./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy4_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy4_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 46a2982bcd9fbf87ad95f35e8d160ffed7259af3c1cb1d5fe78d4df5a4783123 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 14:39:52,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:39:52,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:39:52,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:39:52,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:39:52,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:39:52,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:39:52,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:39:52,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:39:52,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:39:52,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:39:52,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:39:52,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:39:52,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:39:52,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:39:52,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:39:52,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:39:52,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:39:52,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:39:52,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:39:52,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:39:52,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:39:52,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:39:52,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:39:52,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:39:52,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:39:52,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:39:52,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:39:52,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:39:52,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:39:52,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:39:52,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:39:52,644 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:39:52,645 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:39:52,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:39:52,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:39:52,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:39:52,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:39:52,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:39:52,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:39:52,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:39:52,649 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:39:52,675 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:39:52,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:39:52,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:39:52,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:39:52,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:39:52,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:39:52,681 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:39:52,681 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:39:52,681 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:39:52,682 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:39:52,682 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:39:52,682 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:39:52,682 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:39:52,682 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:39:52,682 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:39:52,682 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:39:52,683 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:39:52,683 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:39:52,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:39:52,684 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:39:52,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:39:52,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:39:52,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:39:52,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:39:52,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:39:52,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:39:52,684 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:39:52,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:39:52,685 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:39:52,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:39:52,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:39:52,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:39:52,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:39:52,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:39:52,686 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:39:52,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:39:52,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:39:52,686 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:39:52,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:39:52,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:39:52,687 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:39:52,687 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_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46a2982bcd9fbf87ad95f35e8d160ffed7259af3c1cb1d5fe78d4df5a4783123 [2022-12-14 14:39:52,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:39:52,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:39:52,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:39:52,900 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:39:52,901 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:39:52,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_copy4_ground-1.i [2022-12-14 14:39:55,476 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:39:55,609 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:39:55,609 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/sv-benchmarks/c/array-examples/standard_copy4_ground-1.i [2022-12-14 14:39:55,615 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/data/7925ffbcc/ca5aed5b8e1e4455b09569c9f4aec013/FLAGd3a021f24 [2022-12-14 14:39:55,627 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/data/7925ffbcc/ca5aed5b8e1e4455b09569c9f4aec013 [2022-12-14 14:39:55,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:39:55,630 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:39:55,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:39:55,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:39:55,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:39:55,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:39:55" (1/1) ... [2022-12-14 14:39:55,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4151e3c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:55, skipping insertion in model container [2022-12-14 14:39:55,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:39:55" (1/1) ... [2022-12-14 14:39:55,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:39:55,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:39:55,750 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/sv-benchmarks/c/array-examples/standard_copy4_ground-1.i[816,829] [2022-12-14 14:39:55,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:39:55,772 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:39:55,781 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/sv-benchmarks/c/array-examples/standard_copy4_ground-1.i[816,829] [2022-12-14 14:39:55,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:39:55,802 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:39:55,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:55 WrapperNode [2022-12-14 14:39:55,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:39:55,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:39:55,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:39:55,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:39:55,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:55" (1/1) ... [2022-12-14 14:39:55,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:55" (1/1) ... [2022-12-14 14:39:55,836 INFO L138 Inliner]: procedures = 16, calls = 33, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 112 [2022-12-14 14:39:55,837 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:39:55,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:39:55,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:39:55,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:39:55,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:55" (1/1) ... [2022-12-14 14:39:55,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:55" (1/1) ... [2022-12-14 14:39:55,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:55" (1/1) ... [2022-12-14 14:39:55,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:55" (1/1) ... [2022-12-14 14:39:55,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:55" (1/1) ... [2022-12-14 14:39:55,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:55" (1/1) ... [2022-12-14 14:39:55,858 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:55" (1/1) ... [2022-12-14 14:39:55,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:55" (1/1) ... [2022-12-14 14:39:55,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:39:55,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:39:55,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:39:55,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:39:55,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:55" (1/1) ... [2022-12-14 14:39:55,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:39:55,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:39:55,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:39:55,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:39:55,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:39:55,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:39:55,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 14:39:55,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 14:39:55,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:39:55,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:39:55,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 14:39:55,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 14:39:55,984 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:39:55,986 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:39:56,105 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:39:56,140 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:39:56,141 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 14:39:56,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:39:56 BoogieIcfgContainer [2022-12-14 14:39:56,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:39:56,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:39:56,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:39:56,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:39:56,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:39:55" (1/3) ... [2022-12-14 14:39:56,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b0d4c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:39:56, skipping insertion in model container [2022-12-14 14:39:56,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:55" (2/3) ... [2022-12-14 14:39:56,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b0d4c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:39:56, skipping insertion in model container [2022-12-14 14:39:56,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:39:56" (3/3) ... [2022-12-14 14:39:56,149 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-1.i [2022-12-14 14:39:56,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:39:56,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:39:56,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:39:56,206 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;@559488b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:39:56,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:39:56,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:56,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 14:39:56,214 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:39:56,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:39:56,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:39:56,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:39:56,219 INFO L85 PathProgramCache]: Analyzing trace with hash -31482426, now seen corresponding path program 1 times [2022-12-14 14:39:56,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:39:56,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197755129] [2022-12-14 14:39:56,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:56,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:39:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:39:56,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:39:56,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197755129] [2022-12-14 14:39:56,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197755129] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:39:56,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:39:56,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:39:56,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387823502] [2022-12-14 14:39:56,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:39:56,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:39:56,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:39:56,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:39:56,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:39:56,429 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:56,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:39:56,470 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2022-12-14 14:39:56,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:39:56,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 14:39:56,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:39:56,477 INFO L225 Difference]: With dead ends: 23 [2022-12-14 14:39:56,478 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 14:39:56,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:39:56,483 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:39:56,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:39:56,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 14:39:56,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 14:39:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-12-14 14:39:56,505 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 9 [2022-12-14 14:39:56,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:39:56,506 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-12-14 14:39:56,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:56,506 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-12-14 14:39:56,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 14:39:56,506 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:39:56,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:39:56,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:39:56,507 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:39:56,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:39:56,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1696511008, now seen corresponding path program 1 times [2022-12-14 14:39:56,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:39:56,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776678635] [2022-12-14 