./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy9_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy9_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V --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 aab03c22d13215fab0d6755eff6eea090232335ae63c67c9d83313131cbb4c89 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:40:42,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:40:42,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:40:42,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:40:42,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:40:42,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:40:42,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:40:42,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:40:42,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:40:42,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:40:42,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:40:42,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:40:42,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:40:42,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:40:42,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:40:42,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:40:42,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:40:42,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:40:42,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:40:42,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:40:42,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:40:42,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:40:42,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:40:42,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:40:42,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:40:42,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:40:42,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:40:42,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:40:42,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:40:42,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:40:42,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:40:42,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:40:42,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:40:42,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:40:42,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:40:42,842 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:40:42,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:40:42,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:40:42,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:40:42,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:40:42,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:40:42,850 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:40:42,883 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:40:42,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:40:42,884 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:40:42,884 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:40:42,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:40:42,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:40:42,886 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:40:42,886 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:40:42,887 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:40:42,887 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:40:42,888 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:40:42,888 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:40:42,888 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:40:42,889 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:40:42,889 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:40:42,890 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:40:42,890 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:40:42,890 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:40:42,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:40:42,892 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:40:42,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:40:42,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:40:42,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:40:42,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:40:42,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:40:42,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:40:42,894 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:40:42,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:40:42,895 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:40:42,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:40:42,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:40:42,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:40:42,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:40:42,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:40:42,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:40:42,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:40:42,898 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:40:42,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:40:42,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:40:42,899 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:40:42,899 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:40:42,899 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aab03c22d13215fab0d6755eff6eea090232335ae63c67c9d83313131cbb4c89 [2021-11-23 02:40:43,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:40:43,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:40:43,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:40:43,238 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:40:43,238 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:40:43,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-examples/standard_copy9_ground-2.i [2021-11-23 02:40:43,373 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/data/33b64afa2/b194fbf576ad4e989da12cd3b1b06ff9/FLAGdda3fe862 [2021-11-23 02:40:43,945 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:40:43,946 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/sv-benchmarks/c/array-examples/standard_copy9_ground-2.i [2021-11-23 02:40:43,955 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/data/33b64afa2/b194fbf576ad4e989da12cd3b1b06ff9/FLAGdda3fe862 [2021-11-23 02:40:44,331 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/data/33b64afa2/b194fbf576ad4e989da12cd3b1b06ff9 [2021-11-23 02:40:44,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:40:44,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:40:44,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:40:44,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:40:44,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:40:44,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:40:44" (1/1) ... [2021-11-23 02:40:44,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@96c44a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:44, skipping insertion in model container [2021-11-23 02:40:44,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:40:44" (1/1) ... [2021-11-23 02:40:44,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:40:44,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:40:44,549 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/sv-benchmarks/c/array-examples/standard_copy9_ground-2.i[816,829] [2021-11-23 02:40:44,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:40:44,580 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:40:44,593 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/sv-benchmarks/c/array-examples/standard_copy9_ground-2.i[816,829] [2021-11-23 02:40:44,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:40:44,622 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:40:44,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:44 WrapperNode [2021-11-23 02:40:44,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:40:44,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:40:44,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:40:44,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:40:44,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:44" (1/1) ... [2021-11-23 02:40:44,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:44" (1/1) ... [2021-11-23 02:40:44,673 INFO L137 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 192 [2021-11-23 02:40:44,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:40:44,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:40:44,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:40:44,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:40:44,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:44" (1/1) ... [2021-11-23 02:40:44,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:44" (1/1) ... [2021-11-23 02:40:44,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:44" (1/1) ... [2021-11-23 02:40:44,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:44" (1/1) ... [2021-11-23 02:40:44,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:44" (1/1) ... [2021-11-23 02:40:44,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:44" (1/1) ... [2021-11-23 02:40:44,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:44" (1/1) ... [2021-11-23 02:40:44,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:40:44,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:40:44,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:40:44,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:40:44,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:44" (1/1) ... [2021-11-23 02:40:44,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:40:44,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:44,783 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:40:44,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:40:44,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:40:44,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:40:44,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:40:44,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:40:44,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:40:44,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:40:44,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:40:44,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:40:44,901 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:40:44,903 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:40:45,133 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:40:45,225 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:40:45,225 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-23 02:40:45,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:40:45 BoogieIcfgContainer [2021-11-23 02:40:45,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:40:45,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:40:45,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:40:45,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:40:45,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:40:44" (1/3) ... [2021-11-23 02:40:45,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78da3b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:40:45, skipping insertion in model container [2021-11-23 02:40:45,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:44" (2/3) ... [2021-11-23 02:40:45,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78da3b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:40:45, skipping insertion in model container [2021-11-23 02:40:45,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:40:45" (3/3) ... [2021-11-23 02:40:45,238 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-2.i [2021-11-23 02:40:45,244 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:40:45,245 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:40:45,301 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:40:45,311 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:40:45,312 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:40:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 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) [2021-11-23 02:40:45,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 02:40:45,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:45,343 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:45,344 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:45,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:45,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1813374179, now seen corresponding path program 1 times [2021-11-23 02:40:45,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:45,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058510138] [2021-11-23 02:40:45,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:45,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:40:45,620 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:45,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058510138] [2021-11-23 02:40:45,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058510138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:45,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:45,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:40:45,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836761446] [2021-11-23 02:40:45,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:45,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:40:45,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:45,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:40:45,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:40:45,672 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 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 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:40:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:45,796 INFO L93 Difference]: Finished difference Result 33 states and 55 transitions. [2021-11-23 02:40:45,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:40:45,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 02:40:45,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:45,807 INFO L225 Difference]: With dead ends: 33 [2021-11-23 02:40:45,809 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 02:40:45,812 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:40:45,817 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:45,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:40:45,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 02:40:45,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 02:40:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:40:45,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2021-11-23 02:40:45,862 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 14 [2021-11-23 02:40:45,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:45,863 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2021-11-23 02:40:45,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:40:45,864 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2021-11-23 02:40:45,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 02:40:45,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:45,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:45,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:40:45,867 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:45,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:45,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1669124400, now seen corresponding path program 1 times [2021-11-23 02:40:45,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:45,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365259648] [2021-11-23 02:40:45,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:45,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:40:45,959 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:45,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365259648] [2021-11-23 02:40:45,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365259648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:40:45,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312880721] [2021-11-23 02:40:45,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:45,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:45,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:45,963 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:40:45,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:40:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:46,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:40:46,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:40:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:40:46,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:40:46,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312880721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:46,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:40:46,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 02:40:46,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689574121] [2021-11-23 02:40:46,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:46,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:40:46,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:46,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:40:46,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:40:46,125 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:40:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:46,194 INFO L93 Difference]: Finished difference Result 39 states and 66 transitions. [2021-11-23 02:40:46,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:40:46,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 02:40:46,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:46,196 INFO L225 Difference]: With dead ends: 39 [2021-11-23 02:40:46,196 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 02:40:46,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:40:46,198 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:46,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:40:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 02:40:46,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-23 02:40:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2021-11-23 