./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0219.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0219.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4a489d3e73f8fa53a32414f65b592ba5db703c103e5e16e188592c7c2dfeab95 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:32:35,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:32:35,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:32:35,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:32:35,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:32:35,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:32:35,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:32:35,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:32:35,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:32:35,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:32:35,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:32:35,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:32:35,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:32:35,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:32:35,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:32:35,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:32:35,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:32:35,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:32:35,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:32:35,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:32:35,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:32:35,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:32:35,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:32:35,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:32:35,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:32:35,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:32:35,713 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:32:35,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:32:35,716 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:32:35,718 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:32:35,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:32:35,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:32:35,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:32:35,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:32:35,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:32:35,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:32:35,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:32:35,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:32:35,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:32:35,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:32:35,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:32:35,731 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 01:32:35,784 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:32:35,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:32:35,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:32:35,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:32:35,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:32:35,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:32:35,786 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:32:35,787 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:32:35,787 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:32:35,787 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:32:35,787 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:32:35,788 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:32:35,788 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:32:35,788 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:32:35,788 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:32:35,789 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:32:35,794 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:32:35,795 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:32:35,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:32:35,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:32:35,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:32:35,796 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:32:35,796 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:32:35,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:32:35,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:32:35,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:32:35,800 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:32:35,800 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:32:35,801 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:32:35,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:32:35,802 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:32:35,802 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:32:35,802 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:32:35,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:32:35,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:32:35,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:32:35,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:32:35,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:32:35,805 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:32:35,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:32:35,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:32:35,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:32:35,805 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_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a489d3e73f8fa53a32414f65b592ba5db703c103e5e16e188592c7c2dfeab95 [2021-11-21 01:32:36,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:32:36,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:32:36,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:32:36,176 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:32:36,177 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:32:36,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/memsafety/test-0219.i [2021-11-21 01:32:36,287 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/data/1c4fe37d8/5d936c6ef54d4a6e835d1bcb86540f8e/FLAGb68c90c14 [2021-11-21 01:32:36,965 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:32:36,965 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/sv-benchmarks/c/memsafety/test-0219.i [2021-11-21 01:32:37,003 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/data/1c4fe37d8/5d936c6ef54d4a6e835d1bcb86540f8e/FLAGb68c90c14 [2021-11-21 01:32:37,185 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/data/1c4fe37d8/5d936c6ef54d4a6e835d1bcb86540f8e [2021-11-21 01:32:37,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:32:37,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:32:37,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:32:37,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:32:37,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:32:37,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:32:37" (1/1) ... [2021-11-21 01:32:37,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@146e1e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:37, skipping insertion in model container [2021-11-21 01:32:37,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:32:37" (1/1) ... [2021-11-21 01:32:37,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:32:37,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:32:37,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:32:37,752 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:32:37,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:32:37,851 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:32:37,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:37 WrapperNode [2021-11-21 01:32:37,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:32:37,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:32:37,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:32:37,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:32:37,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:37" (1/1) ... [2021-11-21 01:32:37,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:37" (1/1) ... [2021-11-21 01:32:37,914 INFO L137 Inliner]: procedures = 180, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 113 [2021-11-21 01:32:37,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:32:37,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:32:37,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:32:37,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:32:37,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:37" (1/1) ... [2021-11-21 01:32:37,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:37" (1/1) ... [2021-11-21 01:32:37,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:37" (1/1) ... [2021-11-21 01:32:37,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:37" (1/1) ... [2021-11-21 01:32:37,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:37" (1/1) ... [2021-11-21 01:32:37,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:37" (1/1) ... [2021-11-21 01:32:37,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:37" (1/1) ... [2021-11-21 01:32:37,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:32:37,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:32:37,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:32:37,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:32:37,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:37" (1/1) ... [2021-11-21 01:32:37,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:32:37,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:38,019 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:32:38,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:32:38,077 INFO L130 BoogieDeclarations]: Found specification of procedure calloc_model [2021-11-21 01:32:38,079 INFO L138 BoogieDeclarations]: Found implementation of procedure calloc_model [2021-11-21 01:32:38,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:32:38,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:32:38,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:32:38,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:32:38,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:32:38,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:32:38,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:32:38,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:32:38,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:32:38,238 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:32:38,240 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:32:38,699 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:32:38,782 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:32:38,786 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-21 01:32:38,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:32:38 BoogieIcfgContainer [2021-11-21 01:32:38,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:32:38,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:32:38,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:32:38,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:32:38,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:32:37" (1/3) ... [2021-11-21 01:32:38,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f21ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:32:38, skipping insertion in model container [2021-11-21 01:32:38,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:37" (2/3) ... [2021-11-21 01:32:38,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f21ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:32:38, skipping insertion in model container [2021-11-21 01:32:38,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:32:38" (3/3) ... [2021-11-21 01:32:38,799 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0219.i [2021-11-21 01:32:38,810 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:32:38,810 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2021-11-21 01:32:38,866 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:32:38,873 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-21 01:32:38,874 INFO L340 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2021-11-21 01:32:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 41 states have (on average 2.341463414634146) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:32:38,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-21 01:32:38,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:38,899 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-21 01:32:38,900 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:32:38,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:38,905 INFO L85 PathProgramCache]: Analyzing trace with hash 205400, now seen corresponding path program 1 times [2021-11-21 01:32:38,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:38,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283240931] [2021-11-21 01:32:38,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:38,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:32:39,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:39,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283240931] [2021-11-21 01:32:39,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283240931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:39,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:39,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:32:39,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466377178] [2021-11-21 01:32:39,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:39,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:32:39,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:39,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:32:39,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:32:39,106 INFO L87 Difference]: Start difference. First operand has 91 states, 41 states have (on average 2.341463414634146) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2021-11-21 01:32:39,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:39,177 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2021-11-21 01:32:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:32:39,180 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2021-11-21 01:32:39,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:39,191 INFO L225 Difference]: With dead ends: 91 [2021-11-21 01:32:39,192 INFO L226 Difference]: Without dead ends: 90 [2021-11-21 01:32:39,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:32:39,203 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:39,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:32:39,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-21 01:32:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-21 01:32:39,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 86 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:32:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2021-11-21 01:32:39,265 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 3 [2021-11-21 01:32:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:39,266 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2021-11-21 01:32:39,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2021-11-21 01:32:39,267 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2021-11-21 01:32:39,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 01:32:39,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:39,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 01:32:39,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:32:39,268 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting calloc_modelErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:32:39,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:39,273 INFO L85 PathProgramCache]: Analyzing trace with hash 195213019, now seen corresponding path program 1 times [2021-11-21 01:32:39,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:39,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422697045] [2021-11-21 01:32:39,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:39,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:39,312 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:32:39,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126775331] [2021-11-21 01:32:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:39,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:39,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:39,326 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:39,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:32:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:39,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:32:39,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:39,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:32:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:32:39,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:32:39,538 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:39,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422697045] [2021-11-21 01:32:39,539 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:32:39,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126775331] [2021-11-21 01:32:39,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126775331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:39,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:39,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:32:39,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009748007] [2021-11-21 01:32:39,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:39,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:32:39,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:39,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:32:39,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:32:39,543 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:39,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:39,664 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-11-21 01:32:39,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:32:39,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-21 01:32:39,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:39,667 INFO L225 Difference]: With dead ends: 89 [2021-11-21 01:32:39,668 INFO L226 Difference]: Without dead ends: 89 [2021-11-21 01:32:39,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:32:39,670 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 5 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:39,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 119 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:32:39,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-21 01:32:39,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-21 01:32:39,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 85 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:32:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2021-11-21 01:32:39,688 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 5 [2021-11-21 01:32:39,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:39,688 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2021-11-21 01:32:39,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:39,689 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2021-11-21 01:32:39,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:32:39,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:39,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:32:39,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:39,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:39,908 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting calloc_modelErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:32:39,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:39,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1756636486, now seen corresponding path program 1 times [2021-11-21 01:32:39,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:39,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682167366] [2021-11-21 01:32:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:39,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:39,925 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:32:39,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249847300] [2021-11-21 01:32:39,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:39,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:39,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:39,927 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:39,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:32:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:40,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:32:40,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:40,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-11-21 01:32:40,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:32:40,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:32:40,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:40,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682167366] [2021-11-21 01:32:40,225 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:32:40,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249847300] [2021-11-21 01:32:40,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249847300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:40,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:40,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:32:40,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129792528] [2021-11-21 01:32:40,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:40,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:32:40,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:40,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:32:40,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:32:40,228 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:40,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:40,255 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2021-11-21 01:32:40,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:32:40,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 01:32:40,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:40,257 INFO L225 Difference]: With dead ends: 88 [2021-11-21 01:32:40,257 INFO L226 Difference]: Without dead ends: 88 [2021-11-21 01:32:40,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:32:40,259 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:40,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 129 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2021-11-21 01:32:40,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-21 01:32:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-21 01:32:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 84 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:32:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2021-11-21 01:32:40,270 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 6 [2021-11-21 01:32:40,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:40,270 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2021-11-21 01:32:40,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:40,270 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2021-11-21 01:32:40,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:32:40,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:40,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:40,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:40,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-21 01:32:40,497 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:32:40,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:40,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1433965814, now seen corresponding path program 1 times [2021-11-21 01:32:40,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:40,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793921195] [2021-11-21 01:32:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:40,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:40,534 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:32:40,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252070387] [2021-11-21 01:32:40,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:40,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:40,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:40,540 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:40,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:32:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:40,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:32:40,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:40,764 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:32:40,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 01:32:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:32:40,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:32:40,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:40,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793921195] [2021-11-21 01:32:40,800 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:32:40,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252070387] [2021-11-21 01:32:40,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252070387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:40,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:40,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:32:40,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394138047] [2021-11-21 01:32:40,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:40,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:32:40,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:40,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:32:40,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:32:40,806 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:32:41,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:41,010 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2021-11-21 01:32:41,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:32:41,011 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-21 01:32:41,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:41,017 INFO L225 Difference]: With dead ends: 87 [2021-11-21 01:32:41,017 INFO L226 Difference]: Without dead ends: 87 [2021-11-21 01:32:41,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:32:41,024 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 6 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:41,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 309 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2021-11-21 01:32:41,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-21 01:32:41,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-21 01:32:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 83 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:32:41,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2021-11-21 01:32:41,048 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 18 [2021-11-21 01:32:41,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:41,055 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2021-11-21 01:32:41,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:32:41,056 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2021-11-21 01:32:41,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:32:41,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:41,057 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:41,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:41,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:41,282 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:32:41,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:41,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1433965813, now seen corresponding path program 1 times [2021-11-21 01:32:41,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:41,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836393535] [2021-11-21 01:32:41,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:41,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:41,297 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:32:41,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922603635] [2021-11-21 01:32:41,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:41,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:41,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:41,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:41,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:32:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:41,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-21 01:32:41,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:41,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:32:41,720 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:32:41,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2021-11-21 01:32:41,738 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:32:41,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-11-21 01:32:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:32:41,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:32:42,377 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:32:42,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-21 01:32:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:32:42,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:42,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836393535] [2021-11-21 01:32:42,527 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:32:42,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922603635] [2021-11-21 01:32:42,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922603635] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:32:42,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:32:42,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2021-11-21 01:32:42,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920444229] [2021-11-21 01:32:42,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:42,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:32:42,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:42,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:32:42,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:32:42,530 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:32:42,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:42,631 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2021-11-21 01:32:42,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:32:42,632 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-21 01:32:42,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:42,637 INFO L225 Difference]: With dead ends: 88 [2021-11-21 01:32:42,637 INFO L226 Difference]: Without dead ends: 88 [2021-11-21 01:32:42,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:32:42,640 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 78 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:42,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 178 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 230 Unchecked, 0.1s Time] [2021-11-21 01:32:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-21 01:32:42,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2021-11-21 01:32:42,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 41 states have (on average 2.097560975609756) internal successors, (86), 81 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:32:42,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2021-11-21 01:32:42,670 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 18 [2021-11-21 01:32:42,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:42,673 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2021-11-21 01:32:42,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:32:42,673 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2021-11-21 01:32:42,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:32:42,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:42,677 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:42,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:42,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:42,883 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:32:42,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:42,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1503262592, now seen corresponding path program 1 times [2021-11-21 01:32:42,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:42,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613739138] [2021-11-21 01:32:42,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:42,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:42,898 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:32:42,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601046423] [2021-11-21 01:32:42,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:42,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:42,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:42,900 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:42,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:32:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:42,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:32:42,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:32:43,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:32:43,053 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:43,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613739138] [2021-11-21 01:32:43,053 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:32:43,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601046423] [2021-11-21 01:32:43,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601046423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:43,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:43,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:32:43,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217737169] [2021-11-21 01:32:43,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:43,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:32:43,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:43,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:32:43,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:32:43,056 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:32:43,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:43,165 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2021-11-21 01:32:43,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:32:43,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-21 01:32:43,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:43,167 INFO L225 Difference]: With dead ends: 110 [2021-11-21 01:32:43,167 INFO L226 Difference]: Without dead ends: 110 [2021-11-21 01:32:43,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:32:43,170 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 46 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:43,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 92 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:32:43,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-21 01:32:43,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 83. [2021-11-21 01:32:43,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 41 states have (on average 2.048780487804878) internal successors, (84), 79 states have internal predecessors, (84), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:32:43,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2021-11-21 01:32:43,190 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 19 [2021-11-21 01:32:43,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:43,191 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2021-11-21 01:32:43,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:32:43,191 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2021-11-21 01:32:43,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 01:32:43,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:43,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:43,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 01:32:43,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:43,421 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:32:43,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:43,422 INFO L85 PathProgramCache]: Analyzing trace with hash 643504998, now seen corresponding path program 1 times [2021-11-21 01:32:43,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:43,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100860658] [2021-11-21 01:32:43,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:43,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:43,431 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:32:43,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609207716] [2021-11-21 01:32:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:43,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:43,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:43,444 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:43,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:32:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:43,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:32:43,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:43,726 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:32:43,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-21 01:32:43,760 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:32:43,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-21 01:32:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:32:43,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:32:44,067 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:32:44,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-11-21 01:32:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:32:44,084 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:44,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100860658] [2021-11-21 01:32:44,085 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:32:44,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609207716] [2021-11-21 01:32:44,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609207716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:32:44,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1208203023] [2021-11-21 01:32:44,111 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 01:32:44,111 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:32:44,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:32:44,128 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:32:44,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:32:44,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:32:44,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:32:44,917 INFO L197 IcfgInterpreter]: Interpreting procedure calloc_model with input of size 63 for LOIs [2021-11-21 01:32:45,648 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:32:46,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1208203023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:46,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:32:46,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 9] total 18 [2021-11-21 01:32:46,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927476810] [2021-11-21 