14:39:56,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:56,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:39:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:39:56,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:39:56,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776678635] [2022-12-14 14:39:56,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776678635] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:39:56,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473993806] [2022-12-14 14:39:56,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:56,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:39:56,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:39:56,618 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:39:56,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:39:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:56,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:39:56,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:39:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:39:56,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:39:56,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473993806] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:39:56,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:39:56,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 14:39:56,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535348825] [2022-12-14 14:39:56,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:39:56,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:39:56,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:39:56,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:39:56,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:39:56,722 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2022-12-14 14:39:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:39:56,761 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2022-12-14 14:39:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:39:56,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 [2022-12-14 14:39:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:39:56,762 INFO L225 Difference]: With dead ends: 24 [2022-12-14 14:39:56,763 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 14:39:56,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:39:56,764 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:39:56,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:39:56,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 14:39:56,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 14:39:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-12-14 14:39:56,769 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2022-12-14 14:39:56,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:39:56,769 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-12-14 14:39:56,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2022-12-14 14:39:56,770 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-12-14 14:39:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 14:39:56,770 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:39:56,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:39:56,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-14 14:39:56,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:39:56,973 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:39:56,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:39:56,975 INFO L85 PathProgramCache]: Analyzing trace with hash 809250479, now seen corresponding path program 1 times [2022-12-14 14:39:56,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:39:56,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675460738] [2022-12-14 14:39:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:56,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:39:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 14:39:57,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:39:57,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675460738] [2022-12-14 14:39:57,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675460738] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:39:57,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754277672] [2022-12-14 14:39:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:57,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:39:57,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:39:57,154 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:39:57,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:39:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:57,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:39:57,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:39:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 14:39:57,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:39:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 14:39:57,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754277672] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:39:57,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1980198256] [2022-12-14 14:39:57,288 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 14:39:57,289 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:39:57,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:39:57,298 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:39:57,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:39:57,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:57,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:57,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:57,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:57,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:57,545 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 14:39:57,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 14:39:57,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:57,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:57,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:57,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:57,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:57,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-12-14 14:39:57,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:57,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:39:57,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:57,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:39:57,807 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 14:39:57,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 458 treesize of output 457 [2022-12-14 14:39:58,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:39:58,083 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:39:58,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:39:58,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:39:58,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:39:58,165 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 14:39:58,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 14:39:58,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:39:58,246 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:39:58,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:39:58,271 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:39:58,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:39:58,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:39:58,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:39:58,336 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 14:39:58,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 14:39:58,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:39:58,417 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:39:58,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:39:58,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:39:58,441 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:39:58,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:39:58,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:58,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:39:58,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:39:58,478 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:39:58,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:39:58,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:39:58,523 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:39:58,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:39:58,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:39:58,566 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:39:58,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:39:58,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:58,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:39:58,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:39:58,607 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:39:58,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:39:58,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:39:58,651 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:39:58,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:39:58,667 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:39:58,881 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '255#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:39:58,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:39:58,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:39:58,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 14:39:58,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648831218] [2022-12-14 14:39:58,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:39:58,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:39:58,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:39:58,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:39:58,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 14:39:58,882 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:58,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:39:58,909 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2022-12-14 14:39:58,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:39:58,909 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 14:39:58,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:39:58,910 INFO L225 Difference]: With dead ends: 32 [2022-12-14 14:39:58,910 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 14:39:58,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 14:39:58,911 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:39:58,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:39:58,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 14:39:58,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 14:39:58,914 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) [2022-12-14 14:39:58,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-12-14 14:39:58,915 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 14 [2022-12-14 14:39:58,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:39:58,915 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-12-14 14:39:58,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:58,916 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-12-14 14:39:58,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 14:39:58,916 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:39:58,916 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:39:58,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:39:59,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:39:59,118 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:39:59,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:39:59,119 INFO L85 PathProgramCache]: Analyzing trace with hash 767318997, now seen corresponding path program 2 times [2022-12-14 14:39:59,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:39:59,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540319612] [2022-12-14 14:39:59,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:59,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:39:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 14:39:59,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:39:59,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540319612] [2022-12-14 14:39:59,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540319612] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:39:59,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930404637] [2022-12-14 14:39:59,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:39:59,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:39:59,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:39:59,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:39:59,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:39:59,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 14:39:59,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:39:59,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:39:59,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:39:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 14:39:59,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:39:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 14:39:59,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930404637] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:39:59,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [530394714] [2022-12-14 14:39:59,390 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 14:39:59,390 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:39:59,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:39:59,391 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:39:59,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:39:59,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:59,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:59,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:59,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:59,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:59,512 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-12-14 14:39:59,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-12-14 14:39:59,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:59,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:59,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:59,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:59,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:59,662 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 14:39:59,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 14:39:59,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:59,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 14:39:59,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:59,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:59,879 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 14:39:59,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 468 treesize of output 456 [2022-12-14 14:39:59,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:39:59,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:39:59,998 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:39:59,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:00,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:00,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:00,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:00,036 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:40:00,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:40:00,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:00,072 