02:40:46,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-11-23 02:40:46,206 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 15 [2021-11-23 02:40:46,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:46,206 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-11-23 02:40:46,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:40:46,207 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-11-23 02:40:46,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 02:40:46,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:46,208 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:46,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:40:46,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:46,426 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:46,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:46,427 INFO L85 PathProgramCache]: Analyzing trace with hash 751608974, now seen corresponding path program 1 times [2021-11-23 02:40:46,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:46,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698493253] [2021-11-23 02:40:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:46,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:40:46,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:46,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698493253] [2021-11-23 02:40:46,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698493253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:40:46,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119595531] [2021-11-23 02:40:46,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:46,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:46,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:46,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:40:46,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:40:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:46,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:40:46,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:40:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:40:46,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:40:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:40:46,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119595531] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:40:46,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [932220438] [2021-11-23 02:40:46,795 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:40:46,795 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:40:46,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:40:46,809 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:40:46,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:40:46,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:46,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:46,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:46,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:46,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:46,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:46,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:46,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:46,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:46,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:47,807 INFO L354 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2021-11-23 02:40:47,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2021-11-23 02:40:47,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:47,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:48,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:48,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:48,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:48,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:48,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:48,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:48,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:48,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,109 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:40:49,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:40:49,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 02:40:49,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 52 [2021-11-23 02:40:49,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 02:40:49,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:49,657 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:49,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:49,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:49,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:49,776 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:40:49,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:40:49,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:49,858 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:49,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:49,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:49,929 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:40:49,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:40:50,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:50,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:50,124 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:40:50,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 64 [2021-11-23 02:40:50,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:50,247 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:50,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:50,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:50,328 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:40:50,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:40:50,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:50,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:50,503 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:40:50,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 64 [2021-11-23 02:40:50,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:50,604 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:50,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:50,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:50,663 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:50,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:50,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:50,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:50,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:50,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:50,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:50,769 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:40:50,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:40:50,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:50,840 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:50,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:50,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:50,906 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:50,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:50,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:50,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:50,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:51,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:51,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:51,020 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:40:51,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:40:51,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:51,090 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:51,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:51,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:51,140 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:51,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:51,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:51,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:51,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:51,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:51,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:51,237 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:40:51,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:40:51,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:51,315 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:51,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:51,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:51,374 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:51,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:51,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:51,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:51,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:51,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:51,476 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:40:51,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:40:51,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:51,533 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:51,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:51,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:51,585 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:40:51,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:40:51,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:51,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:51,709 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:40:51,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 74 [2021-11-23 02:40:51,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:51,816 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:51,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:51,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:51,896 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:40:51,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:40:51,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:51,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:52,037 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:40:52,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 74 [2021-11-23 02:40:52,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:52,122 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:52,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:52,177 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:40:52,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '415#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (<= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#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)))) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a6~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.offset|) (<= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.offset|) (<= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a7~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.offset|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#a4~0#1.offset|) (<= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2021-11-23 02:40:52,704 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:40:52,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:40:52,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-23 02:40:52,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770851126] [2021-11-23 02:40:52,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:40:52,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:40:52,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:52,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:40:52,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:40:52,706 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:40:52,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:52,793 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2021-11-23 02:40:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:40:52,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-23 02:40:52,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:52,794 INFO L225 Difference]: With dead ends: 52 [2021-11-23 02:40:52,794 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 02:40:52,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:40:52,796 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:52,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:40:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 02:40:52,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-23 02:40:52,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:40:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-11-23 02:40:52,802 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2021-11-23 02:40:52,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:52,803 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-11-23 02:40:52,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:40:52,803 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-11-23 02:40:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 02:40:52,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:52,804 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:52,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:40:53,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:53,030 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:53,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:53,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1445844837, now seen corresponding path program 2 times [2021-11-23 02:40:53,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:53,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868142001] [2021-11-23 02:40:53,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:53,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:40:53,093 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:53,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868142001] [2021-11-23 02:40:53,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868142001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:40:53,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479306242] [2021-11-23 02:40:53,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:40:53,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:53,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:53,095 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:40:53,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:40:53,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:40:53,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:40:53,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:40:53,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:40:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:40:53,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:40:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:40:53,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479306242] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:40:53,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [798144837] [2021-11-23 02:40:53,307 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:40:53,307 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:40:53,307 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:40:53,308 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:40:53,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:40:53,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:53,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:53,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:53,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:53,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:53,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:53,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:53,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:53,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:53,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:54,099 INFO L354 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2021-11-23 02:40:54,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2021-11-23 02:40:54,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:54,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:54,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:54,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:54,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:54,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:54,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:54,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:54,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:54,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:55,138 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:40:55,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:40:55,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 02:40:55,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:55,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 52 [2021-11-23 02:40:55,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 02:40:55,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:55,453 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:55,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:55,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:55,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:55,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:55,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:55,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:55,551 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:40:55,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:40:55,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:55,614 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:55,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:55,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:55,673 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:55,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:55,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:55,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:55,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:55,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:55,759 