16,544 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-10-17 17:22:16,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 17:22:16,545 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:16,545 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:16,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:16,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:16,771 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:16,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:16,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1915831248, now seen corresponding path program 5 times [2022-10-17 17:22:16,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:16,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797786397] [2022-10-17 17:22:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:16,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:16,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:22:16,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098039882] [2022-10-17 17:22:16,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:22:16,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:16,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:16,811 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:16,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 17:22:17,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-17 17:22:17,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:22:17,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 17:22:17,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:17,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:22:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:17,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:17,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797786397] [2022-10-17 17:22:17,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:22:17,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098039882] [2022-10-17 17:22:17,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098039882] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:22:17,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1958977867] [2022-10-17 17:22:17,229 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-10-17 17:22:17,230 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:22:17,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:22:17,230 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:22:17,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:22:17,340 INFO L356 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2022-10-17 17:22:17,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2022-10-17 17:22:17,444 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-10-17 17:22:17,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-10-17 17:22:17,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 30 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 105 [2022-10-17 17:22:17,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:17,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 31 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 166 [2022-10-17 17:22:17,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:17,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:17,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,772 INFO L356 Elim1Store]: treesize reduction 308, result has 0.3 percent of original size [2022-10-17 17:22:17,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 43 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 42 case distinctions, treesize of input 581 treesize of output 522 [2022-10-17 17:22:17,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-10-17 17:22:17,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,898 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:22:17,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-10-17 17:22:17,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:17,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:17,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:18,032 INFO L356 Elim1Store]: treesize reduction 248, result has 12.1 percent of original size [2022-10-17 17:22:18,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 146 treesize of output 182 [2022-10-17 17:22:18,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:18,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:18,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:18,085 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:22:18,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:22:18,101 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:22:18,403 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1326#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-10-17 17:22:18,403 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:22:18,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:22:18,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-10-17 17:22:18,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219849500] [2022-10-17 17:22:18,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:22:18,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 17:22:18,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:18,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 17:22:18,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-10-17 17:22:18,406 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:18,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:18,756 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2022-10-17 17:22:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-17 17:22:18,756 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-17 17:22:18,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:18,757 INFO L225 Difference]: With dead ends: 78 [2022-10-17 17:22:18,757 INFO L226 Difference]: Without dead ends: 58 [2022-10-17 17:22:18,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=719, Unknown=0, NotChecked=0, Total=930 [2022-10-17 17:22:18,759 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 86 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:18,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 50 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:22:18,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-10-17 17:22:18,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 34. [2022-10-17 17:22:18,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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) [2022-10-17 17:22:18,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-10-17 17:22:18,769 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 13 [2022-10-17 17:22:18,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:18,770 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-10-17 17:22:18,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:18,770 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-10-17 17:22:18,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 17:22:18,771 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:18,771 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:18,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:18,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 17:22:18,976 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:18,977 INFO L85 PathProgramCache]: Analyzing trace with hash -385990150, now seen corresponding path program 2 times [2022-10-17 17:22:18,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:18,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635637737] [2022-10-17 17:22:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:18,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:19,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:22:19,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869336899] [2022-10-17 17:22:19,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:22:19,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:19,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:19,024 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:19,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db99ad7-3645-4919-8706-23a25043065d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-17 17:22:19,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 17:22:19,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:22:19,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 51 conjunts are in the unsatisfiable core [2022-10-17 17:22:19,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:19,310 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-10-17 17:22:19,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-10-17 17:22:19,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-10-17 17:22:19,350 INFO L356 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2022-10-17 17:22:19,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 68 [2022-10-17 17:22:19,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:22:19,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 17 [2022-10-17 17:22:19,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:22:19,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 71 [2022-10-17 17:22:19,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:19,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-10-17 17:22:19,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:22:19,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-17 17:22:19,566 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-10-17 17:22:19,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 125 treesize of output 117 [2022-10-17 17:22:19,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:19,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:19,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:19,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:19,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:19,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 188 [2022-10-17 17:22:19,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:19,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:19,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 90 [2022-10-17 17:22:19,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:19,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:19,680 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:22:19,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 46 [2022-10-17 17:22:19,795 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-10-17 17:22:19,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 182 treesize of output 162 [2022-10-17 17:22:19,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:19,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:19,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:19,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:19,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:19,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 213 [2022-10-17 17:22:19,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-10-17 17:22:19,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:19,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:19,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:19,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:22:19,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:19,964 INFO L356 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2022-10-17 17:22:19,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 85 treesize of output 70 [2022-10-17 17:22:20,226 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-10-17 17:22:20,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 110 treesize of output 50 [2022-10-17 17:22:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:20,247 INFO L328 TraceCheckSpWp]: Computing backward predicates...