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:00,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:00,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:00,095 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:00,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:00,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:00,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:00,131 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:40:00,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 14:40:00,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:00,163 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:00,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:00,185 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:40:00,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:40:00,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:00,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:00,244 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 14:40:00,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 14:40:00,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:00,318 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:00,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:00,342 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:40:00,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:40:00,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:00,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:00,408 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 14:40:00,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 14:40:00,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:00,462 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:00,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:00,476 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:40:00,683 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '451#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:40:00,683 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:40:00,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:40:00,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 14:40:00,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514925441] [2022-12-14 14:40:00,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:40:00,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:40:00,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:40:00,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:40:00,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 14:40:00,685 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:00,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:40:00,723 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2022-12-14 14:40:00,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:40:00,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 17 [2022-12-14 14:40:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:40:00,723 INFO L225 Difference]: With dead ends: 42 [2022-12-14 14:40:00,724 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 14:40:00,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 14:40:00,724 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:40:00,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:40:00,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 14:40:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-12-14 14:40:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:00,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-12-14 14:40:00,729 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 17 [2022-12-14 14:40:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:40:00,729 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-12-14 14:40:00,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-12-14 14:40:00,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 14:40:00,730 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:40:00,730 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:40:00,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 14:40:00,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:40:00,932 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:40:00,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:40:00,934 INFO L85 PathProgramCache]: Analyzing trace with hash 688530566, now seen corresponding path program 3 times [2022-12-14 14:40:00,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:40:00,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616793150] [2022-12-14 14:40:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:40:00,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:40:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:40:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 14:40:01,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:40:01,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616793150] [2022-12-14 14:40:01,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616793150] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:40:01,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180671309] [2022-12-14 14:40:01,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:40:01,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:40:01,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:40:01,061 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:40:01,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:40:01,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:40:01,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:40:01,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 14:40:01,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:40:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 14:40:01,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:40:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 14:40:01,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180671309] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:40:01,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [265206114] [2022-12-14 14:40:01,179 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 14:40:01,179 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:40:01,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:40:01,179 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:40:01,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:40:01,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:01,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:01,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:01,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:01,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:01,314 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 14:40:01,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 14:40:01,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:01,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:01,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:01,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:01,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:01,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-12-14 14:40:01,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:01,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:40:01,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:01,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:01,498 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 14:40:01,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 458 treesize of output 457 [2022-12-14 14:40:01,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:40:01,693 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:40:01,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:40:01,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:01,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:01,739 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 14:40:01,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 14:40:01,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:01,776 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:01,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:01,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:01,797 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:01,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:01,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:01,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:01,823 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:40:01,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 14:40:01,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:01,851 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:01,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:01,867 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:40:01,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:40:01,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:01,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:01,915 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 14:40:01,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 14:40:01,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:01,954 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:01,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:01,970 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:40:01,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:40:01,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:01,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:02,033 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 14:40:02,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 14:40:02,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:02,082 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:02,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:02,096 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:40:02,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '769#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:40:02,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:40:02,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:40:02,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 14:40:02,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563888537] [2022-12-14 14:40:02,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:40:02,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 14:40:02,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:40:02,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 14:40:02,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-12-14 14:40:02,306 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:02,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:40:02,335 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-12-14 14:40:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 14:40:02,335 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-14 14:40:02,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:40:02,336 INFO L225 Difference]: With dead ends: 62 [2022-12-14 14:40:02,336 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 14:40:02,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-12-14 14:40:02,337 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:40:02,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:40:02,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 14:40:02,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-12-14 14:40:02,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2022-12-14 14:40:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-12-14 14:40:02,340 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 29 [2022-12-14 14:40:02,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:40:02,340 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-12-14 14:40:02,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:02,340 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-12-14 14:40:02,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 14:40:02,341 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:40:02,341 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:40:02,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:40:02,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:40:02,542 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:40:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:40:02,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1289046458, now seen corresponding path program 4 times [2022-12-14 14:40:02,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:40:02,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643613981] [2022-12-14 14:40:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:40:02,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:40:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:40:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 14:40:02,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:40:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643613981] [2022-12-14 14:40:02,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643613981] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:40:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532177161] [2022-12-14 14:40:02,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 14:40:02,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:40:02,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:40:02,746 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:40:02,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:40:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:40:02,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 14:40:02,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:40:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 14:40:02,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:40:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 14:40:02,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532177161] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:40:02,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [930333551] [2022-12-14 14:40:02,985 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 14:40:02,985 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:40:02,986 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:40:02,986 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:40:02,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:40:03,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:03,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:03,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:03,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:03,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:03,131 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 14:40:03,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 14:40:03,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:03,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:03,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:03,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:03,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:03,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-12-14 14:40:03,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:03,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:40:03,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:03,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:03,307 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 14:40:03,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 458 treesize of output 457 [2022-12-14 