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:40:55,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:40:55,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:55,823 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:55,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:55,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:55,879 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:40:55,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:40:55,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:55,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:56,014 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:40:56,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 74 [2021-11-23 02:40:56,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:56,104 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:56,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:56,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:56,156 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:40:56,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:40:56,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:56,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:56,263 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:40:56,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 74 [2021-11-23 02:40:56,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:56,369 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:56,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:56,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:56,416 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:40:56,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:40:56,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:56,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:56,538 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:40:56,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 74 [2021-11-23 02:40:56,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:56,639 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:56,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:56,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:56,692 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:40:56,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:40:56,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:56,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:56,830 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:40:56,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 74 [2021-11-23 02:40:56,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:56,922 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:56,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:56,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:56,966 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:56,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:57,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:57,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:57,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:57,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:57,055 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:40:57,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:40:57,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:57,131 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:57,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:57,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:57,178 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:40:57,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:40:57,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:57,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:57,277 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:40:57,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 74 [2021-11-23 02:40:57,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:57,360 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:57,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:57,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:57,408 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:40:57,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:40:57,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:57,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:57,528 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:40:57,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 64 [2021-11-23 02:40:57,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:57,621 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:57,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:40:57,662 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:40:58,209 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '731#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (<= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#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)))) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a6~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.offset|) (<= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.offset|) (<= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a7~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.offset|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#a4~0#1.offset|) (<= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2021-11-23 02:40:58,209 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:40:58,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:40:58,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 02:40:58,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866270929] [2021-11-23 02:40:58,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:40:58,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:40:58,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:58,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:40:58,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:40:58,212 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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) [2021-11-23 02:40:58,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:58,391 INFO L93 Difference]: Finished difference Result 77 states and 122 transitions. [2021-11-23 02:40:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:40:58,391 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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 27 [2021-11-23 02:40:58,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:58,392 INFO L225 Difference]: With dead ends: 77 [2021-11-23 02:40:58,393 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 02:40:58,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:40:58,394 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:58,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:40:58,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 02:40:58,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-23 02:40:58,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 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) [2021-11-23 02:40:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-11-23 02:40:58,403 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 27 [2021-11-23 02:40:58,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:58,403 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-11-23 02:40:58,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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) [2021-11-23 02:40:58,404 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-11-23 02:40:58,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:40:58,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:58,406 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:58,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:40:58,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:58,630 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:58,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:58,630 INFO L85 PathProgramCache]: Analyzing trace with hash -783944797, now seen corresponding path program 3 times [2021-11-23 02:40:58,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:58,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533209552] [2021-11-23 02:40:58,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:58,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:40:58,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:58,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533209552] [2021-11-23 02:40:58,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533209552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:40:58,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771598317] [2021-11-23 02:40:58,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:40:58,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:58,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:58,792 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:40:58,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:40:58,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:40:58,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:40:58,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:40:58,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:40:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:40:58,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:40:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:40:59,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771598317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:40:59,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1144200720] [2021-11-23 02:40:59,094 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:40:59,094 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:40:59,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:40:59,095 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:40:59,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:40:59,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,699 INFO L354 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2021-11-23 02:40:59,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2021-11-23 02:40:59,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:59,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:00,613 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:41:00,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:41:00,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 02:41:00,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:00,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 52 [2021-11-23 02:41:00,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 02:41:00,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:00,925 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:00,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:00,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:00,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:01,050 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:41:01,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 64 [2021-11-23 02:41:01,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:01,137 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:01,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:01,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:01,189 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:01,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:01,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:01,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:01,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:01,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:01,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:01,283 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:01,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:41:01,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:01,341 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:01,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:01,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:01,397 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:01,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:01,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:01,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:01,542 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:41:01,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 74 [2021-11-23 02:41:01,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:01,609 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:01,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:01,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:01,669 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:01,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:01,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:01,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:01,782 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:41:01,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 74 [2021-11-23 02:41:01,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:01,857 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:01,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:01,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:01,907 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:01,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:01,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:01,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,034 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:41:02,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 64 [2021-11-23 02:41:02,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,107 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:02,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:02,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,156 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:02,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:02,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:02,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:02,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:02,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,250 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:02,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:41:02,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,304 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:02,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:02,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,357 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:02,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:02,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:02,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:02,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,444 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:02,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:41:02,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,498 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:02,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:02,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,552 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:02,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:02,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,661 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:41:02,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 64 [2021-11-23 02:41:02,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,731 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:02,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:02,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,788 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:02,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:02,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,905 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:41:02,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 64 [2021-11-23 02:41:02,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:02,980 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:02,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:03,032 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:41:03,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1319#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (<= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#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)))) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a6~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.offset|) (<= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.offset|) (<= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a7~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.offset|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#a4~0#1.offset|) (<= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2021-11-23 02:41:03,534 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:41:03,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:41:03,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-23 02:41:03,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382326812] [2021-11-23 02:41:03,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:41:03,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:41:03,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:41:03,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:41:03,536 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 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) [2021-11-23 02:41:03,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:03,611 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2021-11-23 02:41:03,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:41:03,612 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 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 54 [2021-11-23 02:41:03,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:03,613 INFO L225 Difference]: With dead ends: 112 [2021-11-23 02:41:03,613 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 02:41:03,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:41:03,614 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:03,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:41:03,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 