01:32:46,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:46,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:32:46,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:46,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:32:46,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:32:46,240 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:32:46,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:46,829 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2021-11-21 01:32:46,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:32:46,829 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-11-21 01:32:46,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:46,830 INFO L225 Difference]: With dead ends: 89 [2021-11-21 01:32:46,830 INFO L226 Difference]: Without dead ends: 89 [2021-11-21 01:32:46,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:32:46,832 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 2 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:46,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 163 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:32:46,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-21 01:32:46,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-21 01:32:46,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 46 states have (on average 1.934782608695652) internal successors, (89), 84 states have internal predecessors, (89), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:32:46,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2021-11-21 01:32:46,839 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 20 [2021-11-21 01:32:46,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:46,839 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2021-11-21 01:32:46,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:32:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2021-11-21 01:32:46,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:32:46,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:46,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:46,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:47,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 01:32:47,045 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:32:47,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:47,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1105547935, now seen corresponding path program 1 times [2021-11-21 01:32:47,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:47,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362050010] [2021-11-21 01:32:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:47,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:47,058 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:32:47,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022769150] [2021-11-21 01:32:47,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:47,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:47,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:47,068 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:47,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:32:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:47,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:32:47,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:47,316 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:32:47,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-21 01:32:47,344 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:32:47,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-21 01:32:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:32:47,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:32:47,620 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:32:47,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-11-21 01:32:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:32:47,629 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:47,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362050010] [2021-11-21 01:32:47,629 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:32:47,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022769150] [2021-11-21 01:32:47,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022769150] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:32:47,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1246717419] [2021-11-21 01:32:47,633 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 01:32:47,633 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:32:47,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:32:47,634 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:32:47,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:32:47,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:32:47,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:32:47,983 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 13 treesize of output 9 [2021-11-21 01:32:48,006 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 11 treesize of output 7 [2021-11-21 01:32:48,051 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 11 treesize of output 7 [2021-11-21 01:32:48,169 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-21 01:32:48,170 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 170 treesize of output 173 [2021-11-21 01:32:48,209 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 01:32:48,210 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 173 treesize of output 176 [2021-11-21 01:32:48,243 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 01:32:48,244 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 176 treesize of output 179 [2021-11-21 01:32:48,853 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 14 treesize of output 10 [2021-11-21 01:32:48,878 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 14 treesize of output 10 [2021-11-21 01:32:48,893 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 16 treesize of output 12 [2021-11-21 01:32:48,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:32:49,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:32:49,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:32:49,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:32:49,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:32:50,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:32:50,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:32:50,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:32:50,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-21 01:32:50,817 INFO L197 IcfgInterpreter]: Interpreting procedure calloc_model with input of size 79 for LOIs [2021-11-21 01:32:53,713 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 16 treesize of output 12 [2021-11-21 01:32:53,740 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 14 treesize of output 10 [2021-11-21 01:32:53,812 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 14 treesize of output 10 [2021-11-21 01:32:54,075 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:32:55,557 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:32:55,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:32:55,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-11-21 01:32:55,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617424890] [2021-11-21 01:32:55,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:32:55,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:32:55,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:55,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:32:55,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-11-21 01:32:55,561 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:32:55,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:55,952 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2021-11-21 01:32:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:32:55,953 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-11-21 01:32:55,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:55,954 INFO L225 Difference]: With dead ends: 116 [2021-11-21 01:32:55,954 INFO L226 Difference]: Without dead ends: 116 [2021-11-21 01:32:55,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:32:55,956 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 99 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:55,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 334 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 324 Invalid, 0 Unknown, 67 Unchecked, 0.3s Time] [2021-11-21 01:32:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-21 01:32:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 91. [2021-11-21 01:32:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.82) internal successors, (91), 85 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:32:55,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2021-11-21 01:32:55,967 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 21 [2021-11-21 01:32:55,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:55,967 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2021-11-21 01:32:55,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:32:55,968 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2021-11-21 01:32:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:32:55,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:55,969 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:56,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:56,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:56,170 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:32:56,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:56,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1105547936, now seen corresponding path program 1 times [2021-11-21 01:32:56,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:56,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254475636] [2021-11-21 01:32:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:56,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:56,195 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:32:56,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482182406] [2021-11-21 01:32:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:56,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:56,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:56,209 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:56,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:32:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:56,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-21 01:32:56,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:56,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-21 01:32:56,904 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-21 01:32:56,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-11-21 01:32:56,926 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:32:56,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-11-21 01:32:57,015 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 01:32:57,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-21 01:32:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:32:57,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:32:57,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:57,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254475636] [2021-11-21 01:32:57,340 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:32:57,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482182406] [2021-11-21 01:32:57,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482182406] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:32:57,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [132238917] [2021-11-21 01:32:57,344 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 01:32:57,344 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:32:57,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:32:57,344 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:32:57,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:32:57,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:32:57,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:32:57,795 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 14 treesize of output 10 [2021-11-21 01:32:57,842 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 14 treesize of output 10 [2021-11-21 01:32:57,855 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 16 treesize of output 12 [2021-11-21 01:32:57,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:57,928 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 183 treesize of output 182 [2021-11-21 01:32:57,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:57,941 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 179 treesize of output 178 [2021-11-21 01:32:57,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:57,951 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 175 treesize of output 174 [2021-11-21 01:32:58,183 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 14 treesize of output 10 [2021-11-21 01:32:58,208 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 16 treesize of output 12 [2021-11-21 01:32:58,234 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 14 treesize of output 10 [2021-11-21 01:32:58,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:32:58,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:32:58,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:32:58,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:32:59,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:32:59,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:32:59,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-21 01:32:59,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:32:59,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:33:00,125 INFO L197 IcfgInterpreter]: Interpreting procedure calloc_model with input of size 79 for LOIs [2021-11-21 01:33:02,558 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 14 treesize of output 10 [2021-11-21 01:33:02,619 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 14 treesize of output 10 [2021-11-21 01:33:02,645 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 16 treesize of output 12 [2021-11-21 01:33:02,855 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:04,486 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:04,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:33:04,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-21 01:33:04,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756127979] [2021-11-21 01:33:04,486 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:04,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:33:04,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:04,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:33:04,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:33:04,489 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:33:06,522 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:33:07,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:07,243 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2021-11-21 01:33:07,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:33:07,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-11-21 01:33:07,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:07,246 INFO L225 Difference]: With dead ends: 97 [2021-11-21 01:33:07,246 INFO L226 Difference]: Without dead ends: 97 [2021-11-21 01:33:07,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:33:07,248 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 2 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:07,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 301 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 349 Invalid, 1 Unknown, 48 Unchecked, 2.4s Time] [2021-11-21 01:33:07,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-21 01:33:07,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-21 01:33:07,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 90 states have internal predecessors, (96), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:33:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2021-11-21 01:33:07,262 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 21 [2021-11-21 01:33:07,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:07,263 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2021-11-21 01:33:07,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:33:07,263 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2021-11-21 01:33:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 01:33:07,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:07,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:07,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:07,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-21 01:33:07,486 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:33:07,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:07,486 INFO L85 PathProgramCache]: Analyzing trace with hash -87752369, now seen corresponding path program 1 times [2021-11-21 01:33:07,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:07,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095972982] [2021-11-21 01:33:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:07,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:07,500 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:33:07,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570036586] [2021-11-21 01:33:07,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:07,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:07,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:07,506 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:07,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:33:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:07,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-21 01:33:07,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:07,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-11-21 01:33:07,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:33:08,919 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:33:08,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 51 [2021-11-21 01:33:08,933 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:33:08,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 44 [2021-11-21 01:33:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:33:10,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:11,936 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:33:11,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-21 01:33:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:33:12,065 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:12,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095972982] [2021-11-21 01:33:12,066 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:33:12,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570036586] [2021-11-21 01:33:12,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570036586] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:12,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:33:12,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2021-11-21 01:33:12,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917085961] [2021-11-21 01:33:12,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:12,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:33:12,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:12,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:33:12,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:33:12,069 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:33:12,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:12,165 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2021-11-21 01:33:12,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:33:12,166 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-11-21 01:33:12,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:12,167 INFO L225 Difference]: With dead ends: 111 [2021-11-21 01:33:12,167 INFO L226 Difference]: Without dead ends: 111 [2021-11-21 01:33:12,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:33:12,169 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 139 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:12,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 192 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 237 Unchecked, 0.1s Time] [2021-11-21 01:33:12,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-21 01:33:12,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-11-21 01:33:12,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 101 states have internal predecessors, (110), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 01:33:12,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-11-21 01:33:12,176 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 22 [2021-11-21 01:33:12,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:12,177 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-11-21 01:33:12,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:33:12,178 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-11-21 01:33:12,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 01:33:12,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:12,179 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:12,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:12,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 01:33:12,393 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:33:12,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:12,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1662079572, now seen corresponding path program 2 times [2021-11-21 01:33:12,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:12,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78101703] [2021-11-21 01:33:12,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:12,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:12,417 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:33:12,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276303121] [2021-11-21 01:33:12,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:33:12,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:12,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:12,425 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:12,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:33:12,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:33:12,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:12,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 01:33:12,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:12,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-11-21 01:33:12,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:33:13,477 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:33:13,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 51 [2021-11-21 01:33:13,488 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:33:13,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 44 [2021-11-21 01:33:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:33:15,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:17,569 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:33:17,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-21 01:33:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:33:17,704 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:17,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78101703] [2021-11-21 01:33:17,704 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:33:17,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276303121] [2021-11-21 01:33:17,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276303121] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:17,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1394910031] [2021-11-21 01:33:17,708 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-21 01:33:17,708 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:17,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:17,709 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:17,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:17,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:33:18,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:33:18,349 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 14 treesize of output 10 [2021-11-21 01:33:18,553 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 16 treesize of output 12 [2021-11-21 01:33:18,643 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 14 treesize of output 10 [2021-11-21 01:33:18,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:18,704 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 183 treesize of output 182 [2021-11-21 01:33:18,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:18,716 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 179 treesize of output 178 [2021-11-21 01:33:18,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:18,727 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 175 treesize of output 174 [2021-11-21 01:33:19,891 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 14 treesize of output 10 [2021-11-21 01:33:19,906 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 14 treesize of output 10 [2021-11-21 01:33:19,916 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 16 treesize of output 12 [2021-11-21 01:33:19,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:33:20,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:33:20,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:33:20,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:33:20,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:33:20,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:33:20,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-21 01:33:21,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:33:21,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:33:21,855 INFO L197 IcfgInterpreter]: Interpreting procedure calloc_model with input of size 79 for LOIs [2021-11-21 01:33:24,428 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 16 treesize of output 12 [2021-11-21 01:33:24,506 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 14 treesize of output 10 [2021-11-21 01:33:24,570 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 14 treesize of output 10 [2021-11-21 01:33:24,736 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:27,926 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:27,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:33:27,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-21 01:33:27,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786996212] [2021-11-21 01:33:27,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:27,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 01:33:27,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:27,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 01:33:27,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:33:27,929 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:33:28,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:28,053 INFO L93 Difference]: Finished difference Result 137 states and 157 transitions. [2021-11-21 01:33:28,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 01:33:28,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-11-21 01:33:28,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:28,057 INFO L225 Difference]: With dead ends: 137 [2021-11-21 01:33:28,057 INFO L226 Difference]: Without dead ends: 137 [2021-11-21 01:33:28,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:33:28,059 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 68 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:28,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 351 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 304 Unchecked, 0.1s Time] [2021-11-21 01:33:28,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-21 01:33:28,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 112. [2021-11-21 01:33:28,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 68 states have (on average 1.6764705882352942) internal successors, (114), 103 states have internal predecessors, (114), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 01:33:28,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 125 transitions. [2021-11-21 01:33:28,069 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 125 transitions. Word has length 23 [2021-11-21 01:33:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:28,070 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 125 transitions. [2021-11-21 01:33:28,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:33:28,070 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 125 transitions. [2021-11-21 01:33:28,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 01:33:28,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:28,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:28,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:28,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:28,285 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:33:28,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:28,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1574648339, now seen corresponding path program 1 times [2021-11-21 01:33:28,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:28,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38598973] [2021-11-21 01:33:28,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:28,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:28,301 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:33:28,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772681444] [2021-11-21 01:33:28,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:28,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:28,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:28,304 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:28,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:33:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:28,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:33:28,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:33:28,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:33:28,472 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:28,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38598973] [2021-11-21 01:33:28,473 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:33:28,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772681444] [2021-11-21 01:33:28,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772681444] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:28,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:28,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:33:28,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035995233] [2021-11-21 01:33:28,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:28,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:33:28,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:28,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:33:28,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:33:28,475 INFO L87 Difference]: Start difference. First operand 112 states and 125 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:33:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:28,560 INFO L93 Difference]: Finished difference Result 111 states and 124 transitions. [2021-11-21 01:33:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:33:28,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-11-21 01:33:28,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:28,562 INFO L225 Difference]: With dead ends: 111 [2021-11-21 01:33:28,562 INFO L226 Difference]: Without dead ends: 111 [2021-11-21 01:33:28,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:33:28,563 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 66 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:28,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 62 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:33:28,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-21 01:33:28,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-11-21 01:33:28,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 68 states have (on average 1.661764705882353) internal successors, (113), 102 states have internal predecessors, (113), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 01:33:28,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2021-11-21 01:33:28,571 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 23 [2021-11-21 01:33:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:28,571 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2021-11-21 01:33:28,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:33:28,572 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2021-11-21 01:33:28,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 01:33:28,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:28,573 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:28,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:28,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:28,777 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:33:28,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:28,778 INFO L85 PathProgramCache]: Analyzing trace with hash -26569204, now seen corresponding path program 3 times [2021-11-21 01:33:28,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:28,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687860941] [2021-11-21 01:33:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:28,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:28,788 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:33:28,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210931881] [2021-11-21 01:33:28,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:33:28,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:28,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:28,791 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:28,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 01:33:29,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:33:29,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:29,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-21 01:33:29,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:29,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-11-21 01:33:29,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:33:29,717 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:33:29,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 51 [2021-11-21 01:33:29,745 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:33:29,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 44 [2021-11-21 01:33:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:33:30,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:32,078 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:33:32,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-21 01:33:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:33:32,193 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:32,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687860941] [2021-11-21 01:33:32,194 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:33:32,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210931881] [2021-11-21 01:33:32,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210931881] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:32,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [998475479] [2021-11-21 01:33:32,197 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-21 01:33:32,198 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:32,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:32,198 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:32,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:32,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:33:32,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:33:32,591 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 16 treesize of output 12 [2021-11-21 01:33:32,622 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 14 treesize of output 10 [2021-11-21 01:33:32,635 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 14 treesize of output 10 [2021-11-21 01:33:32,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:32,668 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 183 treesize of output 182 [2021-11-21 01:33:32,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:32,676 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 179 treesize of output 178 [2021-11-21 01:33:32,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:32,694 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 175 treesize of output 174 [2021-11-21 01:33:33,862 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 14 treesize of output 10 [2021-11-21 01:33:33,880 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 14 treesize of output 10 [2021-11-21 01:33:33,892 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 16 treesize of output 12 [2021-11-21 01:33:34,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:33:34,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:33:34,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:33:34,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:33:34,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:33:34,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:33:34,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-21 01:33:35,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:33:35,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:33:35,851 INFO L197 IcfgInterpreter]: Interpreting procedure calloc_model with input of size 79 for LOIs [2021-11-21 01:33:38,446 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 14 treesize of output 10 [2021-11-21 01:33:38,463 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 14 treesize of output 10 [2021-11-21 01:33:38,561 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 16 treesize of output 12 [2021-11-21 01:33:38,784 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:41,486 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:41,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:33:41,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-11-21 01:33:41,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819285792] [2021-11-21 01:33:41,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:41,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-21 01:33:41,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:41,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-21 01:33:41,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:33:41,490 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand has 22 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:33:41,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:41,610 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2021-11-21 01:33:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:33:41,611 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2021-11-21 01:33:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:41,613 INFO L225 Difference]: With dead ends: 128 [2021-11-21 01:33:41,613 INFO L226 Difference]: Without dead ends: 128 [2021-11-21 