14:40:03,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:40:03,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:03,488 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:03,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:03,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:03,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:03,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:03,515 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:40:03,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:40:03,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:03,541 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:03,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:03,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:03,560 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:03,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:03,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:03,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:03,591 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:40:03,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 14:40:03,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:03,622 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:03,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:03,639 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:40:03,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:40:03,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:03,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:03,710 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 14:40:03,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 14:40:03,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:03,760 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:03,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:03,777 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:40:03,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:40:03,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:03,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:03,824 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 14:40:03,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 14:40:03,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:03,882 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:03,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:03,894 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:40:04,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1187#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:40:04,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:40:04,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:40:04,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 14:40:04,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837350228] [2022-12-14 14:40:04,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:40:04,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 14:40:04,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:40:04,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 14:40:04,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-12-14 14:40:04,034 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:04,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:40:04,075 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2022-12-14 14:40:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 14:40:04,075 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-12-14 14:40:04,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:40:04,076 INFO L225 Difference]: With dead ends: 74 [2022-12-14 14:40:04,076 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 14:40:04,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-12-14 14:40:04,078 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:40:04,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:40:04,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 14:40:04,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-12-14 14:40:04,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-12-14 14:40:04,082 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 35 [2022-12-14 14:40:04,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:40:04,082 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-12-14 14:40:04,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-12-14 14:40:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 14:40:04,083 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:40:04,083 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:40:04,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 14:40:04,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 14:40:04,285 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:40:04,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:40:04,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1399133754, now seen corresponding path program 5 times [2022-12-14 14:40:04,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:40:04,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466745065] [2022-12-14 14:40:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:40:04,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:40:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:40:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 14:40:04,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:40:04,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466745065] [2022-12-14 14:40:04,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466745065] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:40:04,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918676833] [2022-12-14 14:40:04,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:40:04,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:40:04,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:40:04,723 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:40:04,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:40:04,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:40:04,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:40:04,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 14:40:04,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:40:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-12-14 14:40:04,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:40:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-12-14 14:40:04,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918676833] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:40:04,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2005068678] [2022-12-14 14:40:04,945 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 14:40:04,945 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:40:04,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:40:04,945 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:40:04,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:40:04,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:04,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:04,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:05,049 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-12-14 14:40:05,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-12-14 14:40:05,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:05,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:05,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:05,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:05,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:05,173 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 14:40:05,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 14:40:05,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:05,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:40:05,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:05,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:05,337 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 14:40:05,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 458 treesize of output 457 [2022-12-14 14:40:05,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:40:05,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:05,520 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:05,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:05,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:05,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:05,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:05,548 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:40:05,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:40:05,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:05,574 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:05,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:05,592 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:40:05,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:40:05,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:05,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:05,648 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 14:40:05,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 14:40:05,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:05,690 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:05,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:05,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:05,711 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:05,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:05,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:05,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:05,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:05,742 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:40:05,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:40:05,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:05,778 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:05,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:05,806 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:40:05,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:40:05,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:05,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:05,849 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 14:40:05,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 14:40:05,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:05,887 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:05,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:05,897 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:40:06,235 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1735#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:40:06,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:40:06,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:40:06,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-12-14 14:40:06,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554157304] [2022-12-14 14:40:06,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:40:06,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 14:40:06,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:40:06,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 14:40:06,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 14:40:06,238 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:40:06,345 INFO L93 Difference]: Finished difference Result 99 states and 133 transitions. [2022-12-14 14:40:06,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 14:40:06,346 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-12-14 14:40:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:40:06,347 INFO L225 Difference]: With dead ends: 99 [2022-12-14 14:40:06,347 INFO L226 Difference]: Without dead ends: 74 [2022-12-14 14:40:06,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 14:40:06,348 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:40:06,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:40:06,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-14 14:40:06,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-12-14 14:40:06,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.082191780821918) internal successors, (79), 73 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:06,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2022-12-14 14:40:06,353 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 47 [2022-12-14 14:40:06,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:40:06,353 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2022-12-14 14:40:06,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:06,353 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2022-12-14 14:40:06,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 14:40:06,354 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:40:06,354 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:40:06,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 14:40:06,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:40:06,556 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:40:06,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:40:06,557 INFO L85 PathProgramCache]: Analyzing trace with hash -272778496, now seen corresponding path program 6 times [2022-12-14 14:40:06,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:40:06,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434808948] [2022-12-14 14:40:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:40:06,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:40:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:40:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 14:40:07,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:40:07,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434808948] [2022-12-14 14:40:07,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434808948] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:40:07,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230916527] [2022-12-14 14:40:07,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:40:07,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:40:07,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:40:07,087 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:40:07,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 14:40:07,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:40:07,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:40:07,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 14:40:07,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:40:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 14:40:07,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:40:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 14:40:07,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230916527] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:40:07,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1383396962] [2022-12-14 14:40:07,793 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 14:40:07,793 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:40:07,793 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:40:07,793 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:40:07,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:40:07,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:07,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:07,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:07,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:07,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:07,881 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-12-14 14:40:07,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-12-14 