02:41:03,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-23 02:41:03,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 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) [2021-11-23 02:41:03,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-11-23 02:41:03,625 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 54 [2021-11-23 02:41:03,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:03,626 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-11-23 02:41:03,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 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) [2021-11-23 02:41:03,626 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-11-23 02:41:03,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 02:41:03,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:03,631 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:03,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:41:03,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:03,846 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:03,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:03,846 INFO L85 PathProgramCache]: Analyzing trace with hash 32937091, now seen corresponding path program 4 times [2021-11-23 02:41:03,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:03,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579786895] [2021-11-23 02:41:03,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:03,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:41:04,037 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:04,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579786895] [2021-11-23 02:41:04,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579786895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:41:04,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038060312] [2021-11-23 02:41:04,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:41:04,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:04,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:41:04,039 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:41:04,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:41:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:04,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:41:04,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:41:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:41:04,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:41:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:41:04,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038060312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:41:04,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1866814214] [2021-11-23 02:41:04,471 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:41:04,471 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:41:04,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:41:04,472 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:41:04,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:41:04,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:04,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:04,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:04,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:04,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:04,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:04,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:04,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:04,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:04,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:05,423 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:41:05,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:41:05,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:05,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:05,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:05,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:05,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:05,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:05,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:05,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:05,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:05,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:05,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2021-11-23 02:41:05,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:05,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:41:06,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:06,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:06,188 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:41:06,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 990 treesize of output 989 [2021-11-23 02:41:07,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 02:41:07,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:07,181 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:07,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:07,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:07,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:07,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:07,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:07,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:07,249 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:07,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 133 [2021-11-23 02:41:07,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:07,296 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:07,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:07,346 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:07,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:07,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:07,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:07,451 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:41:07,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 137 [2021-11-23 02:41:07,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:07,551 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:07,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:07,588 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:07,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:07,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:07,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:07,691 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:41:07,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 147 [2021-11-23 02:41:07,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:07,778 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:07,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:07,808 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:07,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:07,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:07,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:07,898 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:41:07,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 147 [2021-11-23 02:41:07,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:08,004 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:08,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:08,039 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:08,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:08,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:08,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:08,154 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:41:08,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 137 [2021-11-23 02:41:08,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:08,272 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:08,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:08,309 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:08,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:08,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:08,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:08,443 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:41:08,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 147 [2021-11-23 02:41:08,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:08,526 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:08,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:08,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:08,574 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:08,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:08,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:08,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:08,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:08,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:08,644 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:08,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 133 [2021-11-23 02:41:08,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:08,693 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:08,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:08,738 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:08,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:08,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:08,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:08,866 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:41:08,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 147 [2021-11-23 02:41:08,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:08,930 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:08,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:08,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:08,962 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:08,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:09,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:09,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:09,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:09,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:09,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:09,051 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:09,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 133 [2021-11-23 02:41:09,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:09,122 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:09,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:09,151 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:41:09,447 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2037#(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|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#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)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2021-11-23 02:41:09,447 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:41:09,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:41:09,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-23 02:41:09,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769184310] [2021-11-23 02:41:09,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:41:09,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:41:09,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:09,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:41:09,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:41:09,449 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 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) [2021-11-23 02:41:09,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:09,572 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2021-11-23 02:41:09,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 02:41:09,573 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 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 60 [2021-11-23 02:41:09,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:09,574 INFO L225 Difference]: With dead ends: 124 [2021-11-23 02:41:09,574 INFO L226 Difference]: Without dead ends: 74 [2021-11-23 02:41:09,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:41:09,576 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:09,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:41:09,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-23 02:41:09,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-23 02:41:09,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 73 states have internal predecessors, (84), 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) [2021-11-23 02:41:09,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-11-23 02:41:09,600 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 60 [2021-11-23 02:41:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:09,600 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-11-23 02:41:09,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 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) [2021-11-23 02:41:09,601 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-11-23 02:41:09,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 02:41:09,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:09,602 INFO L514 BasicCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:09,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:41:09,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:09,803 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:09,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:09,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1552506435, now seen corresponding path program 5 times [2021-11-23 02:41:09,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:09,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524123790] [2021-11-23 02:41:09,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:09,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:41:10,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:10,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524123790] [2021-11-23 02:41:10,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524123790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:41:10,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594895868] [2021-11-23 02:41:10,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:41:10,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:10,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:41:10,178 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:41:10,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:41:10,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:41:10,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:41:10,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:41:10,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:41:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-11-23 02:41:10,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:41:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-11-23 02:41:10,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594895868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:41:10,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [174876652] [2021-11-23 02:41:10,852 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:41:10,853 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:41:10,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:41:10,853 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:41:10,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:41:10,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:10,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:10,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:10,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:10,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:10,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:10,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:10,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:10,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:10,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:11,475 INFO L354 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2021-11-23 02:41:11,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2021-11-23 02:41:11,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:11,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:11,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:11,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:11,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:11,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:11,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:11,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:11,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:11,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:12,634 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:41:12,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:41:12,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 02:41:12,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:12,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 52 [2021-11-23 02:41:12,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 02:41:12,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:12,911 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:12,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:12,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:12,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,024 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:41:13,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 74 [2021-11-23 02:41:13,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,098 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:13,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:13,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,146 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:13,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:13,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,238 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:41:13,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 74 [2021-11-23 02:41:13,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,288 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:13,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:13,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,330 