01:33:41,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:33:41,615 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 137 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 406 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:41,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 465 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 406 Unchecked, 0.1s Time] [2021-11-21 01:33:41,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-21 01:33:41,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2021-11-21 01:33:41,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 103 states have internal predecessors, (115), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 01:33:41,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2021-11-21 01:33:41,625 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 25 [2021-11-21 01:33:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:41,628 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2021-11-21 01:33:41,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:33:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2021-11-21 01:33:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 01:33:41,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:41,631 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:41,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:41,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 01:33:41,845 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:33:41,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:41,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1408701927, now seen corresponding path program 1 times [2021-11-21 01:33:41,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:41,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202226383] [2021-11-21 01:33:41,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:41,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:41,856 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:33:41,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [584045748] [2021-11-21 01:33:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:41,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:41,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:41,874 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:41,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 01:33:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:41,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-21 01:33:41,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:42,173 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-21 01:33:42,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-21 01:33:42,205 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:33:42,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-11-21 01:33:42,419 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-21 01:33:42,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 45 [2021-11-21 01:33:42,442 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-21 01:33:42,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2021-11-21 01:33:46,906 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 01:33:46,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-21 01:33:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:33:47,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:47,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:47,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202226383] [2021-11-21 01:33:47,261 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:33:47,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584045748] [2021-11-21 01:33:47,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584045748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:47,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1130409979] [2021-11-21 01:33:47,264 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 01:33:47,265 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:47,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:47,265 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:47,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:47,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:33:47,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:33:47,731 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 16 treesize of output 12 [2021-11-21 01:33:47,787 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 14 treesize of output 10 [2021-11-21 01:33:47,911 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 14 treesize of output 10 [2021-11-21 01:33:47,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:47,975 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 183 treesize of output 182 [2021-11-21 01:33:48,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:48,002 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 179 treesize of output 178 [2021-11-21 01:33:48,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:48,013 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 175 treesize of output 174 [2021-11-21 01:33:49,145 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 16 treesize of output 12 [2021-11-21 01:33:49,157 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 14 treesize of output 10 [2021-11-21 01:33:49,169 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 14 treesize of output 10 [2021-11-21 01:33:49,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:33:49,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:33:49,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:33:49,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:33:49,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:33:50,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:33:50,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-21 01:33:50,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:33:50,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:33:50,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:50,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:50,644 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:33:50,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-21 01:33:50,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:50,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:50,727 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:33:50,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 41 [2021-11-21 01:33:50,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 01:33:50,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:50,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:50,983 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:33:50,983 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 32 treesize of output 34 [2021-11-21 01:33:51,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:51,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:51,084 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:33:51,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 48 [2021-11-21 01:33:51,150 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 15 treesize of output 1 [2021-11-21 01:33:51,766 INFO L197 IcfgInterpreter]: Interpreting procedure calloc_model with input of size 79 for LOIs [2021-11-21 01:33:54,251 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 14 treesize of output 10 [2021-11-21 01:33:54,276 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 14 treesize of output 10 [2021-11-21 01:33:54,366 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 16 treesize of output 12 [2021-11-21 01:33:54,555 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:56,969 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:56,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:33:56,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-21 01:33:56,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869870184] [2021-11-21 01:33:56,970 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:56,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:33:56,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:56,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:33:56,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=815, Unknown=2, NotChecked=0, Total=930 [2021-11-21 01:33:56,972 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:33:57,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:57,241 INFO L93 Difference]: Finished difference Result 140 states and 164 transitions. [2021-11-21 01:33:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:33:57,241 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-11-21 01:33:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:57,243 INFO L225 Difference]: With dead ends: 140 [2021-11-21 01:33:57,243 INFO L226 Difference]: Without dead ends: 140 [2021-11-21 01:33:57,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=132, Invalid=988, Unknown=2, NotChecked=0, Total=1122 [2021-11-21 01:33:57,245 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 8 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:57,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 251 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 174 Invalid, 0 Unknown, 117 Unchecked, 0.2s Time] [2021-11-21 01:33:57,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-21 01:33:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2021-11-21 01:33:57,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 92 states have (on average 1.5869565217391304) internal successors, (146), 125 states have internal predecessors, (146), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-21 01:33:57,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2021-11-21 01:33:57,255 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 25 [2021-11-21 01:33:57,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:57,255 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2021-11-21 01:33:57,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:33:57,256 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2021-11-21 01:33:57,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 01:33:57,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:57,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:57,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:57,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 01:33:57,473 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:33:57,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:57,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1408701926, now seen corresponding path program 1 times [2021-11-21 01:33:57,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:57,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668166985] [2021-11-21 01:33:57,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:57,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:57,484 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:33:57,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609167718] [2021-11-21 01:33:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:57,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:57,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:57,486 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:57,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 01:33:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:57,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 01:33:57,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:57,686 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:33:57,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-21 01:33:57,752 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:33:57,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-21 01:33:57,787 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:33:57,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-21 01:33:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:33:57,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:33:57,831 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:57,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668166985] [2021-11-21 01:33:57,831 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:33:57,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609167718] [2021-11-21 01:33:57,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609167718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:57,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:57,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:33:57,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190927847] [2021-11-21 01:33:57,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:57,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:33:57,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:57,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:33:57,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:33:57,834 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:33:58,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:58,057 INFO L93 Difference]: Finished difference Result 158 states and 179 transitions. [2021-11-21 01:33:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:33:58,058 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-11-21 01:33:58,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:58,060 INFO L225 Difference]: With dead ends: 158 [2021-11-21 01:33:58,060 INFO L226 Difference]: Without dead ends: 158 [2021-11-21 01:33:58,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:33:58,061 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 81 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:58,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 192 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 194 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2021-11-21 01:33:58,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-21 01:33:58,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2021-11-21 01:33:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 95 states have (on average 1.5789473684210527) internal successors, (150), 126 states have internal predecessors, (150), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-21 01:33:58,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 164 transitions. [2021-11-21 01:33:58,070 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 164 transitions. Word has length 25 [2021-11-21 01:33:58,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:58,070 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 164 transitions. [2021-11-21 01:33:58,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:33:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 164 transitions. [2021-11-21 01:33:58,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 01:33:58,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:58,071 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:58,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:58,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:58,277 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:33:58,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:58,278 INFO L85 PathProgramCache]: Analyzing trace with hash 234598543, now seen corresponding path program 4 times [2021-11-21 01:33:58,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:58,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071141378] [2021-11-21 01:33:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:58,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:58,287 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:33:58,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240338777] [2021-11-21 01:33:58,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:33:58,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:58,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:58,300 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:58,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 01:33:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:58,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 01:33:58,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:58,760 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:33:58,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-21 01:33:58,769 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:33:58,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-21 01:33:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:33:58,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:33:58,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:58,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071141378] [2021-11-21 01:33:58,844 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:33:58,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240338777] [2021-11-21 01:33:58,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240338777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:58,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:58,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:33:58,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512863432] [2021-11-21 01:33:58,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:58,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:33:58,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:33:58,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:33:58,847 INFO L87 Difference]: Start difference. First operand 139 states and 164 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:33:58,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:58,947 INFO L93 Difference]: Finished difference Result 138 states and 162 transitions. [2021-11-21 01:33:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:33:58,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-11-21 01:33:58,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:58,950 INFO L225 Difference]: With dead ends: 138 [2021-11-21 01:33:58,950 INFO L226 Difference]: Without dead ends: 138 [2021-11-21 01:33:58,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:33:58,951 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 0 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:58,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 233 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 146 Unchecked, 0.1s Time] [2021-11-21 01:33:58,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-21 01:33:58,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2021-11-21 01:33:58,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 73 states have (on average 1.6027397260273972) internal successors, (117), 104 states have internal predecessors, (117), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-21 01:33:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2021-11-21 01:33:58,959 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 26 [2021-11-21 01:33:58,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:58,959 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2021-11-21 01:33:58,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:33:58,960 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2021-11-21 01:33:58,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 01:33:58,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:58,966 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:59,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:59,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 01:33:59,181 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:33:59,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:59,182 INFO L85 PathProgramCache]: Analyzing trace with hash 720086782, now seen corresponding path program 1 times [2021-11-21 01:33:59,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:59,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897082855] [2021-11-21 01:33:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:59,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:59,199 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:33:59,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733130862] [2021-11-21 01:33:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:59,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:59,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:59,201 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:59,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 01:33:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:59,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 01:33:59,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:33:59,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:59,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:33:59,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-21 01:33:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:33:59,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:59,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897082855] [2021-11-21 01:33:59,743 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:33:59,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733130862] [2021-11-21 01:33:59,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733130862] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:59,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1105969223] [2021-11-21 01:33:59,746 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-21 01:33:59,746 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:59,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:59,747 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:59,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:00,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:34:00,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:34:00,327 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 16 treesize of output 12 [2021-11-21 01:34:00,341 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 14 treesize of output 10 [2021-11-21 01:34:00,409 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 14 treesize of output 10 [2021-11-21 01:34:00,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:00,532 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 183 treesize of output 182 [2021-11-21 01:34:00,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:00,543 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 179 treesize of output 178 [2021-11-21 01:34:00,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:00,550 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 175 treesize of output 174 [2021-11-21 01:34:01,441 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 14 treesize of output 10 [2021-11-21 01:34:01,447 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 16 treesize of output 12 [2021-11-21 01:34:01,461 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 14 treesize of output 10 [2021-11-21 01:34:01,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:34:01,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:34:01,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:34:01,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:34:02,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:34:02,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:34:02,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:34:02,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:34:02,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-21 01:34:02,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 01:34:03,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:03,032 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:34:03,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-21 01:34:03,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:03,079 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:34:03,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 41 [2021-11-21 01:34:03,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:03,225 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:34:03,225 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 58 treesize of output 48 [2021-11-21 01:34:03,265 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 15 treesize of output 1 [2021-11-21 01:34:03,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:03,364 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:34:03,364 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 32 treesize of output 34 [2021-11-21 01:34:04,106 INFO L197 IcfgInterpreter]: Interpreting procedure calloc_model with input of size 79 for LOIs [2021-11-21 01:34:06,557 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 16 treesize of output 12 [2021-11-21 01:34:06,574 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 14 treesize of output 10 [2021-11-21 01:34:06,631 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 14 treesize of output 10 [2021-11-21 01:34:06,846 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:09,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1105969223] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:09,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:34:09,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [7, 7] total 30 [2021-11-21 01:34:09,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977806892] [2021-11-21 01:34:09,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:09,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 01:34:09,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:09,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 01:34:09,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:34:09,124 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand has 19 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:34:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:11,518 INFO L93 Difference]: Finished difference Result 195 states and 219 transitions. [2021-11-21 01:34:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 01:34:11,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-21 01:34:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:11,520 INFO L225 Difference]: With dead ends: 195 [2021-11-21 01:34:11,520 INFO L226 Difference]: Without dead ends: 195 [2021-11-21 01:34:11,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:34:11,522 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 127 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:11,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 274 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:34:11,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-21 01:34:11,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 130. [2021-11-21 01:34:11,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 87 states have (on average 1.5517241379310345) internal successors, (135), 118 states have internal predecessors, (135), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:34:11,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 147 transitions. [2021-11-21 01:34:11,530 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 147 transitions. Word has length 26 [2021-11-21 01:34:11,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:11,531 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 147 transitions. [2021-11-21 01:34:11,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:34:11,531 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 147 transitions. [2021-11-21 01:34:11,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 01:34:11,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:11,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:11,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:11,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 01:34:11,749 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:34:11,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:11,750 INFO L85 PathProgramCache]: Analyzing trace with hash 847857429, now seen corresponding path program 1 times [2021-11-21 01:34:11,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:11,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080786244] [2021-11-21 01:34:11,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:11,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:11,758 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:11,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121379745] [2021-11-21 01:34:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:11,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:11,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:11,768 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:11,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 01:34:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:11,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:34:11,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:34:11,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:34:11,904 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:11,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080786244] [2021-11-21 01:34:11,905 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:11,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121379745] [2021-11-21 01:34:11,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121379745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:11,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:34:11,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:34:11,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105136977] [2021-11-21 01:34:11,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:11,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:34:11,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:11,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:34:11,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:34:11,906 INFO L87 Difference]: Start difference. First operand 130 states and 147 transitions. Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:34:11,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:11,975 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2021-11-21 01:34:11,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:34:11,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-11-21 01:34:11,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:11,977 INFO L225 Difference]: With dead ends: 129 [2021-11-21 01:34:11,977 INFO L226 Difference]: Without dead ends: 129 [2021-11-21 01:34:11,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:34:11,978 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 55 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:11,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 61 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:34:11,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-21 01:34:11,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-21 01:34:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 87 states have (on average 1.5402298850574712) internal successors, (134), 117 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:34:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 146 transitions. [2021-11-21 01:34:11,985 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 146 transitions. Word has length 27 [2021-11-21 01:34:11,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:11,986 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 146 transitions. [2021-11-21 01:34:11,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:34:11,986 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 146 transitions. [2021-11-21 01:34:11,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 01:34:11,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:11,987 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:12,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:12,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 01:34:12,197 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:34:12,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:12,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1252687794, now seen corresponding path program 1 times [2021-11-21 01:34:12,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:12,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21351599] [2021-11-21 01:34:12,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:12,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:12,205 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:12,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475975700] [2021-11-21 01:34:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:12,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:12,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:12,213 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:12,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 01:34:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:12,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:34:12,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:34:12,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:34:12,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:12,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21351599] [2021-11-21 01:34:12,507 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:12,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475975700] [2021-11-21 01:34:12,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475975700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:12,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:34:12,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:34:12,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79457193] [2021-11-21 01:34:12,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:12,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:34:12,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:12,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:34:12,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:34:12,509 INFO L87 Difference]: Start difference. First operand 129 states and 146 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:34:12,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:12,590 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2021-11-21 01:34:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:34:12,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-11-21 01:34:12,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:12,592 INFO L225 Difference]: With dead ends: 124 [2021-11-21 01:34:12,592 INFO L226 Difference]: Without dead ends: 124 [2021-11-21 01:34:12,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:34:12,593 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 122 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:12,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 48 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:34:12,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-21 01:34:12,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-11-21 01:34:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 87 states have (on average 1.4597701149425288) internal successors, (127), 112 states have internal predecessors, (127), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:34:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 139 transitions. [2021-11-21 01:34:12,599 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 139 transitions. Word has length 29 [2021-11-21 01:34:12,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:12,599 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 139 transitions. [2021-11-21 01:34:12,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:34:12,600 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 139 transitions. [2021-11-21 01:34:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 01:34:12,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:12,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:12,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:12,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:12,809 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:34:12,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:12,810 INFO L85 PathProgramCache]: Analyzing trace with hash -178615922, now seen corresponding path program 1 times [2021-11-21 01:34:12,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:12,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763912862] [2021-11-21 01:34:12,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:12,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:12,818 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:12,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764960726] [2021-11-21 01:34:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:12,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:12,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:12,822 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:12,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-21 01:34:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:12,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:34:12,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:13,138 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 17 treesize of output 13 [2021-11-21 01:34:13,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-21 01:34:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:34:13,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:34:13,170 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:13,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763912862] [2021-11-21 01:34:13,170 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:13,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764960726] [2021-11-21 01:34:13,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764960726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:13,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:34:13,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:34:13,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817884416] [2021-11-21 01:34:13,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:13,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:34:13,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:13,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:34:13,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:34:13,171 INFO L87 Difference]: Start difference. First operand 124 states and 139 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:34:13,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:13,420 INFO L93 Difference]: Finished difference Result 152 states and 168 transitions. [2021-11-21 01:34:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:34:13,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-11-21 01:34:13,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:13,421 INFO L225 Difference]: With dead ends: 152 [2021-11-21 01:34:13,421 INFO L226 Difference]: Without dead ends: 152 [2021-11-21 01:34:13,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:34:13,422 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 203 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:13,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 128 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:34:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-21 01:34:13,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 134. [2021-11-21 01:34:13,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 94 states have (on average 1.4361702127659575) internal