14:40:07,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:07,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:07,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:07,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:07,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:08,023 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 14:40:08,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 14:40:08,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:08,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 14:40:08,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:08,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:08,170 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 14:40:08,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 468 treesize of output 456 [2022-12-14 14:40:08,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:40:08,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:08,312 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:08,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:08,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:08,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:08,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:08,345 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:40:08,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:40:08,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:08,376 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:08,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:08,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:08,396 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:08,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:08,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:08,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:08,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:08,430 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:40:08,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:40:08,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:08,459 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:08,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:08,479 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:40:08,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:40:08,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:08,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:08,537 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 14:40:08,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 14:40:08,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:08,620 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:08,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:08,638 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:40:08,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:40:08,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:08,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:08,715 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 14:40:08,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 14:40:08,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:08,783 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:08,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:08,796 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:40:09,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2549#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:40:09,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:40:09,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:40:09,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-12-14 14:40:09,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600765407] [2022-12-14 14:40:09,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:40:09,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 14:40:09,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:40:09,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 14:40:09,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 14:40:09,093 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:40:09,185 INFO L93 Difference]: Finished difference Result 148 states and 182 transitions. [2022-12-14 14:40:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 14:40:09,186 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 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 72 [2022-12-14 14:40:09,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:40:09,187 INFO L225 Difference]: With dead ends: 148 [2022-12-14 14:40:09,187 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 14:40:09,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 14:40:09,189 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:40:09,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:40:09,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 14:40:09,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-12-14 14:40:09,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0612244897959184) internal successors, (104), 98 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:09,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2022-12-14 14:40:09,196 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 72 [2022-12-14 14:40:09,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:40:09,196 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2022-12-14 14:40:09,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:09,196 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2022-12-14 14:40:09,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 14:40:09,197 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:40:09,197 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:40:09,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 14:40:09,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:40:09,398 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:40:09,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:40:09,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1167513498, now seen corresponding path program 7 times [2022-12-14 14:40:09,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:40:09,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774985933] [2022-12-14 14:40:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:40:09,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:40:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:40:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 14:40:10,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:40:10,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774985933] [2022-12-14 14:40:10,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774985933] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:40:10,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817831750] [2022-12-14 14:40:10,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 14:40:10,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:40:10,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:40:10,763 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:40:10,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 14:40:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:40:10,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 14:40:10,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:40:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 14:40:10,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:40:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 14:40:12,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817831750] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:40:12,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1305754561] [2022-12-14 14:40:12,981 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 14:40:12,981 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:40:12,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:40:12,981 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:40:12,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:40:13,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:13,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:13,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:13,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:13,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:13,129 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 14:40:13,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 14:40:13,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:13,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:13,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:13,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:13,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:13,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-12-14 14:40:13,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:13,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:40:13,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:13,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:13,299 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 14:40:13,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 458 treesize of output 457 [2022-12-14 14:40:13,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:40:13,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:13,479 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:13,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:13,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:13,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:13,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:13,510 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:40:13,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:40:13,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:13,537 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:13,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:13,554 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:40:13,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:40:13,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:13,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:13,619 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 14:40:13,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 14:40:13,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:13,659 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:13,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:13,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:13,675 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:13,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:13,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:13,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:13,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:13,705 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:40:13,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:40:13,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:13,744 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:13,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:13,770 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:40:13,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:40:13,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:13,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:13,835 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 14:40:13,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 14:40:13,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:13,872 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:13,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:13,881 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:40:14,712 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3711#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:40:14,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:40:14,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:40:14,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-12-14 14:40:14,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067148300] [2022-12-14 14:40:14,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:40:14,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-12-14 14:40:14,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:40:14,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-12-14 14:40:14,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 14:40:14,716 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 100 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:14,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:40:14,834 INFO L93 Difference]: Finished difference Result 198 states and 257 transitions. [2022-12-14 14:40:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-14 14:40:14,835 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 100 states have internal predecessors, (113), 0 states have call successors, (0), 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 97 [2022-12-14 14:40:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:40:14,836 INFO L225 Difference]: With dead ends: 198 [2022-12-14 14:40:14,836 INFO L226 Difference]: Without dead ends: 149 [2022-12-14 14:40:14,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 224 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 14:40:14,839 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:40:14,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:40:14,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-12-14 14:40:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-12-14 14:40:14,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0405405405405406) internal successors, (154), 148 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:14,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2022-12-14 14:40:14,850 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 97 [2022-12-14 14:40:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:40:14,851 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2022-12-14 14:40:14,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 100 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:14,851 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2022-12-14 14:40:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 14:40:14,853 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:40:14,853 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:40:14,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 14:40:15,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 14:40:15,055 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:40:15,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:40:15,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1243447718, now seen corresponding path program 8 times [2022-12-14 14:40:15,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:40:15,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238783420] [2022-12-14 14:40:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:40:15,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:40:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:40:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 14:40:19,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:40:19,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238783420] [2022-12-14 14:40:19,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238783420] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:40:19,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228410776] [2022-12-14 14:40:19,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:40:19,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:40:19,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:40:19,066 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:40:19,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 14:40:21,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 14:40:21,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:40:21,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 14:40:21,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:40:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5016 trivial. 