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:13,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:13,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,417 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:41:13,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 64 [2021-11-23 02:41:13,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,500 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:13,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:13,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,548 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:13,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:13,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,635 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:41:13,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 64 [2021-11-23 02:41:13,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,728 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:13,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:13,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,777 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:13,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:13,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:13,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:13,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,837 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:13,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:41:13,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,894 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:13,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:13,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:13,947 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:13,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:13,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:13,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:14,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:14,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:14,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:14,032 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:14,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:41:14,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:14,080 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:14,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:14,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:14,117 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:14,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:14,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:14,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:14,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:14,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:14,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:14,179 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:14,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:41:14,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:14,244 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:14,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:14,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:14,284 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:14,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:14,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:14,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:14,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:14,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:14,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:14,345 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:14,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:41:14,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:14,404 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:14,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:14,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:14,444 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:14,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:14,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:14,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:14,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:14,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:14,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:14,511 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:14,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:41:14,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:14,579 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:14,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:14,616 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:41:15,243 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2885#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (<= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#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)))) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a6~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.offset|) (<= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.offset|) (<= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a7~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.offset|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#a4~0#1.offset|) (<= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2021-11-23 02:41:15,243 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:41:15,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:41:15,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2021-11-23 02:41:15,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457365458] [2021-11-23 02:41:15,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:41:15,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 02:41:15,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:15,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 02:41:15,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 02:41:15,246 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 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) [2021-11-23 02:41:15,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:15,584 INFO L93 Difference]: Finished difference Result 179 states and 253 transitions. [2021-11-23 02:41:15,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 02:41:15,584 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 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 [2021-11-23 02:41:15,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:15,586 INFO L225 Difference]: With dead ends: 179 [2021-11-23 02:41:15,586 INFO L226 Difference]: Without dead ends: 129 [2021-11-23 02:41:15,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 02:41:15,588 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:15,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:41:15,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-23 02:41:15,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-23 02:41:15,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0859375) internal successors, (139), 128 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) [2021-11-23 02:41:15,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2021-11-23 02:41:15,611 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 72 [2021-11-23 02:41:15,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:15,612 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2021-11-23 02:41:15,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 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) [2021-11-23 02:41:15,612 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2021-11-23 02:41:15,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-23 02:41:15,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:15,614 INFO L514 BasicCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:15,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:41:15,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:15,846 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:15,846 INFO L85 PathProgramCache]: Analyzing trace with hash -690482320, now seen corresponding path program 6 times [2021-11-23 02:41:15,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:15,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349760716] [2021-11-23 02:41:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:15,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-23 02:41:16,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:16,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349760716] [2021-11-23 02:41:16,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349760716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:41:16,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979784191] [2021-11-23 02:41:16,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:41:16,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:16,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:41:16,267 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:41:16,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:41:16,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:41:16,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:41:16,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 02:41:16,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:41:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-23 02:41:16,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:41:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-23 02:41:17,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979784191] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:41:17,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [999810842] [2021-11-23 02:41:17,432 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:41:17,432 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:41:17,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:41:17,433 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:41:17,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:41:17,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:17,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:17,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:17,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:17,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:17,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:17,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:17,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:17,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:17,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:18,321 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:41:18,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:41:18,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:18,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:18,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:18,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:18,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:18,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:18,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:18,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:18,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:18,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:18,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2021-11-23 02:41:18,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:18,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:41:18,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:18,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:18,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:18,866 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:41:18,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1000 treesize of output 988 [2021-11-23 02:41:19,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 02:41:19,236 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:19,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:19,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:19,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:19,340 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:41:19,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 147 [2021-11-23 02:41:19,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:19,423 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:19,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:19,458 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:19,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:19,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:19,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:19,578 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:41:19,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 137 [2021-11-23 02:41:19,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:19,662 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:19,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:19,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:19,699 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:19,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:19,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:19,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:19,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:19,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:19,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:19,779 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:19,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 133 [2021-11-23 02:41:19,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:19,843 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:19,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:19,881 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:19,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:19,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:19,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:19,988 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:41:19,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 137 [2021-11-23 02:41:20,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,069 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:20,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:20,126 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:20,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:20,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,204 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:41:20,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 137 [2021-11-23 02:41:20,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,268 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:20,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:20,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,298 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:20,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:20,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:20,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:20,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:20,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,386 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:20,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 133 [2021-11-23 02:41:20,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,448 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:20,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:20,487 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:20,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:20,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,609 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:41:20,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 147 [2021-11-23 02:41:20,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,686 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:20,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:20,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,719 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:20,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:20,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:20,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:20,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:20,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,783 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:20,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 133 [2021-11-23 02:41:20,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,827 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:20,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:20,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,883 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:20,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:20,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:20,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:20,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:20,964 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:20,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 133 [2021-11-23 02:41:21,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:21,017 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:21,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:21,044 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:41:21,402 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4299#(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|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#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)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2021-11-23 02:41:21,402 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:41:21,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:41:21,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2021-11-23 02:41:21,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072775801] [2021-11-23 02:41:21,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:41:21,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 02:41:21,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:21,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 