successors, (135), 120 states have internal predecessors, (135), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-21 01:34:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 151 transitions. [2021-11-21 01:34:13,430 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 151 transitions. Word has length 30 [2021-11-21 01:34:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:13,430 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 151 transitions. [2021-11-21 01:34:13,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:34:13,431 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 151 transitions. [2021-11-21 01:34:13,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 01:34:13,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:13,432 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:13,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:13,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:13,645 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:34:13,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:13,646 INFO L85 PathProgramCache]: Analyzing trace with hash -178615921, now seen corresponding path program 1 times [2021-11-21 01:34:13,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:13,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948496382] [2021-11-21 01:34:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:13,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:13,653 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:13,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112305903] [2021-11-21 01:34:13,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:13,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:13,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:13,655 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:13,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-21 01:34:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:13,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-21 01:34:13,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:14,212 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 33 treesize of output 29 [2021-11-21 01:34:14,216 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 30 treesize of output 26 [2021-11-21 01:34:14,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-11-21 01:34:14,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-21 01:34:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:34:14,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:34:14,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:14,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948496382] [2021-11-21 01:34:14,296 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:14,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112305903] [2021-11-21 01:34:14,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112305903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:14,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:34:14,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:34:14,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600388728] [2021-11-21 01:34:14,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:14,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:34:14,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:14,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:34:14,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:34:14,299 INFO L87 Difference]: Start difference. First operand 134 states and 151 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:34:14,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:14,663 INFO L93 Difference]: Finished difference Result 167 states and 184 transitions. [2021-11-21 01:34:14,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:34:14,664 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-11-21 01:34:14,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:14,665 INFO L225 Difference]: With dead ends: 167 [2021-11-21 01:34:14,665 INFO L226 Difference]: Without dead ends: 167 [2021-11-21 01:34:14,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:34:14,667 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 244 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:14,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 119 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:34:14,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-21 01:34:14,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 134. [2021-11-21 01:34:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 94 states have (on average 1.425531914893617) internal successors, (134), 120 states have internal predecessors, (134), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-21 01:34:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 150 transitions. [2021-11-21 01:34:14,681 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 150 transitions. Word has length 30 [2021-11-21 01:34:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:14,682 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 150 transitions. [2021-11-21 01:34:14,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:34:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 150 transitions. [2021-11-21 01:34:14,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 01:34:14,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:14,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:14,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:14,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:14,889 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:34:14,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:14,890 INFO L85 PathProgramCache]: Analyzing trace with hash 148884112, now seen corresponding path program 1 times [2021-11-21 01:34:14,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:14,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758186559] [2021-11-21 01:34:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:14,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:14,897 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:14,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653569292] [2021-11-21 01:34:14,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:14,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:14,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:14,898 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:14,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-21 01:34:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:14,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:34:14,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:15,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-21 01:34:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:34:15,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:34:15,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:15,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758186559] [2021-11-21 01:34:15,048 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:15,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653569292] [2021-11-21 01:34:15,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653569292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:15,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:34:15,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:34:15,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536845568] [2021-11-21 01:34:15,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:15,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:34:15,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:15,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:34:15,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:34:15,050 INFO L87 Difference]: Start difference. First operand 134 states and 150 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:34:15,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:15,160 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2021-11-21 01:34:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:34:15,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-11-21 01:34:15,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:15,162 INFO L225 Difference]: With dead ends: 145 [2021-11-21 01:34:15,162 INFO L226 Difference]: Without dead ends: 145 [2021-11-21 01:34:15,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:34:15,163 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 30 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:15,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 153 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:34:15,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-21 01:34:15,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 133. [2021-11-21 01:34:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 94 states have (on average 1.4148936170212767) internal successors, (133), 119 states have internal predecessors, (133), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-21 01:34:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 149 transitions. [2021-11-21 01:34:15,171 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 149 transitions. Word has length 32 [2021-11-21 01:34:15,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:15,171 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 149 transitions. [2021-11-21 01:34:15,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:34:15,172 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 149 transitions. [2021-11-21 01:34:15,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 01:34:15,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:15,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:15,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:15,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:15,389 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:34:15,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:15,390 INFO L85 PathProgramCache]: Analyzing trace with hash 148884113, now seen corresponding path program 1 times [2021-11-21 01:34:15,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:15,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860319279] [2021-11-21 01:34:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:15,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:15,397 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:15,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349135362] [2021-11-21 01:34:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:15,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:15,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:15,399 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:15,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-21 01:34:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:15,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-21 01:34:15,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:15,857 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 30 treesize of output 26 [2021-11-21 01:34:15,861 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 23 treesize of output 19 [2021-11-21 01:34:15,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-11-21 01:34:15,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-21 01:34:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:34:15,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:34:15,979 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:15,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860319279] [2021-11-21 01:34:15,979 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:15,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349135362] [2021-11-21 01:34:15,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349135362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:15,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:34:15,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 01:34:15,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576544951] [2021-11-21 01:34:15,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:15,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:34:15,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:15,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:34:15,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:34:15,981 INFO L87 Difference]: Start difference. First operand 133 states and 149 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:34:16,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:16,417 INFO L93 Difference]: Finished difference Result 164 states and 181 transitions. [2021-11-21 01:34:16,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:34:16,417 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2021-11-21 01:34:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:16,418 INFO L225 Difference]: With dead ends: 164 [2021-11-21 01:34:16,419 INFO L226 Difference]: Without dead ends: 164 [2021-11-21 01:34:16,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:34:16,420 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 238 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:16,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 174 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:34:16,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-21 01:34:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2021-11-21 01:34:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 95 states have (on average 1.4105263157894736) internal successors, (134), 120 states have internal predecessors, (134), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-21 01:34:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 150 transitions. [2021-11-21 01:34:16,428 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 150 transitions. Word has length 32 [2021-11-21 01:34:16,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:16,428 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 150 transitions. [2021-11-21 01:34:16,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:34:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 150 transitions. [2021-11-21 01:34:16,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 01:34:16,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:16,430 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:16,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:16,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:16,645 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:34:16,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:16,646 INFO L85 PathProgramCache]: Analyzing trace with hash 320442884, now seen corresponding path program 1 times [2021-11-21 01:34:16,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:16,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118063571] [2021-11-21 01:34:16,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:16,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:16,653 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:16,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091083891] [2021-11-21 01:34:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:16,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:16,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:16,665 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:16,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-21 01:34:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:16,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-21 01:34:16,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:16,934 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:34:16,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 01:34:17,237 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:34:17,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-21 01:34:17,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 01:34:17,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:17,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-21 01:34:17,587 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 11 treesize of output 7 [2021-11-21 01:34:17,591 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 25 treesize of output 24 [2021-11-21 01:34:17,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 01:34:17,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:17,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 16 [2021-11-21 01:34:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:34:17,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:17,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 103 [2021-11-21 01:34:27,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:28,296 INFO L354 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2021-11-21 01:34:28,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 14060 treesize of output 13232 [2021-11-21 01:34:28,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:28,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118063571] [2021-11-21 01:34:28,704 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:28,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091083891] [2021-11-21 01:34:28,704 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 01:34:28,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1653978787] [2021-11-21 01:34:28,707 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-21 01:34:28,707 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:28,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:28,708 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:28,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:28,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:34:28,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:34:29,142 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 14 treesize of output 10 [2021-11-21 01:34:29,329 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 16 treesize of output 12 [2021-11-21 01:34:29,435 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 14 treesize of output 10 [2021-11-21 01:34:29,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:29,502 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 183 treesize of output 182 [2021-11-21 01:34:29,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:29,513 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 179 treesize of output 178 [2021-11-21 01:34:29,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:29,525 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 175 treesize of output 174 [2021-11-21 01:34:30,806 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 14 treesize of output 10 [2021-11-21 01:34:30,823 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 16 treesize of output 12 [2021-11-21 01:34:30,842 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 14 treesize of output 10 [2021-11-21 01:34:30,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:34:30,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:34:31,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:34:31,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:34:31,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:34:31,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:34:31,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:34:31,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:34:32,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-21 01:34:32,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 01:34:32,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:32,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:32,565 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:34:32,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 41 [2021-11-21 01:34:32,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:32,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:32,699 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:34:32,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-21 01:34:32,785 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 15 treesize of output 1 [2021-11-21 01:34:32,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:32,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:32,822 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:34:32,822 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 32 treesize of output 34 [2021-11-21 01:34:32,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:32,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:32,972 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:34:32,972 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 58 treesize of output 48 [2021-11-21 01:34:33,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:33,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:33,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:33,676 INFO L354 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2021-11-21 01:34:33,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 61 [2021-11-21 01:34:33,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:34:34,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:34,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:34,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:34,100 INFO L354 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2021-11-21 01:34:34,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 47 [2021-11-21 01:34:34,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:34,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:34,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:34,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:34,258 INFO L354 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2021-11-21 01:34:34,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 70 treesize of output 83 [2021-11-21 01:34:34,911 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 15 treesize of output 1 [2021-11-21 01:34:35,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:35,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:35,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:35,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:35,062 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-21 01:34:35,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 53 treesize of output 54 [2021-11-21 01:34:38,728 INFO L197 IcfgInterpreter]: Interpreting procedure calloc_model with input of size 79 for LOIs [2021-11-21 01:34:41,186 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 16 treesize of output 12 [2021-11-21 01:34:41,244 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 14 treesize of output 10 [2021-11-21 01:34:41,286 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 14 treesize of output 10 [2021-11-21 01:34:41,479 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:47,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1653978787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:47,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:34:47,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-21 01:34:47,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295721008] [2021-11-21 01:34:47,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:47,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 01:34:47,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:47,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 01:34:47,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2278, Unknown=2, NotChecked=0, Total=2550 [2021-11-21 01:34:47,654 INFO L87 Difference]: Start difference. First operand 134 states and 150 transitions. Second operand has 26 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:34:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:50,316 INFO L93 Difference]: Finished difference Result 147 states and 165 transitions. [2021-11-21 01:34:50,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-21 01:34:50,317 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-11-21 01:34:50,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:50,318 INFO L225 Difference]: With dead ends: 147 [2021-11-21 01:34:50,318 INFO L226 Difference]: Without dead ends: 147 [2021-11-21 01:34:50,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=290, Invalid=2464, Unknown=2, NotChecked=0, Total=2756 [2021-11-21 01:34:50,320 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 17 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:50,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 194 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 498 Invalid, 0 Unknown, 44 Unchecked, 0.9s Time] [2021-11-21 01:34:50,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-21 01:34:50,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 141. [2021-11-21 01:34:50,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 102 states have (on average 1.4019607843137254) internal successors, (143), 127 states have internal predecessors, (143), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-21 01:34:50,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 159 transitions. [2021-11-21 01:34:50,328 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 159 transitions. Word has length 33 [2021-11-21 01:34:50,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:50,328 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 159 transitions. [2021-11-21 01:34:50,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:34:50,329 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 159 transitions. [2021-11-21 01:34:50,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 01:34:50,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:50,330 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:50,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:50,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-21 01:34:50,545 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:34:50,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:50,546 INFO L85 PathProgramCache]: Analyzing trace with hash 320442885, now seen corresponding path program 1 times [2021-11-21 01:34:50,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:50,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14591690] [2021-11-21 01:34:50,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:50,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:50,553 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:50,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569683457] [2021-11-21 01:34:50,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:50,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:50,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:50,555 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:50,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-21 01:34:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:50,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-21 01:34:50,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:50,846 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:34:50,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 01:34:51,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 01:34:51,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-21 01:34:51,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:51,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 50 [2021-11-21 01:34:51,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:51,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 33 [2021-11-21 01:34:51,446 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 49 treesize of output 48 [2021-11-21 01:34:51,450 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 54 treesize of output 45 [2021-11-21 01:34:51,686 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-21 01:34:51,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 54 [2021-11-21 01:34:51,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:51,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 21 [2021-11-21 01:34:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:34:51,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:54,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:54,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 15304 treesize of output 15020 [2021-11-21 01:35:03,641 WARN L227 SmtUtils]: Spent 8.47s on a formula simplification. DAG size of input: 692 DAG size of output: 332 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:35:03,643 INFO L354 Elim1Store]: treesize reduction 1740, result has 32.6 percent of original size [2021-11-21 01:35:03,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 21 select indices, 21 select index equivalence classes, 0 disjoint index pairs (out of 210 index pairs), introduced 22 new quantified variables, introduced 210 case distinctions, treesize of input 2144173 treesize of output 2035051 [2021-11-21 01:35:28,900 WARN L227 SmtUtils]: Spent 25.24s on a formula simplification. DAG size of input: 4286 DAG size of output: 4281 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 01:35:36,028 WARN L227 SmtUtils]: Spent 7.08s on a formula simplification that was a NOOP. DAG size: 3688 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 01:35:36,088 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:36,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14591690] [2021-11-21 01:35:36,088 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:35:36,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569683457] [2021-11-21 01:35:36,089 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 01:35:36,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [618089496] [2021-11-21 01:35:36,091 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-21 01:35:36,092 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:35:36,092 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:35:36,092 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:35:36,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:35:36,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:35:36,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:35:36,505 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 14 treesize of output 10 [2021-11-21 01:35:36,765 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 16 treesize of output 12 [2021-11-21 01:35:36,781 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 14 treesize of output 10 [2021-11-21 01:35:36,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:36,912 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 183 treesize of output 182 [2021-11-21 01:35:36,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:36,921 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 179 treesize of output 178 [2021-11-21 01:35:36,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:36,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 174 [2021-11-21 01:35:37,899 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 14 treesize of output 10 [2021-11-21 01:35:37,914 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 16 treesize of output 12 [2021-11-21 01:35:37,927 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 14 treesize of output 10 [2021-11-21 01:35:37,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:35:38,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:35:38,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:35:38,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:35:38,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:35:38,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:35:39,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:35:39,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-21 01:35:39,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:35:39,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:39,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:39,800 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:35:39,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-21 01:35:39,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 01:35:39,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:39,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:39,892 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:35:39,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 41 [2021-11-21 01:35:40,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:40,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:40,231 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:35:40,232 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 58 treesize of output 48 [2021-11-21 01:35:40,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:40,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:40,465 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:35:40,465 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 32 treesize of output 34 [2021-11-21 01:35:40,498 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 15 treesize of output 1 [2021-11-21 01:35:41,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:41,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:41,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:41,447 INFO L354 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2021-11-21 01:35:41,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 61 [2021-11-21 01:35:41,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:41,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:41,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:41,785 INFO L354 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2021-11-21 01:35:41,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 47 [2021-11-21 01:35:41,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:35:42,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:42,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:42,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:42,080 INFO L354 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2021-11-21 01:35:42,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 70 treesize of output 83 [2021-11-21 01:35:42,723 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 15 treesize of output 1 [2021-11-21 01:35:42,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:42,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:42,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:42,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:42,884 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-21 01:35:42,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 53 treesize of output 54 [2021-11-21 01:35:46,978 INFO L197 IcfgInterpreter]: Interpreting procedure calloc_model with input of size 79 for LOIs [2021-11-21 01:35:49,909 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 14 treesize of output 10 [2021-11-21 01:35:49,963 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 16 treesize of output 12 [2021-11-21 01:35:50,049 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 14 treesize of output 10 [2021-11-21 01:35:50,361 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:35:57,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [618089496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:57,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:57,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-21 01:35:57,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122335144] [2021-11-21 01:35:57,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:57,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 01:35:57,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:57,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 01:35:57,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=2087, Unknown=1, NotChecked=0, Total=2352 [2021-11-21 01:35:57,209 INFO L87 Difference]: Start difference. First operand 141 states and 159 transitions. Second operand has 26 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:36:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:00,462 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2021-11-21 01:36:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-21 01:36:00,463 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-11-21 01:36:00,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:00,464 INFO L225 Difference]: With dead ends: 147 [2021-11-21 01:36:00,464 INFO L226 Difference]: Without dead ends: 147 [2021-11-21 01:36:00,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=279, Invalid=2270, Unknown=1, NotChecked=0, Total=2550 [2021-11-21 01:36:00,466 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:00,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 356 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 721 Invalid, 0 Unknown, 154 Unchecked, 1.4s Time] [2021-11-21 01:36:00,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-21 01:36:00,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 141. [2021-11-21 01:36:00,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 102 states have (on average 1.392156862745098) internal successors, (142), 127 states have internal predecessors, (142), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-21 01:36:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 158 transitions. [2021-11-21 01:36:00,473 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 158 transitions. Word has length 33 [2021-11-21 01:36:00,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:00,474 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 158 transitions. [2021-11-21 01:36:00,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:36:00,474 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 158 transitions. [2021-11-21 01:36:00,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:36:00,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:00,475 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:00,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:00,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-21 01:36:00,693 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:36:00,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:00,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1343797245, now seen corresponding path program 1 times [2021-11-21 01:36:00,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:00,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718937794] [2021-11-21 01:36:00,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:00,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:00,700 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:36:00,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953186285] [2021-11-21 01:36:00,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:00,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:00,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:00,701 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:00,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-21 01:36:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:00,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:36:00,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:36:00,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:36:00,859 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:00,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718937794] [2021-11-21 01:36:00,859 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:36:00,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953186285] [2021-11-21 01:36:00,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953186285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:00,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:00,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:36:00,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169976841] [2021-11-21 01:36:00,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:00,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:36:00,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:00,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:36:00,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:36:00,861 INFO L87 Difference]: Start difference. First operand 141 states and 158 transitions. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:36:00,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:00,933 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2021-11-21 01:36:00,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:36:00,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2021-11-21 01:36:00,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:00,942 INFO L225 Difference]: With dead ends: 140 [2021-11-21 01:36:00,942 INFO L226 Difference]: Without dead ends: 140 [2021-11-21 01:36:00,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:36:00,943 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:00,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 81 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:36:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-21 01:36:00,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-11-21 01:36:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 102 states have (on average 1.3823529411764706) internal successors, (141), 126 states have internal predecessors, (141), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-21 01:36:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 157 transitions. [2021-11-21 01:36:00,950 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 157 transitions. Word has length 34 [2021-11-21 01:36:00,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:00,951 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 157 transitions. [2021-11-21 01:36:00,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:36:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 157 transitions. [2021-11-21 01:36:00,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:36:00,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:00,952 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:00,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:01,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:01,165 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:36:01,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:01,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1343797246, now seen corresponding path program 1 times [2021-11-21 01:36:01,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:01,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143869675] [2021-11-21 01:36:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:01,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:01,173 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:36:01,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412364721] [2021-11-21 01:36:01,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:01,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:01,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:01,176 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:01,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-21 01:36:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:01,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-21 01:36:01,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:01,468 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:36:01,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 01:36:01,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-21 01:36:01,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:01,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-21 01:36:01,975 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 34 treesize of output 30 [2021-11-21 01:36:01,979 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 31 treesize of output 30 [2021-11-21 01:36:02,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-21 01:36:02,207 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-21 01:36:02,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 22 [2021-11-21 01:36:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:36:02,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:02,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-21 01:36:02,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 76 [2021-11-21 01:36:10,195 INFO L354 Elim1Store]: treesize reduction 192, result has 55.7 percent of original size [2021-11-21 01:36:10,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 59520 treesize of output 54822 [2021-11-21 01:36:11,031 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:11,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143869675] [2021-11-21 01:36:11,031 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:36:11,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412364721] [2021-11-21 01:36:11,032 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 01:36:11,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1148545300] [2021-11-21 01:36:11,034 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-21 01:36:11,034 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:36:11,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:36:11,035 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:36:11,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:36:11,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:36:11,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:36:11,567 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 11 treesize of output 7 [2021-11-21 01:36:11,830 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 13 treesize of output 9 [2021-11-21 01:36:12,358 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 11 treesize of output 7 [2021-11-21 01:36:12,593 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-21 01:36:12,594 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 170 treesize of output 173 [2021-11-21 01:36:12,693 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 01:36:12,693 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 173 treesize of output 176 [2021-11-21 01:36:12,792 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 01:36:12,792 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 176 treesize of output 179 [2021-11-21 01:36:14,458 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 16 treesize of output 12 [2021-11-21 01:36:14,498 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 14 treesize of output 10 [2021-11-21 01:36:14,513 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 14 treesize of output 10 [2021-11-21 01:36:14,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:36:14,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:36:14,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:36:14,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:36:15,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:36:15,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:36:15,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-21 01:36:15,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:36:15,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:36:16,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 01:36:16,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:16,674 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:36:16,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 41 [2021-11-21 01:36:16,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:16,783 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:36:16,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-21 01:36:16,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:16,944 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:36:16,945 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 32 treesize of output 34 [2021-11-21 01:36:17,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:17,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:17,069 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:36:17,070 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 58 treesize of output 48 [2021-11-21 01:36:17,142 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 15 treesize of output 1 [2021-11-21 01:36:17,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:17,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:17,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:18,005 INFO L354 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2021-11-21 01:36:18,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 47 [2021-11-21 01:36:18,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:36:18,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:18,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:18,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:18,253 INFO L354 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2021-11-21 01:36:18,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 61 [2021-11-21 01:36:18,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:18,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:18,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:18,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:18,709 INFO L354 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2021-11-21 01:36:18,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 70 treesize of output 83 [2021-11-21 01:36:19,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:19,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:19,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:19,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:19,831 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-21 01:36:19,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 53 treesize of output 54 [2021-11-21 01:36:19,953 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 15 treesize of output 1 [2021-11-21 01:36:26,408 INFO L197 IcfgInterpreter]: Interpreting procedure calloc_model with input of size 79 for LOIs [2021-11-21 01:36:29,447 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 14 treesize of output 10 [2021-11-21 01:36:29,476 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 14 treesize of output 10 [2021-11-21 01:36:29,500 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 16 treesize of output 12 [2021-11-21 01:36:29,849 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:36:37,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1148545300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:37,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:37,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-21 01:36:37,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260699321] [2021-11-21 01:36:37,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:37,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-21 01:36:37,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:37,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-21 01:36:37,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2166, Unknown=1, NotChecked=0, Total=2450 [2021-11-21 01:36:37,569 INFO L87 Difference]: Start difference. First operand 140 states and 157 transitions. Second operand has 27 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:36:40,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:40,533 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2021-11-21 01:36:40,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-21 01:36:40,535 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2021-11-21 01:36:40,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:40,536 INFO L225 Difference]: With dead ends: 147 [2021-11-21 01:36:40,536 INFO L226 Difference]: Without dead ends: 147 [2021-11-21 01:36:40,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=298, Invalid=2353, Unknown=1, NotChecked=0, Total=2652 [2021-11-21 01:36:40,538 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:40,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 189 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 395 Invalid, 0 Unknown, 212 Unchecked, 0.8s Time] [2021-11-21 01:36:40,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-21 01:36:40,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 141. [2021-11-21 01:36:40,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 127 states have internal predecessors, (142), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-21 01:36:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 158 transitions. [2021-11-21 01:36:40,548 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 158 transitions. Word has length 34 [2021-11-21 01:36:40,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:40,548 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 158 transitions. [2021-11-21 01:36:40,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:36:40,549 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 158 transitions. [2021-11-21 01:36:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 01:36:40,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:40,550 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:40,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:40,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-21 01:36:40,769 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:36:40,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:40,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1090440886, now seen corresponding path program 1 times [2021-11-21 01:36:40,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:40,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61967366] [2021-11-21 01:36:40,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:40,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:40,797 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:36:40,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174601466] [2021-11-21 01:36:40,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:40,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:40,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:40,800 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:40,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-21 01:36:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:40,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-21 01:36:40,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:41,307 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-21 01:36:41,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-11-21 01:36:41,360 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:36:41,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 01:36:41,524 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:36:41,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2021-11-21 01:36:41,539 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-21 01:36:41,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-21 01:36:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:36:41,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:41,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:41,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61967366] [2021-11-21 01:36:41,931 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:36:41,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174601466] [2021-11-21 01:36:41,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174601466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:36:41,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [484069834] [2021-11-21 01:36:41,933 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-21 01:36:41,934 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:36:41,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:36:41,934 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:36:41,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:36:42,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:36:42,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:36:42,490 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 14 treesize of output 10 [2021-11-21 01:36:42,509 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 14 treesize of output 10 [2021-11-21 01:36:42,569 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 16 treesize of output 12 [2021-11-21 01:36:42,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:42,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 182 [2021-11-21 01:36:42,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:42,737 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 179 treesize of output 178 [2021-11-21 01:36:42,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:42,747 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 175 treesize of output 174 [2021-11-21 01:36:43,841 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 16 treesize of output 12 [2021-11-21 01:36:43,862 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 14 treesize of output 10 [2021-11-21 01:36:43,883 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 14 treesize of output 10 [2021-11-21 01:36:43,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:36:44,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:36:44,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:36:44,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:36:44,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:36:44,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:36:45,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-21 01:36:45,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:36:45,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:36:46,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:46,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:46,074 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:36:46,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-21 01:36:46,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 01:36:46,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:46,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:46,231 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:36:46,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 41 [2021-11-21 01:36:46,465 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 15 treesize of output 1 [2021-11-21 01:36:46,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:46,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:46,593 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:36:46,594 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 58 treesize of output 48 [2021-11-21 01:36:46,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:46,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:46,798 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:36:46,799 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 32 treesize of output 34 [2021-11-21 01:36:47,959 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-21 01:36:47,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 84 [2021-11-21 01:36:47,984 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:36:47,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 64 [2021-11-21 01:36:48,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:36:48,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 60 [2021-11-21 01:36:48,047 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:36:48,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 51 [2021-11-21 01:36:48,595 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-21 01:36:48,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 84 [2021-11-21 01:36:48,615 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:36:48,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 64 [2021-11-21 01:36:48,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:36:48,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 60 [2021-11-21 01:36:48,669 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:36:48,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 51 [2021-11-21 01:36:48,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:36:49,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:36:49,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:36:49,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-21 01:36:49,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:36:50,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 01:36:50,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:50,562 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:36:50,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-21 01:36:50,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:50,813 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:36:50,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 41 [2021-11-21 01:36:51,138 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 15 treesize of output 1 [2021-11-21 01:36:51,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:51,246 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:36:51,246 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 58 treesize of output 48 [2021-11-21 01:36:51,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:51,489 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:36:51,489 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 32 treesize of output 34 [2021-11-21 01:36:52,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 133 [2021-11-21 01:36:53,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:36:53,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:36:53,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:36:53,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-21 01:36:53,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:36:54,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:54,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:54,463 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:36:54,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 41 [2021-11-21 01:36:54,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 01:36:54,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:54,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:54,596 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:36:54,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-21 01:36:55,283 INFO L197 IcfgInterpreter]: Interpreting procedure calloc_model with input of size 79 for LOIs [2021-11-21 01:36:58,543 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 14 treesize of output 10 [2021-11-21 01:36:58,618 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 16 treesize of output 12 [2021-11-21 01:36:58,638 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 14 treesize of output 10 [2021-11-21 01:36:58,853 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:37:03,543 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:37:03,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:37:03,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-21 01:37:03,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641170930] [2021-11-21 01:37:03,544 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 01:37:03,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:37:03,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:37:03,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:37:03,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:37:03,545 INFO L87 Difference]: Start difference. First operand 141 states and 158 transitions. Second operand has 14 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:37:04,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:04,135 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2021-11-21 01:37:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 01:37:04,136 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2021-11-21 01:37:04,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:04,138 INFO L225 Difference]: With dead ends: 150 [2021-11-21 01:37:04,138 INFO L226 Difference]: Without dead ends: 150 [2021-11-21 01:37:04,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 01:37:04,140 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 92 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:04,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 350 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 243 Invalid, 0 Unknown, 148 Unchecked, 0.3s Time] [2021-11-21 01:37:04,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-21 01:37:04,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 123. [2021-11-21 01:37:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 91 states have (on average 1.3736263736263736) internal successors, (125), 112 states have internal predecessors, (125), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:37:04,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135 transitions. [2021-11-21 01:37:04,154 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 135 transitions. Word has length 35 [2021-11-21 01:37:04,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:04,155 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 135 transitions. [2021-11-21 01:37:04,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:37:04,155 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 135 transitions. [2021-11-21 01:37:04,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 01:37:04,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:04,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:37:04,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-21 01:37:04,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-21 01:37:04,369 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:37:04,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:04,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1291958286, now seen corresponding path program 1 times [2021-11-21 01:37:04,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:37:04,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78394051] [2021-11-21 01:37:04,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:04,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:37:04,375 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:37:04,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143016542] [2021-11-21 01:37:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:04,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:37:04,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:37:04,379 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:37:04,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-21 01:37:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:04,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-21 01:37:04,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:04,701 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:37:04,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 01:37:04,967 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-21 01:37:04,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-21 01:37:05,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:37:05,394 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-21 01:37:05,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-21 01:37:05,472 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 01:37:05,472 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 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-21 01:37:05,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-21 01:37:05,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 49 [2021-11-21 01:37:05,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,656 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-21 01:37:05,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 56 [2021-11-21 01:37:05,688 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 58 treesize of output 49 [2021-11-21 01:37:05,703 INFO L354 Elim1Store]: treesize reduction 73, result has 17.0 percent of original size [2021-11-21 01:37:05,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 76 [2021-11-21 01:37:06,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:06,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:37:06,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 46 [2021-11-21 01:37:06,108 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-21 01:37:06,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 39 [2021-11-21 01:37:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:37:06,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:08,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:37:08,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 222453 treesize of output 216869 [2021-11-21 01:37:09,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:37:09,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78394051] [2021-11-21 01:37:09,080 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:37:09,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143016542] [2021-11-21 01:37:09,080 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 01:37:09,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [477820754] [2021-11-21 01:37:09,083 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 01:37:09,083 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:37:09,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:37:09,084 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:37:09,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:37:09,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:37:09,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:37:09,505 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 16 treesize of output 12 [2021-11-21 01:37:09,602 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 14 treesize of output 10 [2021-11-21 01:37:09,627 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 14 treesize of output 10 [2021-11-21 01:37:09,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:09,709 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 183 treesize of output 182 [2021-11-21 01:37:09,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:09,721 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 179 treesize of output 178 [2021-11-21 01:37:09,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:09,733 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 175 treesize of output 174 [2021-11-21 01:37:11,078 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 14 treesize of output 10 [2021-11-21 01:37:11,087 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 14 treesize of output 10 [2021-11-21 01:37:11,109 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 16 treesize of output 12 [2021-11-21 01:37:11,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:37:11,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:37:11,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:37:11,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:37:12,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:37:12,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-21 01:37:12,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-21 01:37:12,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:37:12,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:37:13,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:13,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:13,051 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:37:13,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-21 01:37:13,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 01:37:13,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:13,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:13,145 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:37:13,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 41 [2021-11-21 01:37:13,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:13,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:13,425 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:37:13,426 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 58 treesize of output 48 [2021-11-21 01:37:13,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:13,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:13,572 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:37:13,573 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 32 treesize of output 34 [2021-11-21 01:37:13,784 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 15 treesize of output 1 [2021-11-21 01:37:14,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:14,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:14,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:14,794 INFO L354 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2021-11-21 01:37:14,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 47 [2021-11-21 01:37:14,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:14,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:14,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:14,992 INFO L354 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2021-11-21 01:37:14,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 61 [2021-11-21 01:37:15,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:37:15,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:15,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:15,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:15,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:15,585 INFO L354 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2021-11-21 01:37:15,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 70 treesize of output 83 [2021-11-21 01:37:16,846 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 15 treesize of output 1 [2021-11-21 01:37:16,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:16,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:16,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:16,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:16,969 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-21 01:37:16,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 53 treesize of output 54 [2021-11-21 01:37:24,785 INFO L197 IcfgInterpreter]: Interpreting procedure calloc_model with input of size 79 for LOIs [2021-11-21 01:37:27,709 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 14 treesize of output 10 [2021-11-21 01:37:27,853 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 14 treesize of output 10 [2021-11-21 01:37:27,916 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 16 treesize of output 12 [2021-11-21 01:37:28,144 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:37:38,109 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:37:38,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:37:38,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-21 01:37:38,110 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-21 01:37:38,110 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-21 01:37:38,116 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE (45 of 46 remaining) [2021-11-21 01:37:38,118 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (44 of 46 remaining) [2021-11-21 01:37:38,118 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (43 of 46 remaining) [2021-11-21 01:37:38,118 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (42 of 46 remaining) [2021-11-21 01:37:38,118 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (41 of 46 remaining) [2021-11-21 01:37:38,119 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (40 of 46 remaining) [2021-11-21 01:37:38,119 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (39 of 46 remaining) [2021-11-21 01:37:38,119 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (38 of 46 remaining) [2021-11-21 01:37:38,119 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (37 of 46 remaining) [2021-11-21 01:37:38,120 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (36 of 46 remaining) [2021-11-21 01:37:38,120 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (35 of 46 remaining) [2021-11-21 01:37:38,120 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (34 of 46 remaining) [2021-11-21 01:37:38,120 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (33 of 46 remaining) [2021-11-21 01:37:38,120 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION (32 of 46 remaining) [2021-11-21 01:37:38,121 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (31 of 46 remaining) [2021-11-21 01:37:38,121 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (30 of 46 remaining) [2021-11-21 01:37:38,121 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (29 of 46 remaining) [2021-11-21 01:37:38,121 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION (28 of 46 remaining) [2021-11-21 01:37:38,122 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION (27 of 46 remaining) [2021-11-21 01:37:38,122 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION (26 of 46 remaining) [2021-11-21 01:37:38,122 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION (25 of 46 remaining) [2021-11-21 01:37:38,122 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION (24 of 46 remaining) [2021-11-21 01:37:38,122 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION (23 of 46 remaining) [2021-11-21 01:37:38,123 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION (22 of 46 remaining) [2021-11-21 01:37:38,123 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION (21 of 46 remaining) [2021-11-21 01:37:38,123 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION (20 of 46 remaining) [2021-11-21 01:37:38,123 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION (19 of 46 remaining) [2021-11-21 01:37:38,124 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION (18 of 46 remaining) [2021-11-21 01:37:38,124 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION (17 of 46 remaining) [2021-11-21 01:37:38,124 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE (16 of 46 remaining) [2021-11-21 01:37:38,124 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE (15 of 46 remaining) [2021-11-21 01:37:38,125 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE (14 of 46 remaining) [2021-11-21 01:37:38,125 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE (13 of 46 remaining) [2021-11-21 01:37:38,125 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE (12 of 46 remaining) [2021-11-21 01:37:38,125 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATION (11 of 46 remaining) [2021-11-21 01:37:38,126 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATION (10 of 46 remaining) [2021-11-21 01:37:38,126 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE (9 of 46 remaining) [2021-11-21 01:37:38,126 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE (8 of 46 remaining) [2021-11-21 01:37:38,126 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE (7 of 46 remaining) [2021-11-21 01:37:38,127 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATION (6 of 46 remaining) [2021-11-21 01:37:38,127 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40REQUIRES_VIOLATION (5 of 46 remaining) [2021-11-21 01:37:38,127 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41REQUIRES_VIOLATION (4 of 46 remaining) [2021-11-21 01:37:38,127 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42REQUIRES_VIOLATION (3 of 46 remaining) [2021-11-21 01:37:38,127 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK (2 of 46 remaining) [2021-11-21 01:37:38,128 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location calloc_modelErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE (1 of 46 remaining) [2021-11-21 01:37:38,128 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location calloc_modelErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE (0 of 46 remaining) [2021-11-21 01:37:38,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-21 01:37:38,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-21 01:37:38,357 INFO L732 BasicCegarLoop]: Path program 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, 1, 1] [2021-11-21 01:37:38,360 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:37:38,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:37:38 BoogieIcfgContainer [2021-11-21 01:37:38,388 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:37:38,389 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:37:38,389 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:37:38,390 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:37:38,390 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:32:38" (3/4) ... [2021-11-21 01:37:38,394 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 01:37:38,394 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:37:38,394 INFO L158 Benchmark]: Toolchain (without parser) took 301202.66ms. Allocated memory was 115.3MB in the beginning and 627.0MB in the end (delta: 511.7MB). Free memory was 73.4MB in the beginning and 219.8MB in the end (delta: -146.3MB). Peak memory consumption was 366.3MB. Max. memory is 16.1GB. [2021-11-21 01:37:38,395 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 115.3MB. Free memory was 91.5MB in the beginning and 91.3MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:37:38,395 INFO L158 Benchmark]: CACSL2BoogieTranslator took 655.35ms. Allocated memory is still 115.3MB. Free memory was 73.2MB in the beginning and 79.4MB in the end (delta: -6.