0 not checked. [2022-12-14 14:40:21,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:40:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5016 trivial. 0 not checked. [2022-12-14 14:40:22,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228410776] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:40:22,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [688727214] [2022-12-14 14:40:22,072 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 14:40:22,072 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:40:22,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:40:22,073 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:40:22,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:40:22,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:22,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:22,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:22,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:22,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:22,177 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-12-14 14:40:22,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-12-14 14:40:22,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:22,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:22,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:22,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:22,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:22,331 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 14:40:22,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 14:40:22,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:22,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 14:40:22,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:22,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:22,485 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 14:40:22,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 468 treesize of output 456 [2022-12-14 14:40:22,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:40:22,613 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:40:22,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:40:22,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:22,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:22,672 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 14:40:22,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 14:40:22,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:22,711 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:22,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:22,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:22,727 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:22,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:22,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:22,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:22,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:22,755 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:40:22,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:40:22,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:22,780 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:22,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:22,797 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:40:22,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:40:22,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:22,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:22,837 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 14:40:22,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 14:40:22,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:22,886 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:22,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:22,902 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:40:22,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:40:22,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:22,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:22,945 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 14:40:22,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 14:40:23,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:23,006 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:23,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:23,020 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:40:23,479 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5395#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:40:23,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:40:23,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:40:23,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-12-14 14:40:23,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652133291] [2022-12-14 14:40:23,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:40:23,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-12-14 14:40:23,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:40:23,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-12-14 14:40:23,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 14:40:23,484 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 123 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:23,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:40:23,737 INFO L93 Difference]: Finished difference Result 247 states and 305 transitions. [2022-12-14 14:40:23,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-12-14 14:40:23,738 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 123 states have internal predecessors, (139), 0 states have call successors, (0), 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 147 [2022-12-14 14:40:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:40:23,739 INFO L225 Difference]: With dead ends: 247 [2022-12-14 14:40:23,739 INFO L226 Difference]: Without dead ends: 198 [2022-12-14 14:40:23,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 14:40:23,742 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:40:23,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:40:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-12-14 14:40:23,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-12-14 14:40:23,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0304568527918783) internal successors, (203), 197 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2022-12-14 14:40:23,750 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 147 [2022-12-14 14:40:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:40:23,750 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2022-12-14 14:40:23,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 123 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:23,750 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2022-12-14 14:40:23,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-12-14 14:40:23,752 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:40:23,752 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:40:23,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 14:40:23,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 14:40:23,954 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:40:23,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:40:23,956 INFO L85 PathProgramCache]: Analyzing trace with hash 79955008, now seen corresponding path program 9 times [2022-12-14 14:40:23,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:40:23,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8542112] [2022-12-14 14:40:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:40:23,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:40:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:40:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5962 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-12-14 14:40:28,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:40:28,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8542112] [2022-12-14 14:40:28,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8542112] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:40:28,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806891979] [2022-12-14 14:40:28,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:40:28,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:40:28,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:40:28,622 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:40:28,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 14:40:28,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:40:28,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:40:28,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 101 conjunts are in the unsatisfiable core [2022-12-14 14:40:28,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:40:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5962 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-12-14 14:40:29,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:40:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5962 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-12-14 14:40:35,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806891979] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:40:35,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1829872578] [2022-12-14 14:40:35,265 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 14:40:35,265 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:40:35,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:40:35,266 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:40:35,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:40:35,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:35,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:35,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:35,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:35,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:35,391 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 14:40:35,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 14:40:35,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:35,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:35,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:35,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:35,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:35,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-12-14 14:40:35,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:35,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 14:40:35,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:35,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:35,576 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 14:40:35,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 468 treesize of output 456 [2022-12-14 14:40:35,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:40:35,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:35,686 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:35,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:35,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:35,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:35,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:35,713 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:40:35,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:40:35,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:35,737 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:35,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:35,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:35,751 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:35,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:35,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:35,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:35,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:35,777 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:40:35,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:40:35,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:35,805 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:35,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:35,821 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:40:35,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:40:35,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:35,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:35,872 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 14:40:35,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 14:40:35,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:35,915 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:35,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:35,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:35,932 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:35,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:35,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:40:35,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:35,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:35,962 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:40:35,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:40:35,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:40:36,000 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:40:36,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:40:36,016 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:40:37,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7649#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:40:37,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:40:37,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:40:37,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-12-14 14:40:37,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597146816] [2022-12-14 14:40:37,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:40:37,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-12-14 14:40:37,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:40:38,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-12-14 14:40:38,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-12-14 14:40:38,008 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 202 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:38,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:40:38,312 INFO L93 Difference]: Finished difference Result 396 states and 506 transitions. [2022-12-14 14:40:38,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-12-14 14:40:38,312 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 202 states have internal predecessors, (215), 0 states have call successors, (0), 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 196 [2022-12-14 14:40:38,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:40:38,313 INFO L225 Difference]: With dead ends: 396 [2022-12-14 14:40:38,313 INFO L226 Difference]: Without dead ends: 299 [2022-12-14 14:40:38,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 458 SyntacticMatches, 23 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8796 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-12-14 14:40:38,316 