02:41:21,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 02:41:21,406 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 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) [2021-11-23 02:41:21,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:21,539 INFO L93 Difference]: Finished difference Result 258 states and 302 transitions. [2021-11-23 02:41:21,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 02:41:21,540 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 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 127 [2021-11-23 02:41:21,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:21,541 INFO L225 Difference]: With dead ends: 258 [2021-11-23 02:41:21,541 INFO L226 Difference]: Without dead ends: 154 [2021-11-23 02:41:21,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 02:41:21,544 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:21,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:41:21,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-23 02:41:21,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-11-23 02:41:21,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0718954248366013) internal successors, (164), 153 states have internal predecessors, (164), 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) [2021-11-23 02:41:21,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2021-11-23 02:41:21,557 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 127 [2021-11-23 02:41:21,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:21,558 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2021-11-23 02:41:21,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 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) [2021-11-23 02:41:21,558 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2021-11-23 02:41:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-23 02:41:21,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:21,561 INFO L514 BasicCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:21,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:41:21,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:21,786 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:21,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2108370781, now seen corresponding path program 7 times [2021-11-23 02:41:21,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:21,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430307394] [2021-11-23 02:41:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:21,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-23 02:41:23,019 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:23,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430307394] [2021-11-23 02:41:23,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430307394] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:41:23,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866792780] [2021-11-23 02:41:23,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:41:23,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:23,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:41:23,021 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:41:23,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:41:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:23,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 02:41:23,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:41:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-23 02:41:23,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:41:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-23 02:41:26,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866792780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:41:26,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [748416205] [2021-11-23 02:41:26,021 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:41:26,021 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:41:26,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:41:26,021 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:41:26,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:41:26,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,599 INFO L354 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2021-11-23 02:41:26,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2021-11-23 02:41:26,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:26,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:27,627 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:41:27,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:41:27,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 02:41:27,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:27,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 52 [2021-11-23 02:41:27,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 02:41:27,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:27,859 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:27,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:27,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:27,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:27,970 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:41:27,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 64 [2021-11-23 02:41:28,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,030 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:28,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:28,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,069 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:28,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:28,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:28,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:28,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,124 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:28,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:41:28,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,167 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:28,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:28,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,208 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:28,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:28,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:28,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:28,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:28,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,266 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:28,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:41:28,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,301 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:28,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:28,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,344 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:28,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:28,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,463 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:41:28,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 74 [2021-11-23 02:41:28,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,530 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:28,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:28,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,569 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:28,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:28,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:28,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:28,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,665 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:28,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:41:28,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,749 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:28,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:28,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,793 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:28,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:28,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:28,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:28,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:28,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,848 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:28,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:41:28,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,904 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:28,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:28,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:28,956 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:28,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:29,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:29,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:29,057 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:41:29,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 64 [2021-11-23 02:41:29,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:29,128 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:29,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:29,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:29,177 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:29,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:29,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:29,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:29,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:29,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:29,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:29,241 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:41:29,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:41:29,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:29,283 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:29,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:29,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:29,316 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:41:29,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:41:29,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:29,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:29,425 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:41:29,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 64 [2021-11-23 02:41:29,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:41:29,484 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:41:29,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:41:29,541 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:41:30,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6121#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (<= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#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)))) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a6~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.offset|) (<= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.offset|) (<= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a7~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.offset|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#a4~0#1.offset|) (<= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2021-11-23 02:41:30,164 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:41:30,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:41:30,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2021-11-23 02:41:30,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834614470] [2021-11-23 02:41:30,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:41:30,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-23 02:41:30,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:30,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-23 02:41:30,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2021-11-23 02:41:30,171 INFO L87 Difference]: Start difference. First operand 154 states and 164 transitions. Second operand has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 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) [2021-11-23 02:41:30,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:30,418 INFO L93 Difference]: Finished difference Result 308 states and 377 transitions. [2021-11-23 02:41:30,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-23 02:41:30,418 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 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 152 [2021-11-23 02:41:30,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:30,420 INFO L225 Difference]: With dead ends: 308 [2021-11-23 02:41:30,420 INFO L226 Difference]: Without dead ends: 204 [2021-11-23 02:41:30,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2021-11-23 02:41:30,425 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:30,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:41:30,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-23 02:41:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-11-23 02:41:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 203 states have internal predecessors, (214), 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) [2021-11-23 02:41:30,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 214 transitions. [2021-11-23 02:41:30,439 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 214 transitions. Word has length 152 [2021-11-23 02:41:30,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:30,440 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 214 transitions. [2021-11-23 02:41:30,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 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) [2021-11-23 02:41:30,440 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 214 transitions. [2021-11-23 02:41:30,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-23 02:41:30,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:30,444 INFO L514 BasicCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:30,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:41:30,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:30,658 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:30,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:30,658 INFO L85 PathProgramCache]: Analyzing trace with hash -919818941, now seen corresponding path program 8 times [2021-11-23 02:41:30,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:30,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609798802] [2021-11-23 02:41:30,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:30,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-23 02:41:34,357 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:34,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609798802] [2021-11-23 02:41:34,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609798802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:41:34,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642940073] [2021-11-23 02:41:34,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:41:34,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:34,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:41:34,369 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:41:34,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:42:24,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 02:42:24,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:42:24,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:42:24,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5291 trivial. 0 not checked. [2021-11-23 02:42:24,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:42:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5291 trivial. 