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 01:37:38,395 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.11ms. Allocated memory is still 115.3MB. Free memory was 79.4MB in the beginning and 77.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:37:38,396 INFO L158 Benchmark]: Boogie Preprocessor took 37.01ms. Allocated memory is still 115.3MB. Free memory was 77.1MB in the beginning and 75.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:37:38,396 INFO L158 Benchmark]: RCFGBuilder took 829.94ms. Allocated memory is still 115.3MB. Free memory was 75.2MB in the beginning and 54.8MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-21 01:37:38,404 INFO L158 Benchmark]: TraceAbstraction took 299596.89ms. Allocated memory was 115.3MB in the beginning and 627.0MB in the end (delta: 511.7MB). Free memory was 54.3MB in the beginning and 220.8MB in the end (delta: -166.5MB). Peak memory consumption was 349.2MB. Max. memory is 16.1GB. [2021-11-21 01:37:38,409 INFO L158 Benchmark]: Witness Printer took 4.79ms. Allocated memory is still 627.0MB. Free memory was 220.8MB in the beginning and 219.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:37:38,410 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 115.3MB. Free memory was 91.5MB in the beginning and 91.3MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 655.35ms. Allocated memory is still 115.3MB. Free memory was 73.2MB in the beginning and 79.4MB in the end (delta: -6.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.11ms. Allocated memory is still 115.3MB. Free memory was 79.4MB in the beginning and 77.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.01ms. Allocated memory is still 115.3MB. Free memory was 77.1MB in the beginning and 75.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 829.94ms. Allocated memory is still 115.3MB. Free memory was 75.2MB in the beginning and 54.8MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 299596.89ms. Allocated memory was 115.3MB in the beginning and 627.0MB in the end (delta: 511.7MB). Free memory was 54.3MB in the beginning and 220.8MB in the end (delta: -166.5MB). Peak memory consumption was 349.2MB. Max. memory is 16.1GB. * Witness Printer took 4.79ms. Allocated memory is still 627.0MB. Free memory was 220.8MB in the beginning and 219.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 668]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L687] static struct L1 *list; [L689] CALL l1_insert(&list) [L676] CALL, EXPR calloc_model(1U, sizeof *item) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L676] RET, EXPR calloc_model(1U, sizeof *item) [L676] struct L1 *item = calloc_model(1U, sizeof *item); [L677] COND TRUE !item [L680] CALL l2_insert(&item->l2) [L655] CALL, EXPR calloc_model(1U, sizeof *item) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L655] RET, EXPR calloc_model(1U, sizeof *item) [L655] struct L2 *item = calloc_model(1U, sizeof *item); [L656] COND TRUE !item [L658] item->proto = malloc(119U) [L659] EXPR item->proto [L659] COND TRUE !item->proto [L661] EXPR \read(**list) [L661] item->next = *list [L662] *list = item [L680] RET l2_insert(&item->l2) [L681] COND FALSE !(__VERIFIER_nondet_int()) [L682] EXPR \read(**list) [L682] item->next = *list [L683] *list = item [L689] RET l1_insert(&list) [L690] COND FALSE !(__VERIFIER_nondet_int()) [L692] EXPR \read(*list) [L692] EXPR list->next [L692] struct L1 *next = list->next; [L693] EXPR \read(*list) [L693] EXPR list->l2 [L693] CALL l2_destroy(list->l2) [L667] EXPR list->next [L667] struct L2 *next = list->next; [L668] EXPR list->proto [L668] free(list->proto) - UnprovableResult [Line: 658]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 658]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 659]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 659]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 661]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 661]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 661]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 661]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 662]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 662]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 682]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 682]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 682]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 682]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 683]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 683]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 692]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 692]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 692]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 692]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 667]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 667]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 668]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 668]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 668]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 668]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 669]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 669]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 669]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 697]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 697]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 685]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 91 locations, 46 error locations. Started 1 CEGAR loops. OverallTime: 299.5s, OverallIterations: 29, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 18.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 1904 SdHoareTripleChecker+Valid, 10.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1896 mSDsluCounter, 5580 SdHoareTripleChecker+Invalid, 8.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2266 IncrementalHoareTripleChecker+Unchecked, 4200 mSDsCounter, 136 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5542 IncrementalHoareTripleChecker+Invalid, 7945 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 136 mSolverCounterUnsat, 1535 mSDtfsCounter, 5542 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1193 GetRequests, 695 SyntacticMatches, 13 SemanticMatches, 485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3936 ImplicationChecksByTransitivity, 77.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=24, InterpolantAutomatonStates: 290, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 28 MinimizatonAttempts, 345 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 97.2s InterpolantComputationTime, 710 NumberOfCodeBlocks, 709 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 829 ConstructedInterpolants, 130 QuantifiedInterpolants, 10119 SizeOfPredicates, 287 NumberOfNonLiveVariables, 6370 ConjunctsInSsa, 841 ConjunctsInUnsatCore, 36 InterpolantComputations, 17 PerfectInterpolantSequences, 192/284 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 54.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 10, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 115, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 140, TOOLS_POST_TIME: 50.0s, TOOLS_POST_CALL_APPLICATIONS: 27, TOOLS_POST_CALL_TIME: 2.1s, TOOLS_POST_RETURN_APPLICATIONS: 18, TOOLS_POST_RETURN_TIME: 1.5s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 185, TOOLS_QUANTIFIERELIM_TIME: 53.5s, TOOLS_QUANTIFIERELIM_MAX_TIME: 2.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 357, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 20, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 16, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 24, DOMAIN_ISSUBSETEQ_TIME: 0.3s, DOMAIN_ISBOTTOM_APPLICATIONS: 115, DOMAIN_ISBOTTOM_TIME: 0.3s, LOOP_SUMMARIZER_APPLICATIONS: 8, LOOP_SUMMARIZER_CACHE_MISSES: 8, LOOP_SUMMARIZER_OVERALL_TIME: 15.9s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 15.9s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 24, CALL_SUMMARIZER_APPLICATIONS: 18, CALL_SUMMARIZER_CACHE_MISSES: 5, CALL_SUMMARIZER_OVERALL_TIME: 8.6s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 8.6s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 1567, DAG_COMPRESSION_RETAINED_NODES: 306, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-21 01:37:38,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0219.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4a489d3e73f8fa53a32414f65b592ba5db703c103e5e16e188592c7c2dfeab95 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:37:41,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:37:41,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:37:41,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:37:41,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:37:41,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:37:41,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:37:41,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:37:41,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:37:41,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:37:41,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:37:41,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:37:41,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:37:41,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:37:41,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:37:41,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:37:41,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:37:41,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:37:41,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:37:41,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:37:41,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:37:41,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:37:41,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:37:41,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:37:41,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:37:41,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:37:41,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:37:41,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:37:41,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:37:41,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:37:41,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:37:41,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:37:41,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:37:41,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:37:41,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:37:41,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:37:41,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:37:41,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:37:41,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:37:41,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:37:41,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:37:41,494 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-21 01:37:41,558 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:37:41,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:37:41,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:37:41,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:37:41,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:37:41,561 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:37:41,561 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:37:41,561 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:37:41,562 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:37:41,563 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:37:41,564 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:37:41,564 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:37:41,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:37:41,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:37:41,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:37:41,567 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:37:41,567 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:37:41,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:37:41,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:37:41,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:37:41,568 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:37:41,569 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:37:41,569 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:37:41,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:37:41,569 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:37:41,570 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:37:41,570 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:37:41,570 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:37:41,571 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:37:41,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:37:41,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:37:41,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:37:41,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:37:41,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:37:41,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:37:41,573 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:37:41,573 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:37:41,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:37:41,574 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:37:41,574 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a489d3e73f8fa53a32414f65b592ba5db703c103e5e16e188592c7c2dfeab95 [2021-11-21 01:37:42,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:37:42,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:37:42,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:37:42,104 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:37:42,105 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:37:42,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/memsafety/test-0219.i [2021-11-21 01:37:42,194 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/data/e9e8df44a/3ee4bb0b132847eda7c2429902e47a33/FLAGae8e2d501 [2021-11-21 01:37:42,873 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:37:42,874 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/sv-benchmarks/c/memsafety/test-0219.i [2021-11-21 01:37:42,899 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/data/e9e8df44a/3ee4bb0b132847eda7c2429902e47a33/FLAGae8e2d501 [2021-11-21 01:37:43,133 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/data/e9e8df44a/3ee4bb0b132847eda7c2429902e47a33 [2021-11-21 01:37:43,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:37:43,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:37:43,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:37:43,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:37:43,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:37:43,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:37:43" (1/1) ... [2021-11-21 01:37:43,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4877121a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:37:43, skipping insertion in model container [2021-11-21 01:37:43,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:37:43" (1/1) ... [2021-11-21 01:37:43,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:37:43,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:37:43,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:37:43,808 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:37:43,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:37:43,971 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:37:43,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:37:43 WrapperNode [2021-11-21 01:37:43,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:37:43,974 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:37:43,974 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:37:43,974 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:37:43,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:37:43" (1/1) ... [2021-11-21 01:37:44,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:37:43" (1/1) ... [2021-11-21 01:37:44,079 INFO L137 Inliner]: procedures = 181, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 112 [2021-11-21 01:37:44,079 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:37:44,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:37:44,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:37:44,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:37:44,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:37:43" (1/1) ... [2021-11-21 01:37:44,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:37:43" (1/1) ... [2021-11-21 01:37:44,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:37:43" (1/1) ... [2021-11-21 01:37:44,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:37:43" (1/1) ... [2021-11-21 01:37:44,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:37:43" (1/1) ... [2021-11-21 01:37:44,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:37:43" (1/1) ... [2021-11-21 01:37:44,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:37:43" (1/1) ... [2021-11-21 01:37:44,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:37:44,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:37:44,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:37:44,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:37:44,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:37:43" (1/1) ... [2021-11-21 01:37:44,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:37:44,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:37:44,223 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:37:44,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:37:44,276 INFO L130 BoogieDeclarations]: Found specification of procedure calloc_model [2021-11-21 01:37:44,276 INFO L138 BoogieDeclarations]: Found implementation of procedure calloc_model [2021-11-21 01:37:44,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:37:44,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:37:44,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:37:44,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:37:44,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:37:44,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:37:44,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 01:37:44,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:37:44,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:37:44,413 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:37:44,415 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:37:45,107 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:37:45,115 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:37:45,116 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-21 01:37:45,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:37:45 BoogieIcfgContainer [2021-11-21 01:37:45,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:37:45,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:37:45,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:37:45,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:37:45,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:37:43" (1/3) ... [2021-11-21 01:37:45,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d925c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:37:45, skipping insertion in model container [2021-11-21 01:37:45,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:37:43" (2/3) ... [2021-11-21 01:37:45,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d925c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:37:45, skipping insertion in model container [2021-11-21 01:37:45,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:37:45" (3/3) ... [2021-11-21 01:37:45,128 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0219.i [2021-11-21 01:37:45,135 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:37:45,135 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2021-11-21 01:37:45,231 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:37:45,248 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-21 01:37:45,248 INFO L340 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2021-11-21 01:37:45,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 57 states have (on average 2.017543859649123) internal successors, (115), 103 states have internal predecessors, (115), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:37:45,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 01:37:45,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:45,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 01:37:45,289 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:37:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:45,299 INFO L85 PathProgramCache]: Analyzing trace with hash 928008, now seen corresponding path program 1 times [2021-11-21 01:37:45,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:37:45,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350389639] [2021-11-21 01:37:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:45,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:37:45,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:37:45,321 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:37:45,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:37:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:45,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 01:37:45,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:45,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:45,477 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:37:45,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350389639] [2021-11-21 01:37:45,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350389639] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:37:45,479 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:37:45,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:37:45,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917608109] [2021-11-21 01:37:45,483 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:37:45,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:37:45,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:37:45,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:37:45,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:37:45,534 INFO L87 Difference]: Start difference. First operand has 107 states, 57 states have (on average 2.017543859649123) internal successors, (115), 103 states have internal predecessors, (115), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-21 01:37:45,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:45,569 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2021-11-21 01:37:45,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:37:45,571 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-11-21 01:37:45,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:45,584 INFO L225 Difference]: With dead ends: 107 [2021-11-21 01:37:45,584 INFO L226 Difference]: Without dead ends: 105 [2021-11-21 01:37:45,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:37:45,592 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:45,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:37:45,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-21 01:37:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-11-21 01:37:45,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 56 states have (on average 1.8928571428571428) internal successors, (106), 101 states have internal predecessors, (106), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:37:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2021-11-21 01:37:45,670 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 4 [2021-11-21 01:37:45,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:45,670 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2021-11-21 01:37:45,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-21 01:37:45,672 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2021-11-21 01:37:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:37:45,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:45,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:37:45,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:37:45,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:37:45,894 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting calloc_modelErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:37:45,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:45,895 INFO L85 PathProgramCache]: Analyzing trace with hash 889698825, now seen corresponding path program 1 times [2021-11-21 01:37:45,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:37:45,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366383873] [2021-11-21 01:37:45,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:45,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:37:45,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:37:45,902 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:37:45,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:37:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:46,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:37:46,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:46,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:37:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:46,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:46,175 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:37:46,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366383873] [2021-11-21 01:37:46,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366383873] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:37:46,177 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:37:46,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:37:46,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359255169] [2021-11-21 01:37:46,183 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:37:46,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:37:46,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:37:46,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:37:46,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:37:46,192 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:37:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:46,457 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-11-21 01:37:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:37:46,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 01:37:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:46,460 INFO L225 Difference]: With dead ends: 104 [2021-11-21 01:37:46,461 INFO L226 Difference]: Without dead ends: 104 [2021-11-21 01:37:46,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:37:46,463 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:46,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 159 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:37:46,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-21 01:37:46,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-11-21 01:37:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 56 states have (on average 1.875) internal successors, (105), 100 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:37:46,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-11-21 01:37:46,493 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 6 [2021-11-21 01:37:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:46,494 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-11-21 01:37:46,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:37:46,496 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-11-21 01:37:46,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:37:46,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:46,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:37:46,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:37:46,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:37:46,710 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting calloc_modelErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:37:46,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:46,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1810859990, now seen corresponding path program 1 times [2021-11-21 01:37:46,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:37:46,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153034658] [2021-11-21 01:37:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:46,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:37:46,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:37:46,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:37:46,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:37:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:46,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:37:46,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:46,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:37:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:46,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:47,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:37:47,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153034658] [2021-11-21 01:37:47,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153034658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:37:47,145 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:37:47,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [] total 4 [2021-11-21 01:37:47,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908272252] [2021-11-21 01:37:47,145 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:37:47,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:37:47,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:37:47,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:37:47,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:37:47,150 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:37:47,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:47,691 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2021-11-21 01:37:47,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:37:47,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 01:37:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:47,704 INFO L225 Difference]: With dead ends: 103 [2021-11-21 01:37:47,704 INFO L226 Difference]: Without dead ends: 103 [2021-11-21 01:37:47,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:37:47,706 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 17 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:47,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 260 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:37:47,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-21 01:37:47,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-21 01:37:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 56 states have (on average 1.8571428571428572) internal successors, (104), 99 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:37:47,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2021-11-21 01:37:47,717 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 7 [2021-11-21 01:37:47,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:47,718 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2021-11-21 01:37:47,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:37:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2021-11-21 01:37:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 01:37:47,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:47,720 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:37:47,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:37:47,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:37:47,934 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:37:47,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:47,935 INFO L85 PathProgramCache]: Analyzing trace with hash 994596048, now seen corresponding path program 1 times [2021-11-21 01:37:47,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:37:47,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686123702] [2021-11-21 01:37:47,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:47,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:37:47,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:37:47,937 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:37:47,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 01:37:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:48,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:37:48,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:48,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:37:49,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:37:49,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686123702] [2021-11-21 01:37:49,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686123702] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:37:49,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:37:49,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-21 01:37:49,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395655116] [2021-11-21 01:37:49,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:37:49,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:37:49,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:37:49,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:37:49,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:37:49,074 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:37:49,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:49,334 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2021-11-21 01:37:49,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:37:49,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-21 01:37:49,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:49,339 INFO L225 Difference]: With dead ends: 107 [2021-11-21 01:37:49,339 INFO L226 Difference]: Without dead ends: 104 [2021-11-21 01:37:49,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:37:49,341 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 8 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:49,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 400 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:37:49,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-21 01:37:49,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-11-21 01:37:49,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 57 states have (on average 1.8421052631578947) internal successors, (105), 100 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:37:49,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-11-21 01:37:49,370 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 26 [2021-11-21 01:37:49,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:49,371 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-11-21 01:37:49,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:37:49,371 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-11-21 01:37:49,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 01:37:49,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:49,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:37:49,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-21 01:37:49,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:37:49,573 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:37:49,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:49,574 INFO L85 PathProgramCache]: Analyzing trace with hash -207095898, now seen corresponding path program 1 times [2021-11-21 01:37:49,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:37:49,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867141677] [2021-11-21 01:37:49,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:49,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:37:49,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:37:49,582 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:37:49,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 01:37:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:49,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:37:49,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:37:50,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:37:50,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:37:50,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867141677] [2021-11-21 01:37:50,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867141677] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:37:50,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1931692317] [2021-11-21 01:37:50,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:50,933 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:37:50,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:37:50,936 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:37:50,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-21 