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:40:38,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:40:38,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-12-14 14:40:38,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-12-14 14:40:38,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.0201342281879195) internal successors, (304), 298 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:38,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 304 transitions. [2022-12-14 14:40:38,325 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 304 transitions. Word has length 196 [2022-12-14 14:40:38,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:40:38,325 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 304 transitions. [2022-12-14 14:40:38,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 202 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:40:38,325 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 304 transitions. [2022-12-14 14:40:38,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-12-14 14:40:38,328 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:40:38,328 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:40:38,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 14:40:38,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:40:38,529 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:40:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:40:38,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2029195226, now seen corresponding path program 10 times [2022-12-14 14:40:38,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:40:38,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087854786] [2022-12-14 14:40:38,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:40:38,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:40:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:40:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 21112 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-12-14 14:40:55,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:40:55,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087854786] [2022-12-14 14:40:55,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087854786] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:40:55,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942283442] [2022-12-14 14:40:55,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 14:40:55,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:40:55,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:40:55,093 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:40:55,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 14:40:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:40:55,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 2538 conjuncts, 202 conjunts are in the unsatisfiable core [2022-12-14 14:40:55,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:40:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21112 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-12-14 14:40:55,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:41:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 21112 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-12-14 14:41:24,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942283442] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:41:24,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1573051349] [2022-12-14 14:41:24,276 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 14:41:24,276 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:41:24,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:41:24,277 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:41:24,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:41:24,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:41:24,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:41:24,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:41:24,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:41:24,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:41:24,370 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-12-14 14:41:24,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-12-14 14:41:24,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:41:24,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:41:24,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:41:24,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:41:24,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:41:24,475 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 14:41:24,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 14:41:24,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:41:24,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:41:24,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:41:24,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:41:24,626 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 14:41:24,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 458 treesize of output 457 [2022-12-14 14:41:24,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:41:24,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:41:24,797 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:41:24,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:41:24,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:41:24,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:41:24,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:41:24,828 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:41:24,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:41:24,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:41:24,856 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:41:24,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:41:24,873 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:41:24,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:41:24,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:41:24,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:41:24,925 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 14:41:24,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 14:41:24,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:41:24,965 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:41:24,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:41:24,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:41:24,985 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:41:24,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:41:25,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:41:25,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:41:25,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:41:25,017 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:41:25,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:41:25,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:41:25,050 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:41:25,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:41:25,078 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:41:25,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:41:25,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:41:25,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:41:25,126 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 14:41:25,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 14:41:25,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:41:25,173 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:41:25,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:41:25,183 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:41:29,337 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11211#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:41:29,337 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:41:29,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:41:29,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-12-14 14:41:29,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448063398] [2022-12-14 14:41:29,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:41:29,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-12-14 14:41:29,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:41:29,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-12-14 14:41:29,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-12-14 14:41:29,355 INFO L87 Difference]: Start difference. First operand 299 states and 304 transitions. Second operand has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 404 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:41:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:41:30,976 INFO L93 Difference]: Finished difference Result 598 states and 809 transitions. [2022-12-14 14:41:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-12-14 14:41:30,977 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 404 states have internal predecessors, (417), 0 states have call successors, (0), 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 297 [2022-12-14 14:41:30,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:41:30,978 INFO L225 Difference]: With dead ends: 598 [2022-12-14 14:41:30,978 INFO L226 Difference]: Without dead ends: 501 [2022-12-14 14:41:30,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 660 SyntacticMatches, 23 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17684 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-12-14 14:41:30,986 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:41:30,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:41:30,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-12-14 14:41:30,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2022-12-14 14:41:30,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.012) internal successors, (506), 500 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:41:30,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 506 transitions. [2022-12-14 14:41:30,999 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 506 transitions. Word has length 297 [2022-12-14 14:41:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:41:31,000 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 506 transitions. [2022-12-14 14:41:31,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 404 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:41:31,000 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 506 transitions. [2022-12-14 14:41:31,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2022-12-14 14:41:31,008 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:41:31,008 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:41:31,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 14:41:31,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:41:31,210 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:41:31,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:41:31,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1791819878, now seen corresponding path program 11 times [2022-12-14 14:41:31,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:41:31,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879365558] [2022-12-14 14:41:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:41:31,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:41:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:42:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 82015 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-12-14 14:42:44,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:42:44,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879365558] [2022-12-14 14:42:44,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879365558] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:42:44,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803232762] [2022-12-14 14:42:44,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:42:44,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:42:44,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:42:44,631 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:42:44,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 14:44:10,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 14:44:10,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:44:10,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-14 14:44:10,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:44:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 82015 backedges. 446 proven. 253 refuted. 0 times theorem prover too weak. 81316 trivial. 0 not checked. [2022-12-14 14:44:13,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:44:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 82015 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81762 trivial. 0 not checked. [2022-12-14 14:44:17,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803232762] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:44:17,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1829400349] [2022-12-14 14:44:17,198 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 14:44:17,198 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:44:17,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:44:17,199 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:44:17,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:44:17,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:44:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:44:17,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:44:17,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:44:17,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:44:17,322 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 14:44:17,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 14:44:17,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:44:17,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:44:17,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:44:17,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:44:17,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:44:17,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-12-14 14:44:17,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:44:17,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:44:17,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:44:17,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:44:17,490 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 14:44:17,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 458 treesize of output 457 [2022-12-14 14:44:17,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:44:17,717 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:44:17,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:44:17,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:44:17,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:44:17,774 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 14:44:17,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 14:44:17,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:44:17,823 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:44:17,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:44:17,840 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:44:17,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:44:17,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:44:17,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:44:17,891 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 14:44:17,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 14:44:17,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:44:17,943 