0 not checked. [2021-11-23 02:42:25,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642940073] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:42:25,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1709151937] [2021-11-23 02:42:25,440 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:42:25,441 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:25,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:25,441 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:25,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:25,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:25,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:25,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:25,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:25,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:25,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:25,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:25,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:25,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:25,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:26,391 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:42:26,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:42:26,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:26,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:26,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:26,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:26,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:26,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:26,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:26,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:26,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:26,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:26,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2021-11-23 02:42:26,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:26,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:42:26,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:26,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:26,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:26,950 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:42:26,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1000 treesize of output 988 [2021-11-23 02:42:27,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 02:42:27,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:27,234 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:27,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:27,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:27,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:27,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:27,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:27,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:27,290 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:42:27,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 133 [2021-11-23 02:42:27,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:27,334 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:27,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:27,366 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:42:27,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:42:27,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:27,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:27,437 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:42:27,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 137 [2021-11-23 02:42:27,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:27,497 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:27,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:27,526 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:42:27,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:42:27,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:27,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:27,608 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:42:27,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 137 [2021-11-23 02:42:27,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:27,675 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:27,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:27,705 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:42:27,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:42:27,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:27,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:27,783 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:42:27,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 147 [2021-11-23 02:42:27,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:27,864 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:27,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:27,891 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:42:27,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:42:27,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:27,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:27,979 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:42:27,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 137 [2021-11-23 02:42:28,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:28,035 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:28,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:28,066 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:42:28,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:42:28,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:28,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:28,159 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:42:28,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 137 [2021-11-23 02:42:28,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:28,235 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:28,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:28,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:28,262 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:28,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:28,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:28,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:28,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:28,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:28,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:28,320 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:42:28,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 133 [2021-11-23 02:42:28,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:28,365 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:28,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:28,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:28,417 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:28,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:28,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:28,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:28,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:28,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:28,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:28,495 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:42:28,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 133 [2021-11-23 02:42:28,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:28,549 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:28,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:28,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:28,586 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:28,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:28,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:28,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:28,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:28,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:28,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:28,662 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:42:28,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 133 [2021-11-23 02:42:28,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:28,717 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:28,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:28,751 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:42:29,429 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8465#(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|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#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)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2021-11-23 02:42:29,429 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:42:29,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:42:29,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2021-11-23 02:42:29,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041687606] [2021-11-23 02:42:29,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:42:29,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-23 02:42:29,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:29,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-23 02:42:29,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2021-11-23 02:42:29,436 INFO L87 Difference]: Start difference. First operand 204 states and 214 transitions. Second operand has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 states have internal predecessors, (163), 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) [2021-11-23 02:42:30,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:30,133 INFO L93 Difference]: Finished difference Result 417 states and 545 transitions. [2021-11-23 02:42:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-23 02:42:30,134 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 states have internal predecessors, (163), 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 202 [2021-11-23 02:42:30,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:30,136 INFO L225 Difference]: With dead ends: 417 [2021-11-23 02:42:30,136 INFO L226 Difference]: Without dead ends: 313 [2021-11-23 02:42:30,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2021-11-23 02:42:30,141 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:30,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:42:30,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-23 02:42:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2021-11-23 02:42:30,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.0352564102564104) internal successors, (323), 312 states have internal predecessors, (323), 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) [2021-11-23 02:42:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 323 transitions. [2021-11-23 02:42:30,158 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 323 transitions. Word has length 202 [2021-11-23 02:42:30,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:30,159 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 323 transitions. [2021-11-23 02:42:30,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 states have internal predecessors, (163), 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) [2021-11-23 02:42:30,160 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 323 transitions. [2021-11-23 02:42:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-23 02:42:30,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:30,166 INFO L514 BasicCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:30,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:42:30,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:30,382 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:30,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:30,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2031454384, now seen corresponding path program 9 times [2021-11-23 02:42:30,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:30,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013352680] [2021-11-23 02:42:30,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:30,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2021-11-23 02:42:34,269 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:34,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013352680] [2021-11-23 02:42:34,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013352680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:42:34,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262489938] [2021-11-23 02:42:34,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:42:34,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:34,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:34,272 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:34,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:42:34,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:42:34,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:42:34,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 1513 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-23 02:42:34,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2021-11-23 02:42:34,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:42:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2021-11-23 02:42:45,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262489938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:42:45,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [775332928] [2021-11-23 02:42:45,094 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:42:45,094 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:45,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:45,094 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:45,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:45,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,641 INFO L354 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2021-11-23 02:42:45,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2021-11-23 02:42:45,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:46,477 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:42:46,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:42:46,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 02:42:46,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:46,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 52 [2021-11-23 02:42:46,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 02:42:46,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:46,698 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:46,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:46,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:46,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:46,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:46,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:46,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:46,785 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:42:46,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:42:46,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:46,837 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:46,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:46,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:46,885 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:46,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:46,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:46,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:46,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:46,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:46,963 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:42:46,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:42:47,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,014 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:47,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:47,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,066 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:47,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:47,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:47,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:47,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:47,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,137 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:42:47,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:42:47,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,178 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:47,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:47,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,223 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:47,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:47,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:47,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:47,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:47,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,278 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:42:47,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:42:47,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,314 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:47,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:47,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,352 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:42:47,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:42:47,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,438 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:42:47,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 64 [2021-11-23 02:42:47,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,520 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:47,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:47,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,563 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:42:47,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:42:47,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,649 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:42:47,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 74 [2021-11-23 02:42:47,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,727 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:47,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:47,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,773 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:47,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:47,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:47,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:47,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,842 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:42:47,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:42:47,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,877 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:47,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:47,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,922 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:42:47,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:42:47,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:47,997 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:42:47,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 74 [2021-11-23 02:42:48,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:48,068 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:48,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:48,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:48,105 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:48,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:48,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:48,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:48,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:48,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:48,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:48,158 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:42:48,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:42:48,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:48,204 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:48,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:42:48,239 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:42:49,120 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11979#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (<= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#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)))) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a6~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.offset|) (<= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.offset|) (<= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a7~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.offset|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#a4~0#1.offset|) (<= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2021-11-23 02:42:49,121 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:42:49,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:42:49,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2021-11-23 02:42:49,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529021451] [2021-11-23 02:42:49,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:42:49,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-11-23 02:42:49,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:49,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-11-23 02:42:49,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2021-11-23 02:42:49,131 INFO L87 Difference]: Start difference. First operand 313 states and 323 transitions. Second operand has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 states have internal predecessors, (225), 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) [2021-11-23 02:42:49,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:49,567 INFO L93 Difference]: Finished difference Result 626 states and 746 transitions. [2021-11-23 02:42:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-11-23 02:42:49,567 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 states have internal predecessors, (225), 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 311 [2021-11-23 02:42:49,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:49,570 INFO L225 Difference]: With dead ends: 626 [2021-11-23 02:42:49,570 INFO L226 Difference]: Without dead ends: 414 [2021-11-23 02:42:49,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1032 GetRequests, 826 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2021-11-23 02:42:49,575 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:49,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:42:49,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-23 02:42:49,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2021-11-23 02:42:49,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.026634382566586) internal successors, (424), 413 states have internal predecessors, (424), 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) [2021-11-23 02:42:49,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 424 transitions. [2021-11-23 02:42:49,592 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 424 transitions. Word has length 311 [2021-11-23 02:42:49,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:49,593 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 424 transitions. [2021-11-23 02:42:49,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 states have internal predecessors, (225), 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) [2021-11-23 02:42:49,594 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 424 transitions. [2021-11-23 02:42:49,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2021-11-23 02:42:49,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:49,603 INFO L514 BasicCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:49,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:42:49,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:49,830 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:49,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:49,830 INFO L85 PathProgramCache]: Analyzing trace with hash 942571171, now seen corresponding path program 10 times [2021-11-23 02:42:49,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:49,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392277942] [2021-11-23 02:42:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:49,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2021-11-23 02:43:03,523 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:03,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392277942] [2021-11-23 02:43:03,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392277942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:43:03,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577620265] [2021-11-23 02:43:03,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:43:03,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:43:03,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:43:03,528 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:43:03,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:43:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:03,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 2119 conjuncts, 202 conjunts are in the unsatisfiable core [2021-11-23 02:43:03,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:43:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2021-11-23 02:43:04,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:43:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2021-11-23 02:43:43,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577620265] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:43:43,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [38487570] [2021-11-23 02:43:43,906 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:43:43,906 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:43:43,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:43:43,906 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:43:43,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:43:43,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:43,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:43,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:43,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:43,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:43,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:43,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:43,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:43,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:43,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:44,491 INFO L354 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2021-11-23 02:43:44,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2021-11-23 02:43:44,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:44,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:44,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:44,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:44,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:44,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:44,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:44,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:44,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:44,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:45,345 INFO L354 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2021-11-23 02:43:45,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2021-11-23 02:43:45,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 02:43:45,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:45,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 52 [2021-11-23 02:43:45,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 02:43:45,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:45,529 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:43:45,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:43:45,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:45,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:45,609 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:43:45,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 74 [2021-11-23 02:43:45,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:45,698 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:45,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:43:45,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:45,747 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:45,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:43:45,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:45,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:45,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:45,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:45,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:45,800 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:43:45,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:43:45,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:45,844 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:45,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:43:45,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:45,878 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:45,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:43:45,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:45,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:45,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:45,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:45,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:45,937 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:43:45,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:43:45,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:45,977 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:45,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:43:46,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,018 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:46,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:43:46,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:46,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:46,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:46,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,085 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:43:46,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:43:46,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,126 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:46,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:43:46,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,170 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:46,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:43:46,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:46,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:46,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,225 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:43:46,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:43:46,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,266 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:46,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:43:46,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,306 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:46,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:43:46,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:46,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:46,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:46,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,362 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:43:46,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:43:46,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,406 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:46,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:43:46,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,442 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:46,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:43:46,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:46,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:46,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:46,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,502 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:43:46,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 60 [2021-11-23 02:43:46,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,542 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:46,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:43:46,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,581 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:43:46,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:43:46,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,676 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:43:46,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 64 [2021-11-23 02:43:46,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,725 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:46,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:43:46,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,764 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:43:46,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:43:46,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,879 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:43:46,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 74 [2021-11-23 02:43:46,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:43:46,935 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:43:46,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:43:46,968 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:43:48,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16921#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (<= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#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)))) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a6~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.offset|) (<= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.offset|) (<= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a7~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.offset|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#a4~0#1.offset|) (<= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (<= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2021-11-23 02:43:48,263 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:43:48,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:43:48,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2021-11-23 02:43:48,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081452856] [2021-11-23 02:43:48,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:43:48,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2021-11-23 02:43:48,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:48,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2021-11-23 02:43:48,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2021-11-23 02:43:48,280 INFO L87 Difference]: Start difference. First operand 414 states and 424 transitions. Second operand has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 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) [2021-11-23 02:43:50,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:50,229 INFO L93 Difference]: Finished difference Result 828 states and 1049 transitions. [2021-11-23 02:43:50,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2021-11-23 02:43:50,230 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 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 412 [2021-11-23 02:43:50,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:50,232 INFO L225 Difference]: With dead ends: 828 [2021-11-23 02:43:50,233 INFO L226 Difference]: Without dead ends: 616 [2021-11-23 02:43:50,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1436 GetRequests, 1028 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 52.7s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2021-11-23 02:43:50,239 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:50,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:43:50,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-11-23 02:43:50,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2021-11-23 02:43:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 1.0178861788617886) internal successors, (626), 615 states have internal predecessors, (626), 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) [2021-11-23 02:43:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 626 transitions. [2021-11-23 02:43:50,264 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 626 transitions. Word has length 412 [2021-11-23 02:43:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:50,265 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 626 transitions. [2021-11-23 02:43:50,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 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) [2021-11-23 02:43:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 626 transitions. [2021-11-23 02:43:50,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2021-11-23 02:43:50,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:50,271 INFO L514 BasicCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:43:50,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:43:50,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 02:43:50,478 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:50,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:50,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1858173245, now seen corresponding path program 11 times [2021-11-23 02:43:50,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:50,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165109016] [2021-11-23 02:43:50,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:50,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 83280 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2021-11-23 02:44:44,819 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:44,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165109016] [2021-11-23 02:44:44,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165109016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:44,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534231213] [2021-11-23 02:44:44,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:44:44,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:44,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:44,830 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:44,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d79188-6f80-4668-80b1-649873ebaa29/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process