01:37:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:51,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:37:51,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:37:51,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:37:51,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1931692317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:37:51,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407731791] [2021-11-21 01:37:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:51,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:37:51,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:37:51,829 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:37:51,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:37:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:51,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:37:51,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:37:52,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:37:52,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407731791] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:37:52,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:37:52,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-21 01:37:52,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364566734] [2021-11-21 01:37:52,609 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:37:52,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:37:52,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:37:52,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:37:52,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:37:52,611 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 01:37:53,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:53,319 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2021-11-21 01:37:53,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:37:53,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-11-21 01:37:53,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:53,322 INFO L225 Difference]: With dead ends: 113 [2021-11-21 01:37:53,322 INFO L226 Difference]: Without dead ends: 107 [2021-11-21 01:37:53,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:37:53,324 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 28 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:53,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 503 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:37:53,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-21 01:37:53,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-21 01:37:53,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 60 states have (on average 1.8) internal successors, (108), 103 states have internal predecessors, (108), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:37:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-11-21 01:37:53,335 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 28 [2021-11-21 01:37:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:53,336 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-11-21 01:37:53,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 01:37:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-11-21 01:37:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:37:53,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:53,338 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:37:53,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:37:53,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:37:53,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:37:53,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:37:53,948 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:37:53,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:53,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1791280848, now seen corresponding path program 2 times [2021-11-21 01:37:53,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:37:53,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573013222] [2021-11-21 01:37:53,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:37:53,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:37:53,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:37:53,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:37:53,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 01:37:54,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-21 01:37:54,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:37:54,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:37:54,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:54,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:37:54,225 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-21 01:37:54,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2021-11-21 01:37:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 01:37:54,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 01:37:54,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:37:54,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573013222] [2021-11-21 01:37:54,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573013222] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:37:54,469 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:37:54,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-21 01:37:54,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503656691] [2021-11-21 01:37:54,470 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:37:54,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:37:54,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:37:54,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:37:54,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:37:54,471 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:37:54,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:54,975 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2021-11-21 01:37:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:37:54,976 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2021-11-21 01:37:54,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:54,979 INFO L225 Difference]: With dead ends: 134 [2021-11-21 01:37:54,979 INFO L226 Difference]: Without dead ends: 134 [2021-11-21 01:37:54,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:37:54,981 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 60 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:54,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 269 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:37:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-21 01:37:55,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 104. [2021-11-21 01:37:55,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.75) internal successors, (105), 100 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:37:55,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-11-21 01:37:55,018 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 34 [2021-11-21 01:37:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:55,019 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-11-21 01:37:55,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:37:55,019 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-11-21 01:37:55,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:37:55,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:55,024 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:37:55,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:37:55,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:37:55,225 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:37:55,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:55,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1791280849, now seen corresponding path program 1 times [2021-11-21 01:37:55,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:37:55,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691888651] [2021-11-21 01:37:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:55,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:37:55,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:37:55,231 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:37:55,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-21 01:37:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:55,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:37:55,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:37:56,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:37:57,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:37:57,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691888651] [2021-11-21 01:37:57,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691888651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:37:57,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1194645737] [2021-11-21 01:37:57,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:57,621 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:37:57,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:37:57,637 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:37:57,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-21 01:37:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:57,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:37:57,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:37:58,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:37:58,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1194645737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:37:58,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833059637] [2021-11-21 01:37:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:58,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:37:58,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:37:58,961 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:37:58,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:37:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:59,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:37:59,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:38:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:38:00,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:38:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:38:01,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833059637] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:38:01,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:38:01,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 23 [2021-11-21 01:38:01,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541673312] [2021-11-21 01:38:01,374 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:38:01,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 01:38:01,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:38:01,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 01:38:01,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:38:01,377 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:38:04,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:04,301 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2021-11-21 01:38:04,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:38:04,302 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-11-21 01:38:04,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:04,304 INFO L225 Difference]: With dead ends: 116 [2021-11-21 01:38:04,304 INFO L226 Difference]: Without dead ends: 110 [2021-11-21 01:38:04,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=289, Invalid=641, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:38:04,306 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 50 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:04,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1265 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:38:04,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-21 01:38:04,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-11-21 01:38:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.696969696969697) internal successors, (112), 106 states have internal predecessors, (112), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:38:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2021-11-21 01:38:04,315 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 34 [2021-11-21 01:38:04,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:04,315 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2021-11-21 01:38:04,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:38:04,316 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2021-11-21 01:38:04,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-21 01:38:04,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:04,318 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:04,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:38:04,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:38:04,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:38:04,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:38:04,921 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:38:04,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:04,922 INFO L85 PathProgramCache]: Analyzing trace with hash 896137425, now seen corresponding path program 2 times [2021-11-21 01:38:04,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:38:04,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539670871] [2021-11-21 01:38:04,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:38:04,923 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:38:04,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:38:04,927 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:38:04,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-21 01:38:05,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:38:05,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:38:05,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:38:05,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:38:05,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:38:05,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:38:06,783 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:38:06,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-21 01:38:06,793 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:38:06,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-21 01:38:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-21 01:38:06,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:38:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-21 01:38:11,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:38:11,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539670871] [2021-11-21 01:38:11,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539670871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:11,560 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:11,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-21 01:38:11,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788894742] [2021-11-21 01:38:11,560 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:11,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:38:11,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:38:11,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:38:11,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=103, Unknown=1, NotChecked=0, Total=132 [2021-11-21 01:38:11,562 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:38:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:14,799 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2021-11-21 01:38:14,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:38:14,803 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2021-11-21 01:38:14,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:14,805 INFO L225 Difference]: With dead ends: 112 [2021-11-21 01:38:14,805 INFO L226 Difference]: Without dead ends: 112 [2021-11-21 01:38:14,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=34, Invalid=121, Unknown=1, NotChecked=0, Total=156 [2021-11-21 01:38:14,806 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 84 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:14,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 404 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 307 Unchecked, 3.0s Time] [2021-11-21 01:38:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-21 01:38:14,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-11-21 01:38:14,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 66 states have (on average 1.6818181818181819) internal successors, (111), 105 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:38:14,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2021-11-21 01:38:14,815 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 42 [2021-11-21 01:38:14,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:14,815 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2021-11-21 01:38:14,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:38:14,816 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2021-11-21 01:38:14,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 01:38:14,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:14,818 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:14,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:38:15,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:38:15,043 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:38:15,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:15,043 INFO L85 PathProgramCache]: Analyzing trace with hash -2100362030, now seen corresponding path program 1 times [2021-11-21 01:38:15,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:38:15,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149454836] [2021-11-21 01:38:15,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:15,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:38:15,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:38:15,045 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:38:15,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-21 01:38:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:15,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:38:15,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:38:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-21 01:38:15,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:38:15,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-21 01:38:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-21 01:38:16,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:38:16,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149454836] [2021-11-21 01:38:16,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149454836] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:16,021 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:16,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-21 01:38:16,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268225311] [2021-11-21 01:38:16,022 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:16,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:38:16,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:38:16,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:38:16,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:38:16,023 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:38:17,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:17,088 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2021-11-21 01:38:17,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:38:17,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-11-21 01:38:17,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:17,091 INFO L225 Difference]: With dead ends: 114 [2021-11-21 01:38:17,091 INFO L226 Difference]: Without dead ends: 114 [2021-11-21 01:38:17,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:38:17,092 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 90 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:17,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 407 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:38:17,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-21 01:38:17,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2021-11-21 01:38:17,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 104 states have internal predecessors, (110), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:38:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2021-11-21 01:38:17,096 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 44 [2021-11-21 01:38:17,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:17,097 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2021-11-21 01:38:17,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:38:17,097 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2021-11-21 01:38:17,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 01:38:17,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:17,098 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:17,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:38:17,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:38:17,299 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:38:17,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:17,299 INFO L85 PathProgramCache]: Analyzing trace with hash 186717587, now seen corresponding path program 1 times [2021-11-21 01:38:17,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:38:17,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528067777] [2021-11-21 01:38:17,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:17,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:38:17,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:38:17,301 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:38:17,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-21 01:38:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:17,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:38:17,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:38:17,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:38:18,081 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:38:18,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2021-11-21 01:38:18,281 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-21 01:38:18,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 51 [2021-11-21 01:38:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 1 proven. 86 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-21 01:38:18,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:38:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 1 proven. 86 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-21 01:38:56,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:38:56,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528067777] [2021-11-21 01:38:56,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528067777] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:38:56,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1826054282] [2021-11-21 01:38:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:56,726 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:38:56,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:38:56,732 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:38:56,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-21 01:38:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:57,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:38:57,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:38:57,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:39:01,436 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-21 01:39:01,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2021-11-21 01:39:01,645 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-21 01:39:01,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 50 [2021-11-21 01:39:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-21 01:39:01,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:39:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 1 proven. 86 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-21 01:39:21,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1826054282] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:39:21,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:39:21,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9, 9, 12] total 27 [2021-11-21 01:39:21,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478089980] [2021-11-21 01:39:21,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:39:21,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:39:21,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:39:21,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:39:21,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=625, Unknown=21, NotChecked=0, Total=756 [2021-11-21 01:39:21,125 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:39:24,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:39:24,594 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2021-11-21 01:39:24,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 01:39:24,594 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2021-11-21 01:39:24,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:39:24,596 INFO L225 Difference]: With dead ends: 150 [2021-11-21 01:39:24,596 INFO L226 Difference]: Without dead ends: 150 [2021-11-21 01:39:24,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 142 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 62.9s TimeCoverageRelationStatistics Valid=151, Invalid=819, Unknown=22, NotChecked=0, Total=992 [2021-11-21 01:39:24,597 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 90 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:39:24,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 440 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 394 Invalid, 0 Unknown, 66 Unchecked, 0.8s Time] [2021-11-21 01:39:24,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-21 01:39:24,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 117. [2021-11-21 01:39:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 75 states have (on average 1.5866666666666667) internal successors, (119), 112 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:39:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 125 transitions. [2021-11-21 01:39:24,603 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 125 transitions. Word has length 46 [2021-11-21 01:39:24,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:39:24,604 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 125 transitions. [2021-11-21 01:39:24,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:39:24,604 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 125 transitions. [2021-11-21 01:39:24,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 01:39:24,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:24,606 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:39:24,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:39:24,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:39:25,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:39:25,017 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:39:25,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:25,017 INFO L85 PathProgramCache]: Analyzing trace with hash 186717588, now seen corresponding path program 1 times [2021-11-21 01:39:25,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:39:25,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717568958] [2021-11-21 01:39:25,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:25,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:39:25,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:39:25,019 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:39:25,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-21 01:39:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:25,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:39:25,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:25,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:39:25,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:39:29,508 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-21 01:39:29,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2021-11-21 01:39:29,544 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:39:29,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2021-11-21 01:39:33,220 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-21 01:39:33,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 36 [2021-11-21 01:39:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 1 proven. 86 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-21 01:39:35,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:39:41,904 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|)) (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|) (select (store |c_#length| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6|)))) (exists ((|v_calloc_model_~ptr~0#1.base_93| (_ BitVec 32))) (and (or (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_92| (_ BitVec 32)) (|v_calloc_model_~size#1_92| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|) (select (store (store |c_old(#length)| |v_calloc_model_~ptr~0#1.base_93| (bvmul |v_calloc_model_~nmemb#1_92| |v_calloc_model_~size#1_92|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6|)))) (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_calloc_model_~ptr~0#1.base_93|))))))) is different from false [2021-11-21 01:39:59,914 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_calloc_model_~ptr~0#1.base_94| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|)) (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_93| (_ BitVec 32)) (|v_calloc_model_~size#1_93| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|) (select (store (store |c_#length| |v_calloc_model_~ptr~0#1.base_94| (bvmul |v_calloc_model_~nmemb#1_93| |v_calloc_model_~size#1_93|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6|)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_calloc_model_~ptr~0#1.base_94|)))) (exists ((|v_calloc_model_~ptr~0#1.base_93| (_ BitVec 32))) (and (or (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_92| (_ BitVec 32)) (|v_calloc_model_~size#1_92| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|) (select (store (store |c_old(#length)| |v_calloc_model_~ptr~0#1.base_93| (bvmul |v_calloc_model_~nmemb#1_92| |v_calloc_model_~size#1_92|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6|)))) (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_calloc_model_~ptr~0#1.base_93|))))))) is different from false [2021-11-21 01:40:01,920 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_calloc_model_~ptr~0#1.base_94| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|)) (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_93| (_ BitVec 32)) (|v_calloc_model_~size#1_93| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|) (select (store (store |c_#length| |v_calloc_model_~ptr~0#1.base_94| (bvmul |v_calloc_model_~nmemb#1_93| |v_calloc_model_~size#1_93|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6|)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_calloc_model_~ptr~0#1.base_94|)))) (exists ((|v_calloc_model_~ptr~0#1.base_93| (_ BitVec 32))) (and (or (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_92| (_ BitVec 32)) (|v_calloc_model_~size#1_92| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|) (select (store (store |c_old(#length)| |v_calloc_model_~ptr~0#1.base_93| (bvmul |v_calloc_model_~nmemb#1_92| |v_calloc_model_~size#1_92|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6|)))) (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_calloc_model_~ptr~0#1.base_93|))))))) is different from true [2021-11-21 01:40:12,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-11-21 01:40:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 86 not checked. [2021-11-21 01:40:12,586 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:40:12,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717568958] [2021-11-21 01:40:12,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717568958] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:12,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [594370845] [2021-11-21 01:40:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:12,587 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:40:12,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:40:12,587 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:40:12,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-21 01:40:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:13,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 01:40:13,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:13,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:40:13,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:40:16,045 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-21 01:40:16,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-11-21 01:40:16,122 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:40:16,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:40:16,710 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-21 01:40:16,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 36 [2021-11-21 01:40:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 1 proven. 86 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-21 01:40:20,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:28,096 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|)) (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|) (select (store |c_#length| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8|)))) (exists ((|v_calloc_model_~ptr~0#1.base_93| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|))) (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_92| (_ BitVec 32)) (|v_calloc_model_~size#1_92| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|) (select (store (store |c_old(#length)| |v_calloc_model_~ptr~0#1.base_93| (bvmul |v_calloc_model_~nmemb#1_92| |v_calloc_model_~size#1_92|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_calloc_model_~ptr~0#1.base_93|))))))) is different from false [2021-11-21 01:40:30,102 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|)) (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|) (select (store |c_#length| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8|)))) (exists ((|v_calloc_model_~ptr~0#1.base_93| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|))) (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_92| (_ BitVec 32)) (|v_calloc_model_~size#1_92| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|) (select (store (store |c_old(#length)| |v_calloc_model_~ptr~0#1.base_93| (bvmul |v_calloc_model_~nmemb#1_92| |v_calloc_model_~size#1_92|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_calloc_model_~ptr~0#1.base_93|))))))) is different from true [2021-11-21 01:40:47,944 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_calloc_model_~ptr~0#1.base_102| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|)) (forall ((|v_calloc_model_~nmemb#1_101| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~size#1_101| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|) (select (store (store |c_#length| |v_calloc_model_~ptr~0#1.base_102| (bvmul |v_calloc_model_~nmemb#1_101| |v_calloc_model_~size#1_101|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8|)))) (not (= (_ bv0 1) (select |c_#valid| |v_calloc_model_~ptr~0#1.base_102|))) (exists ((|v_calloc_model_~ptr~0#1.base_93| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|))) (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_92| (_ BitVec 32)) (|v_calloc_model_~size#1_92| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|) (select (store (store |c_old(#length)| |v_calloc_model_~ptr~0#1.base_93| (bvmul |v_calloc_model_~nmemb#1_92| |v_calloc_model_~size#1_92|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_calloc_model_~ptr~0#1.base_93|))))))) is different from false [2021-11-21 01:40:49,950 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_calloc_model_~ptr~0#1.base_102| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|)) (forall ((|v_calloc_model_~nmemb#1_101| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~size#1_101| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|) (select (store (store |c_#length| |v_calloc_model_~ptr~0#1.base_102| (bvmul |v_calloc_model_~nmemb#1_101| |v_calloc_model_~size#1_101|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8|)))) (not (= (_ bv0 1) (select |c_#valid| |v_calloc_model_~ptr~0#1.base_102|))) (exists ((|v_calloc_model_~ptr~0#1.base_93| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|))) (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_92| (_ BitVec 32)) (|v_calloc_model_~size#1_92| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|) (select (store (store |c_old(#length)| |v_calloc_model_~ptr~0#1.base_93| (bvmul |v_calloc_model_~nmemb#1_92| |v_calloc_model_~size#1_92|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_calloc_model_~ptr~0#1.base_93|))))))) is different from true [2021-11-21 01:40:53,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2021-11-21 01:40:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 86 not checked. [2021-11-21 01:40:53,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [594370845] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:53,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376059413] [2021-11-21 01:40:53,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:53,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:40:53,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:40:53,985 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:40:53,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 01:40:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:54,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-21 01:40:54,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:54,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:40:59,312 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:40:59,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 38 [2021-11-21 01:40:59,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-21 01:41:00,564 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-21 01:41:00,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 58 [2021-11-21 01:41:00,599 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:41:00,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-11-21 01:41:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 1 proven. 86 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-21 01:41:01,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:24,805 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| .cse0) (bvule .cse0 (select (store |c_#length| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10|)))) (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|))) (exists ((|v_calloc_model_~size#1_108| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_108| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|) (select (store (store |c_old(#length)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (bvmul |v_calloc_model_~nmemb#1_108| |v_calloc_model_~size#1_108|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10|))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65|)))) (= (_ bv0 1) (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (_ bv1 1)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36|)))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36|))))) is different from false [2021-11-21 01:43:10,026 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_calloc_model_#Ultimate.C_memset_#ptr#1.base_115| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select (store |c_#valid| |v_calloc_model_#Ultimate.C_memset_#ptr#1.base_115| (_ bv1 1)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36|)))) (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|))) (exists ((|v_calloc_model_~size#1_108| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_108| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|) (select (store (store |c_old(#length)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (bvmul |v_calloc_model_~nmemb#1_108| |v_calloc_model_~size#1_108|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10|))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65|)))) (= (_ bv0 1) (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (_ bv1 1)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36|)))))) (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|)) (forall ((|v_calloc_model_~nmemb#1_109| (_ BitVec 32)) (|v_calloc_model_~size#1_109| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|) (select (store (store |c_#length| |v_calloc_model_#Ultimate.C_memset_#ptr#1.base_115| (bvmul |v_calloc_model_~nmemb#1_109| |v_calloc_model_~size#1_109|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10|)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_calloc_model_#Ultimate.C_memset_#ptr#1.base_115|)))))) is different from true [2021-11-21 01:43:32,938 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-11-21 01:43:32,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 50 [2021-11-21 01:43:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 85 not checked. [2021-11-21 01:43:35,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376059413] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:43:35,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:43:35,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 10, 14, 12] total 39 [2021-11-21 01:43:35,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467277769] [2021-11-21 01:43:35,549 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:43:35,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-21 01:43:35,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:43:35,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-21 01:43:35,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=988, Unknown=21, NotChecked=414, Total=1560 [2021-11-21 01:43:35,552 INFO L87 Difference]: Start difference. First operand 117 states and 125 transitions. Second operand has 40 states, 36 states have (on average 2.75) internal successors, (99), 32 states have internal predecessors, (99), 4 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 01:43:39,029 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) |c_calloc_model_~ptr~0#1.offset|) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |c_calloc_model_~ptr~0#1.base|))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |c_#valid| |c_calloc_model_~ptr~0#1.base|)))) (= (store |c_old(#valid)| |c_calloc_model_~ptr~0#1.base| (_ bv1 1)) |c_#valid|) (= (bvmul |c_calloc_model_#in~nmemb#1| |c_calloc_model_#in~size#1|) (select |c_#length| |c_calloc_model_~ptr~0#1.base|)) (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| .cse0) (bvule .cse0 (select (store |c_#length| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10|)))) (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|))) (exists ((|v_calloc_model_~size#1_108| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_108| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|) (select (store (store |c_old(#length)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (bvmul |v_calloc_model_~nmemb#1_108| |v_calloc_model_~size#1_108|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10|))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65|)))) (= (_ bv0 1) (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (_ bv1 1)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36|)))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36|))))) (exists ((|calloc_model_~size#1| (_ BitVec 32)) (|calloc_model_~nmemb#1| (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |c_calloc_model_~ptr~0#1.base| (bvmul |calloc_model_~nmemb#1| |calloc_model_~size#1|))))) is different from false [2021-11-21 01:43:41,071 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |c_calloc_model_#res#1.base|))) (_ bv1 1))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |c_calloc_model_#res#1.base|)))) (= (store |c_old(#valid)| |c_calloc_model_#res#1.base| (_ bv1 1)) |c_#valid|) (= |c_calloc_model_#res#1.offset| (_ bv0 32)) (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| .cse0) (bvule .cse0 (select (store |c_#length| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10|)))) (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|))) (exists ((|v_calloc_model_~size#1_108| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_108| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|) (select (store (store |c_old(#length)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (bvmul |v_calloc_model_~nmemb#1_108| |v_calloc_model_~size#1_108|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10|))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65|)))) (= (_ bv0 1) (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (_ bv1 1)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36|)))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36|))))) (exists ((|calloc_model_~size#1| (_ BitVec 32)) (|calloc_model_~nmemb#1| (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |c_calloc_model_#res#1.base| (bvmul |calloc_model_~nmemb#1| |calloc_model_~size#1|)))) (= (select |c_#length| |c_calloc_model_#res#1.base|) (bvmul |c_calloc_model_#in~nmemb#1| |c_calloc_model_#in~size#1|))) is different from false [2021-11-21 01:43:43,648 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_calloc_model_~ptr~0#1.base_102| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|)) (forall ((|v_calloc_model_~nmemb#1_101| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~size#1_101| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|) (select (store (store |c_#length| |v_calloc_model_~ptr~0#1.base_102| (bvmul |v_calloc_model_~nmemb#1_101| |v_calloc_model_~size#1_101|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8|)))) (not (= (_ bv0 1) (select |c_#valid| |v_calloc_model_~ptr~0#1.base_102|))) (exists ((|v_calloc_model_~ptr~0#1.base_93| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|))) (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_92| (_ BitVec 32)) (|v_calloc_model_~size#1_92| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|) (select (store (store |c_old(#length)| |v_calloc_model_~ptr~0#1.base_93| (bvmul |v_calloc_model_~nmemb#1_92| |v_calloc_model_~size#1_92|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_calloc_model_~ptr~0#1.base_93|))))))) (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_calloc_model_#Ultimate.C_memset_#ptr#1.base_115| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select (store |c_#valid| |v_calloc_model_#Ultimate.C_memset_#ptr#1.base_115| (_ bv1 1)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36|)))) (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|))) (exists ((|v_calloc_model_~size#1_108| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_108| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|) (select (store (store |c_old(#length)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (bvmul |v_calloc_model_~nmemb#1_108| |v_calloc_model_~size#1_108|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10|))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65|)))) (= (_ bv0 1) (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (_ bv1 1)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36|)))))) (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|)) (forall ((|v_calloc_model_~nmemb#1_109| (_ BitVec 32)) (|v_calloc_model_~size#1_109| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|) (select (store (store |c_#length| |v_calloc_model_#Ultimate.C_memset_#ptr#1.base_115| (bvmul |v_calloc_model_~nmemb#1_109| |v_calloc_model_~size#1_109|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10|)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_calloc_model_#Ultimate.C_memset_#ptr#1.base_115|)))))) (= |c_old(#valid)| |c_#valid|) (= |c_#length| |c_old(#length)|) (forall ((|v_calloc_model_~ptr~0#1.base_94| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|)) (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_93| (_ BitVec 32)) (|v_calloc_model_~size#1_93| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|) (select (store (store |c_#length| |v_calloc_model_~ptr~0#1.base_94| (bvmul |v_calloc_model_~nmemb#1_93| |v_calloc_model_~size#1_93|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6|)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_calloc_model_~ptr~0#1.base_94|)))) (exists ((|v_calloc_model_~ptr~0#1.base_93| (_ BitVec 32))) (and (or (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_92| (_ BitVec 32)) (|v_calloc_model_~size#1_92| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|) (select (store (store |c_old(#length)| |v_calloc_model_~ptr~0#1.base_93| (bvmul |v_calloc_model_~nmemb#1_92| |v_calloc_model_~size#1_92|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6|)))) (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_calloc_model_~ptr~0#1.base_93|)))))))) is different from false [2021-11-21 01:43:45,787 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) |c_calloc_model_~ptr~0#1.offset|) (forall ((|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|)) (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|) (select (store |c_#length| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6|)))) (exists ((|v_calloc_model_~ptr~0#1.base_93| (_ BitVec 32))) (and (or (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_92| (_ BitVec 32)) (|v_calloc_model_~size#1_92| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|) (select (store (store |c_old(#length)| |v_calloc_model_~ptr~0#1.base_93| (bvmul |v_calloc_model_~nmemb#1_92| |v_calloc_model_~size#1_92|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6|)))) (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_calloc_model_~ptr~0#1.base_93|))))))) (= |c_calloc_model_#Ultimate.C_memset_#ptr#1.base| |c_calloc_model_~ptr~0#1.base|) (forall ((|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|)) (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|) (select (store |c_#length| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8|)))) (exists ((|v_calloc_model_~ptr~0#1.base_93| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|))) (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_92| (_ BitVec 32)) (|v_calloc_model_~size#1_92| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|) (select (store (store |c_old(#length)| |v_calloc_model_~ptr~0#1.base_93| (bvmul |v_calloc_model_~nmemb#1_92| |v_calloc_model_~size#1_92|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_calloc_model_~ptr~0#1.base_93|))))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |c_calloc_model_~ptr~0#1.base|))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |c_#valid| |c_calloc_model_~ptr~0#1.base|)))) (= (store |c_old(#valid)| |c_calloc_model_~ptr~0#1.base| (_ bv1 1)) |c_#valid|) (= (bvmul |c_calloc_model_#in~nmemb#1| |c_calloc_model_#in~size#1|) (select |c_#length| |c_calloc_model_~ptr~0#1.base|)) (exists ((|calloc_model_~size#1| (_ BitVec 32)) (|calloc_model_~nmemb#1| (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |c_calloc_model_~ptr~0#1.base| (bvmul |calloc_model_~nmemb#1| |calloc_model_~size#1|))))) is different from false [2021-11-21 01:43:47,849 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) |c_calloc_model_~ptr~0#1.offset|) (forall ((|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|)) (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|) (select (store |c_#length| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6|)))) (exists ((|v_calloc_model_~ptr~0#1.base_93| (_ BitVec 32))) (and (or (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_92| (_ BitVec 32)) (|v_calloc_model_~size#1_92| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|) (select (store (store |c_old(#length)| |v_calloc_model_~ptr~0#1.base_93| (bvmul |v_calloc_model_~nmemb#1_92| |v_calloc_model_~size#1_92|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6|)))) (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_calloc_model_~ptr~0#1.base_93|))))))) (forall ((|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|)) (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|) (select (store |c_#length| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8|)))) (exists ((|v_calloc_model_~ptr~0#1.base_93| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|))) (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_92| (_ BitVec 32)) (|v_calloc_model_~size#1_92| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|) (select (store (store |c_old(#length)| |v_calloc_model_~ptr~0#1.base_93| (bvmul |v_calloc_model_~nmemb#1_92| |v_calloc_model_~size#1_92|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_calloc_model_~ptr~0#1.base_93|))))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |c_calloc_model_~ptr~0#1.base|))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |c_#valid| |c_calloc_model_~ptr~0#1.base|)))) (= (store |c_old(#valid)| |c_calloc_model_~ptr~0#1.base| (_ bv1 1)) |c_#valid|) (= (bvmul |c_calloc_model_#in~nmemb#1| |c_calloc_model_#in~size#1|) (select |c_#length| |c_calloc_model_~ptr~0#1.base|)) (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| .cse0) (bvule .cse0 (select (store |c_#length| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10|)))) (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|))) (exists ((|v_calloc_model_~size#1_108| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_108| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|) (select (store (store |c_old(#length)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (bvmul |v_calloc_model_~nmemb#1_108| |v_calloc_model_~size#1_108|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10|))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65|)))) (= (_ bv0 1) (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (_ bv1 1)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36|)))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36|))))) (exists ((|calloc_model_~size#1| (_ BitVec 32)) (|calloc_model_~nmemb#1| (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |c_calloc_model_~ptr~0#1.base| (bvmul |calloc_model_~nmemb#1| |calloc_model_~size#1|))))) is different from false [2021-11-21 01:43:49,931 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|)) (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|) (select (store |c_#length| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6|)))) (exists ((|v_calloc_model_~ptr~0#1.base_93| (_ BitVec 32))) (and (or (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_92| (_ BitVec 32)) (|v_calloc_model_~size#1_92| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|) (select (store (store |c_old(#length)| |v_calloc_model_~ptr~0#1.base_93| (bvmul |v_calloc_model_~nmemb#1_92| |v_calloc_model_~size#1_92|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_6|)))) (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_2|)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_calloc_model_~ptr~0#1.base_93|))))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |c_calloc_model_#res#1.base|))) (_ bv1 1))) (forall ((|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|)) (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|) (select (store |c_#length| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8|)))) (exists ((|v_calloc_model_~ptr~0#1.base_93| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|))) (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_92| (_ BitVec 32)) (|v_calloc_model_~size#1_92| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_4|) (select (store (store |c_old(#length)| |v_calloc_model_~ptr~0#1.base_93| (bvmul |v_calloc_model_~nmemb#1_92| |v_calloc_model_~size#1_92|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_30| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_8|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_calloc_model_~ptr~0#1.base_93|))))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |c_calloc_model_#res#1.base|)))) (= (store |c_old(#valid)| |c_calloc_model_#res#1.base| (_ bv1 1)) |c_#valid|) (= |c_calloc_model_#res#1.offset| (_ bv0 32)) (forall ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| .cse0) (bvule .cse0 (select (store |c_#length| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10|)))) (exists ((|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6| (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|))) (exists ((|v_calloc_model_~size#1_108| (_ BitVec 32)) (|v_calloc_model_~nmemb#1_108| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_l2_insert_~list#1.offset_BEFORE_CALL_6|) (select (store (store |c_old(#length)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (bvmul |v_calloc_model_~nmemb#1_108| |v_calloc_model_~size#1_108|)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36| (_ bv119 32)) |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_10|))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65|)))) (= (_ bv0 1) (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_65| (_ bv1 1)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36|)))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_36|))))) (exists ((|calloc_model_~size#1| (_ BitVec 32)) (|calloc_model_~nmemb#1| (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |c_calloc_model_#res#1.base| (bvmul |calloc_model_~nmemb#1| |calloc_model_~size#1|)))) (= (select |c_#length| |c_calloc_model_#res#1.base|) (bvmul |c_calloc_model_#in~nmemb#1| |c_calloc_model_#in~size#1|))) is different from false [2021-11-21 01:43:51,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:43:51,341 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2021-11-21 01:43:51,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:43:51,342 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 2.75) internal successors, (99), 32 states have internal predecessors, (99), 4 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) Word has length 46 [2021-11-21 01:43:51,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:43:51,343 INFO L225 Difference]: With dead ends: 134 [2021-11-21 01:43:51,344 INFO L226 Difference]: Without dead ends: 134 [2021-11-21 01:43:51,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 228 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 97.2s TimeCoverageRelationStatistics Valid=181, Invalid=1172, Unknown=27, NotChecked=972, Total=2352 [2021-11-21 01:43:51,347 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 11 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1000 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:43:51,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 744 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 1000 Unchecked, 0.9s Time] [2021-11-21 01:43:51,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-21 01:43:51,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-11-21 01:43:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 91 states have (on average 1.4945054945054945) internal successors, (136), 128 states have internal predecessors, (136), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:43:51,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 142 transitions. [2021-11-21 01:43:51,354 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 142 transitions. Word has length 46 [2021-11-21 01:43:51,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:43:51,355 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 142 transitions. [2021-11-21 01:43:51,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 2.75) internal successors, (99), 32 states have internal predecessors, (99), 4 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 01:43:51,355 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 142 transitions. [2021-11-21 01:43:51,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 01:43:51,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:43:51,357 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:43:51,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:43:51,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-21 01:43:51,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-21 01:43:51,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:43:51,962 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:43:51,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:43:51,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1493277915, now seen corresponding path program 1 times [2021-11-21 01:43:51,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:43:51,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176154369] [2021-11-21 01:43:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:43:51,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:43:51,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:43:51,964 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:43:52,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-21 01:43:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:43:52,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:43:52,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:43:52,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:43:52,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:43:53,842 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:43:53,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-21 01:43:53,853 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:43:53,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-11-21 01:43:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-21 01:43:54,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:43:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-21 01:43:59,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:43:59,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176154369] [2021-11-21 01:43:59,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176154369] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:43:59,142 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:43:59,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-21 01:43:59,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254198163] [2021-11-21 01:43:59,142 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:43:59,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:43:59,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:43:59,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:43:59,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=103, Unknown=1, NotChecked=0, Total=132 [2021-11-21 01:43:59,143 INFO L87 Difference]: Start difference. First operand 134 states and 142 transitions. Second operand has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:44:00,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:00,710 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2021-11-21 01:44:00,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:44:00,711 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2021-11-21 01:44:00,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:00,713 INFO L225 Difference]: With dead ends: 133 [2021-11-21 01:44:00,713 INFO L226 Difference]: Without dead ends: 133 [2021-11-21 01:44:00,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=34, Invalid=121, Unknown=1, NotChecked=0, Total=156 [2021-11-21 01:44:00,714 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 10 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:00,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 364 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 233 Unchecked, 1.3s Time] [2021-11-21 01:44:00,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-21 01:44:00,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-21 01:44:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 91 states have (on average 1.4835164835164836) internal successors, (135), 127 states have internal predecessors, (135), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:44:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2021-11-21 01:44:00,721 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 47 [2021-11-21 01:44:00,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:00,722 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2021-11-21 01:44:00,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:44:00,723 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2021-11-21 01:44:00,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-21 01:44:00,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:00,724 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:00,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-21 01:44:00,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:44:00,933 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:44:00,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:00,933 INFO L85 PathProgramCache]: Analyzing trace with hash 520999004, now seen corresponding path program 1 times [2021-11-21 01:44:00,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:44:00,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567103112] [2021-11-21 01:44:00,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:00,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:44:00,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:44:00,934 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:44:00,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-21 01:44:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:01,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:44:01,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-21 01:44:01,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:44:01,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-21 01:44:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-21 01:44:02,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:44:02,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567103112] [2021-11-21 01:44:02,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567103112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:44:02,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1132228386] [2021-11-21 01:44:02,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:02,305 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:44:02,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:44:02,308 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:44:02,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-21 01:44:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:02,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:44:02,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-21 01:44:02,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:44:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-21 01:44:02,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1132228386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:02,680 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:44:02,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7, 7] total 13 [2021-11-21 01:44:02,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296750383] [2021-11-21 01:44:02,680 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:02,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:44:02,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:44:02,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:44:02,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:44:02,681 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:44:02,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:02,980 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2021-11-21 01:44:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:44:02,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-11-21 01:44:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:02,982 INFO L225 Difference]: With dead ends: 134 [2021-11-21 01:44:02,982 INFO L226 Difference]: Without dead ends: 134 [2021-11-21 01:44:02,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:44:02,985 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 72 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:02,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 95 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:44:02,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-21 01:44:02,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2021-11-21 01:44:02,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 91 states have (on average 1.4725274725274726) internal successors, (134), 126 states have internal predecessors, (134), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:44:02,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2021-11-21 01:44:02,998 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 49 [2021-11-21 01:44:02,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:02,998 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2021-11-21 01:44:02,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:44:02,999 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2021-11-21 01:44:03,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 01:44:03,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:03,003 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:03,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-21 01:44:03,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-21 01:44:03,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:44:03,405 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:44:03,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:03,406 INFO L85 PathProgramCache]: Analyzing trace with hash -930488384, now seen corresponding path program 1 times [2021-11-21 01:44:03,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:44:03,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176049354] [2021-11-21 01:44:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:03,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:44:03,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:44:03,407 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:44:03,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-21 01:44:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:03,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 01:44:03,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:04,035 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-21 01:44:04,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-11-21 01:44:04,449 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-21 01:44:04,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 41 [2021-11-21 01:44:04,814 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-11-21 01:44:04,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 52 treesize of output 69 [2021-11-21 01:44:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-21 01:44:05,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:44:08,186 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_44| (_ BitVec 32)) (|v_ULTIMATE.start_l1_insert_~list#1.base_BEFORE_CALL_3| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_44| (_ bv1 1)))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select .cse0 |c_calloc_model_#res#1.base|)))) (_ bv1 1)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_l1_insert_~list#1.base_BEFORE_CALL_3|))) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_12|)))))) (exists ((|v_ULTIMATE.start_l2_insert_#t~ret5#1.base_79| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_44| (_ BitVec 32))) (let ((.cse1 (store (store |c_old(#valid)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_79| (_ bv1 1)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_44| (_ bv1 1)))) (and (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_l1_insert_~list#1.base_BEFORE_CALL_3|)))))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_12|))))) (_ bv1 1))))))))) is different from false [2021-11-21 01:44:30,802 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_12| (_ BitVec 32)) (|v_calloc_model_~ptr~0#1.base_138| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_44| (_ BitVec 32)) (|v_ULTIMATE.start_l1_insert_~list#1.base_BEFORE_CALL_3| (_ BitVec 32))) (let ((.cse0 (store (store |c_#valid| |v_calloc_model_~ptr~0#1.base_138| (_ bv1 1)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_44| (_ bv1 1)))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_l1_insert_~list#1.base_BEFORE_CALL_3|)))) (_ bv1 1))) (exists ((|v_ULTIMATE.start_l2_insert_#t~ret5#1.base_79| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_44| (_ BitVec 32))) (let ((.cse1 (store (store |c_old(#valid)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_79| (_ bv1 1)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_44| (_ bv1 1)))) (and (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_l1_insert_~list#1.base_BEFORE_CALL_3|)))))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_12|))))) (_ bv1 1)))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_12|))) (_ bv1 1))))))) is different from false [2021-11-21 01:44:35,955 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_calloc_model_~ptr~0#1.base_142| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_44| (_ BitVec 32)) (|v_ULTIMATE.start_l1_insert_~list#1.base_BEFORE_CALL_3| (_ BitVec 32))) (let ((.cse1 (store (store |c_#valid| |v_calloc_model_~ptr~0#1.base_142| (_ bv1 1)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_44| (_ bv1 1)))) (or (exists ((|v_ULTIMATE.start_l2_insert_#t~ret5#1.base_79| (_ BitVec 32)) (|v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_44| (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| |v_ULTIMATE.start_l2_insert_#t~ret5#1.base_79| (_ bv1 1)) |v_ULTIMATE.start_l2_insert_#t~malloc6#1.base_44| (_ bv1 1)))) (and (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_l1_insert_~list#1.base_BEFORE_CALL_3|)))))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_12|))))) (_ bv1 1)))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_l1_insert_~list#1.base_BEFORE_CALL_3|)))) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_l2_insert_~list#1.base_BEFORE_CALL_12|))) (_ bv1 1))))))) is different from false [2021-11-21 01:44:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 3 not checked. [2021-11-21 01:44:36,062 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:44:36,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176049354] [2021-11-21 01:44:36,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176049354] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:44:36,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:44:36,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 25 [2021-11-21 01:44:36,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112977884] [2021-11-21 01:44:36,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:36,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:44:36,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:44:36,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:44:36,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=422, Unknown=7, NotChecked=138, Total=702 [2021-11-21 01:44:36,064 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:44:41,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:41,823 INFO L93 Difference]: Finished difference Result 189 states and 204 transitions. [2021-11-21 01:44:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 01:44:41,824 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2021-11-21 01:44:41,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:41,826 INFO L225 Difference]: With dead ends: 189 [2021-11-21 01:44:41,826 INFO L226 Difference]: Without dead ends: 189 [2021-11-21 01:44:41,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=259, Invalid=866, Unknown=9, NotChecked=198, Total=1332 [2021-11-21 01:44:41,828 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 29 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:41,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 369 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 275 Invalid, 0 Unknown, 67 Unchecked, 1.0s Time] [2021-11-21 01:44:41,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-21 01:44:41,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2021-11-21 01:44:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 141 states have (on average 1.3475177304964538) internal successors, (190), 176 states have internal predecessors, (190), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:44:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 200 transitions. [2021-11-21 01:44:41,837 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 200 transitions. Word has length 52 [2021-11-21 01:44:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:41,837 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 200 transitions. [2021-11-21 01:44:41,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:44:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 200 transitions. [2021-11-21 01:44:41,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 01:44:41,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:41,839 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:41,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-21 01:44:42,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:44:42,062 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-21 01:44:42,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:42,062 INFO L85 PathProgramCache]: Analyzing trace with hash -930488383, now seen corresponding path program 1 times [2021-11-21 01:44:42,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:44:42,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929833485] [2021-11-21 01:44:42,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:42,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:44:42,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:44:42,064 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:44:42,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42f7ea4-1930-4935-948e-ebf2ee9c8ca9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-21 01:44:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:42,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 01:44:42,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:45,982 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-21 01:44:45,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-11-21 01:44:46,038 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:44:46,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-11-21 01:44:49,742 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-21 01:44:49,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-21 01:44:51,221 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 01:44:51,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-11-21 01:44:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-21 01:44:52,979 INFO L328 TraceCheckSpWp]: Computing backward predicates...