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:44:17,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:44:17,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:44:17,965 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:44:17,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:44:17,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:44:17,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:44:17,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:44:17,998 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:44:17,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:44:18,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:44:18,039 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:44:18,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:44:18,072 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:44:18,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:44:18,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:44:18,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:44:18,129 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 14:44:18,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 14:44:18,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:44:18,204 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:44:18,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:44:18,216 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:44:26,160 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16841#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:44:26,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:44:26,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:44:26,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 27, 25] total 453 [2022-12-14 14:44:26,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598485971] [2022-12-14 14:44:26,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:44:26,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 453 states [2022-12-14 14:44:26,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:44:26,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 453 interpolants. [2022-12-14 14:44:26,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83408, Invalid=125898, Unknown=0, NotChecked=0, Total=209306 [2022-12-14 14:44:26,179 INFO L87 Difference]: Start difference. First operand 501 states and 506 transitions. Second operand has 453 states, 453 states have (on average 1.0507726269315674) internal successors, (476), 453 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:44:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:44:35,798 INFO L93 Difference]: Finished difference Result 695 states and 801 transitions. [2022-12-14 14:44:35,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 454 states. [2022-12-14 14:44:35,799 INFO L78 Accepts]: Start accepts. Automaton has has 453 states, 453 states have (on average 1.0507726269315674) internal successors, (476), 453 states have internal predecessors, (476), 0 states have call successors, (0), 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 499 [2022-12-14 14:44:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:44:35,803 INFO L225 Difference]: With dead ends: 695 [2022-12-14 14:44:35,803 INFO L226 Difference]: Without dead ends: 598 [2022-12-14 14:44:35,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1994 GetRequests, 1467 SyntacticMatches, 23 SemanticMatches, 504 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34319 ImplicationChecksByTransitivity, 59.3s TimeCoverageRelationStatistics Valid=85809, Invalid=169721, Unknown=0, NotChecked=0, Total=255530 [2022-12-14 14:44:35,813 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 224 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 14:44:35,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 64 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [564 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 14:44:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-12-14 14:44:35,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2022-12-14 14:44:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.0100502512562815) internal successors, (603), 597 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:44:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 603 transitions. [2022-12-14 14:44:35,829 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 603 transitions. Word has length 499 [2022-12-14 14:44:35,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:44:35,829 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 603 transitions. [2022-12-14 14:44:35,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 453 states, 453 states have (on average 1.0507726269315674) internal successors, (476), 453 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:44:35,830 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 603 transitions. [2022-12-14 14:44:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2022-12-14 14:44:35,832 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:44:35,832 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:44:35,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 14:44:36,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 14:44:36,033 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:44:36,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:44:36,034 INFO L85 PathProgramCache]: Analyzing trace with hash 535207872, now seen corresponding path program 12 times [2022-12-14 14:44:36,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:44:36,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205142784] [2022-12-14 14:44:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:36,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:44:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 85730 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-12-14 14:45:59,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:59,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205142784] [2022-12-14 14:45:59,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205142784] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:45:59,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983784968] [2022-12-14 14:45:59,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:45:59,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:59,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:45:59,322 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:45:59,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 14:46:00,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:46:00,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:46:00,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 5037 conjuncts, 405 conjunts are in the unsatisfiable core [2022-12-14 14:46:00,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:46:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 85730 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-12-14 14:46:00,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:48:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 85730 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-12-14 14:48:01,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983784968] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:48:01,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [157768241] [2022-12-14 14:48:01,107 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 14:48:01,107 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:48:01,107 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:48:01,107 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:48:01,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:48:01,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:48:01,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:48:01,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:48:01,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:48:01,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:48:01,187 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-12-14 14:48:01,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-12-14 14:48:01,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:48:01,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:48:01,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:48:01,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:48:01,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:48:01,313 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 14:48:01,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 14:48:01,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:48:01,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 14:48:01,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:48:01,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:48:01,495 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 14:48:01,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 468 treesize of output 456 [2022-12-14 14:48:01,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:48:01,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:48:01,599 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:48:01,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:48:01,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:48:01,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:48:01,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:48:01,628 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:48:01,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:48:01,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:48:01,656 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:48:01,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:48:01,673 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:48:01,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:48:01,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:48:01,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:48:01,732 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 14:48:01,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 14:48:01,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:48:01,775 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:48:01,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:48:01,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:48:01,791 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:48:01,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:48:01,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:48:01,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:48:01,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:48:01,824 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 14:48:01,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 103 [2022-12-14 14:48:01,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:48:01,860 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:48:01,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:48:01,887 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:48:01,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:48:01,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:48:01,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:48:01,931 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 14:48:01,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 14:48:01,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:48:01,975 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:48:01,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:48:01,986 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:48:16,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23942#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:48:16,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:48:16,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:48:16,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 405, 405] total 810 [2022-12-14 14:48:16,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777884811] [2022-12-14 14:48:16,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:48:16,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-12-14 14:48:16,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:48:16,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-12-14 14:48:16,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-12-14 14:48:16,250 INFO L87 Difference]: Start difference. First operand 598 states and 603 transitions. Second operand has 811 states, 811 states have (on average 1.0147965474722564) internal successors, (823), 810 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:48:28,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:48:28,165 INFO L93 Difference]: Finished difference Result 1196 states and 1610 transitions. [2022-12-14 14:48:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-12-14 14:48:28,166 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0147965474722564) internal successors, (823), 810 states have internal predecessors, (823), 0 states have call successors, (0), 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 596 [2022-12-14 14:48:28,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:48:28,168 INFO L225 Difference]: With dead ends: 1196 [2022-12-14 14:48:28,168 INFO L226 Difference]: Without dead ends: 1003 [2022-12-14 14:48:28,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2191 GetRequests, 1330 SyntacticMatches, 47 SemanticMatches, 814 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64636 ImplicationChecksByTransitivity, 175.1s TimeCoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-12-14 14:48:28,196 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:48:28,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 14:48:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-12-14 14:48:28,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 1003. [2022-12-14 14:48:28,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 1.0059880239520957) internal successors, (1008), 1002 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:48:28,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1008 transitions. [2022-12-14 14:48:28,221 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1008 transitions. Word has length 596 [2022-12-14 14:48:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:48:28,221 INFO L495 AbstractCegarLoop]: Abstraction has 1003 states and 1008 transitions. [2022-12-14 14:48:28,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0147965474722564) internal successors, (823), 810 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:48:28,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1008 transitions. [2022-12-14 14:48:28,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1002 [2022-12-14 14:48:28,227 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:48:28,227 INFO L195 NwaCegarLoop]: trace histogram [808, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:48:28,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 14:48:28,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b57735aa-9d2a-4d87-affa-6459c7168723/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 14:48:28,428 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:48:28,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:48:28,428 INFO L85 PathProgramCache]: Analyzing trace with hash -663859802, now seen corresponding path program 13 times [2022-12-14 14:48:28,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:48:28,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638391743] [2022-12-14 14:48:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:48:28,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:48:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat