./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:57:20,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:57:20,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:57:20,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:57:20,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:57:20,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:57:20,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:57:20,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:57:20,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:57:20,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:57:20,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:57:20,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:57:20,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:57:20,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:57:20,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:57:20,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:57:20,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:57:20,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:57:20,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:57:20,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:57:20,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:57:20,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:57:20,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:57:20,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:57:20,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:57:20,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:57:20,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:57:20,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:57:20,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:57:20,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:57:20,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:57:20,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:57:20,807 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:57:20,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:57:20,809 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:57:20,809 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:57:20,810 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:57:20,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:57:20,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:57:20,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:57:20,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:57:20,814 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:57:20,838 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:57:20,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:57:20,838 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:57:20,839 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:57:20,839 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:57:20,840 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:57:20,840 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:57:20,840 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:57:20,840 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:57:20,841 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:57:20,841 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:57:20,841 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:57:20,842 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:57:20,842 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:57:20,842 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:57:20,842 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:57:20,843 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:57:20,843 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:57:20,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:57:20,844 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:57:20,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:57:20,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:57:20,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:57:20,845 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:57:20,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:57:20,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:57:20,846 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:57:20,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:57:20,846 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:57:20,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:57:20,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:57:20,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:57:20,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:57:20,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:57:20,848 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:57:20,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:57:20,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:57:20,849 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:57:20,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:57:20,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:57:20,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:57:20,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2022-11-26 00:57:21,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:57:21,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:57:21,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:57:21,119 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:57:21,120 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:57:21,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-11-26 00:57:24,188 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:57:24,451 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:57:24,452 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-11-26 00:57:24,459 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/data/a91129784/9f47bfa0aa1e4d6aa19cefe357960328/FLAGe96c5ec50 [2022-11-26 00:57:24,480 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/data/a91129784/9f47bfa0aa1e4d6aa19cefe357960328 [2022-11-26 00:57:24,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:57:24,488 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:57:24,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:57:24,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:57:24,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:57:24,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:57:24" (1/1) ... [2022-11-26 00:57:24,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@692f4af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:24, skipping insertion in model container [2022-11-26 00:57:24,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:57:24" (1/1) ... [2022-11-26 00:57:24,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:57:24,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:57:24,679 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2022-11-26 00:57:24,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:57:24,725 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:57:24,739 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2022-11-26 00:57:24,754 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:57:24,769 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:57:24,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:24 WrapperNode [2022-11-26 00:57:24,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:57:24,771 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:57:24,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:57:24,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:57:24,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:24" (1/1) ... [2022-11-26 00:57:24,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:24" (1/1) ... [2022-11-26 00:57:24,813 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 125 [2022-11-26 00:57:24,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:57:24,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:57:24,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:57:24,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:57:24,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:24" (1/1) ... [2022-11-26 00:57:24,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:24" (1/1) ... [2022-11-26 00:57:24,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:24" (1/1) ... [2022-11-26 00:57:24,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:24" (1/1) ... [2022-11-26 00:57:24,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:24" (1/1) ... [2022-11-26 00:57:24,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:24" (1/1) ... [2022-11-26 00:57:24,843 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:24" (1/1) ... [2022-11-26 00:57:24,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:24" (1/1) ... [2022-11-26 00:57:24,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:57:24,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:57:24,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:57:24,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:57:24,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:24" (1/1) ... [2022-11-26 00:57:24,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:57:24,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:57:24,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:57:24,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:57:24,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:57:24,924 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:57:24,925 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:57:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:57:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:57:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:57:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:57:24,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:57:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:57:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-26 00:57:24,926 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-26 00:57:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:57:25,022 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:57:25,024 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:57:25,347 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:57:25,467 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:57:25,467 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-26 00:57:25,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:57:25 BoogieIcfgContainer [2022-11-26 00:57:25,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:57:25,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:57:25,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:57:25,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:57:25,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:57:24" (1/3) ... [2022-11-26 00:57:25,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3c1572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:57:25, skipping insertion in model container [2022-11-26 00:57:25,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:24" (2/3) ... [2022-11-26 00:57:25,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3c1572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:57:25, skipping insertion in model container [2022-11-26 00:57:25,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:57:25" (3/3) ... [2022-11-26 00:57:25,480 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2022-11-26 00:57:25,500 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:57:25,500 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:57:25,558 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:57:25,566 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6f50d38b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:57:25,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:57:25,571 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:57:25,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:57:25,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:25,580 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:57:25,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:57:25,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:25,587 INFO L85 PathProgramCache]: Analyzing trace with hash -316911424, now seen corresponding path program 1 times [2022-11-26 00:57:25,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:25,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155324234] [2022-11-26 00:57:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:25,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:57:26,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:26,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155324234] [2022-11-26 00:57:26,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155324234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:57:26,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:57:26,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:57:26,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670754342] [2022-11-26 00:57:26,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:57:26,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:57:26,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:57:26,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:57:26,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:57:26,416 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:57:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:26,696 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2022-11-26 00:57:26,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:57:26,699 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2022-11-26 00:57:26,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:26,707 INFO L225 Difference]: With dead ends: 63 [2022-11-26 00:57:26,707 INFO L226 Difference]: Without dead ends: 43 [2022-11-26 00:57:26,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:57:26,714 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:26,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 85 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:57:26,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-26 00:57:26,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 25. [2022-11-26 00:57:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:57:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-11-26 00:57:26,757 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 24 [2022-11-26 00:57:26,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:57:26,758 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-11-26 00:57:26,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:57:26,758 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-11-26 00:57:26,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:57:26,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:26,760 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:57:26,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:57:26,761 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:57:26,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:26,762 INFO L85 PathProgramCache]: Analyzing trace with hash -836108414, now seen corresponding path program 1 times [2022-11-26 00:57:26,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:26,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233656547] [2022-11-26 00:57:26,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:26,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:57:27,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:27,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233656547] [2022-11-26 00:57:27,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233656547] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:57:27,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599787410] [2022-11-26 00:57:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:27,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:27,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:57:27,615 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:57:27,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:57:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:27,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-26 00:57:27,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:57:28,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:57:28,197 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-26 00:57:28,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 37 treesize of output 23 [2022-11-26 00:57:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:57:28,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:57:28,264 INFO L350 Elim1Store]: Elim1 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 13 [2022-11-26 00:57:28,269 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 16 [2022-11-26 00:57:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:57:28,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599787410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:57:28,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [909978773] [2022-11-26 00:57:28,429 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-26 00:57:28,430 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:57:28,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:57:28,439 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:57:28,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:57:28,817 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-26 00:57:28,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 215 treesize of output 217 [2022-11-26 00:57:28,884 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-26 00:57:28,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 217 [2022-11-26 00:57:29,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:57:29,529 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-26 00:57:29,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 241 treesize of output 244 [2022-11-26 00:57:29,634 INFO L321 Elim1Store]: treesize reduction 116, result has 17.7 percent of original size [2022-11-26 00:57:29,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 242 treesize of output 248 [2022-11-26 00:57:29,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 00:57:29,920 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:57:30,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 00:57:30,181 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:57:30,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:57:30,412 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:57:30,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 349 treesize of output 346 [2022-11-26 00:57:30,655 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-26 00:57:30,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 340 treesize of output 336 [2022-11-26 00:57:30,685 INFO L321 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2022-11-26 00:57:30,686 INFO L350 Elim1Store]: Elim1 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 335 treesize of output 332 [2022-11-26 00:57:31,574 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-26 00:57:31,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:57:31,584 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:57:31,586 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:57:38,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [909978773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:57:38,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:57:38,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [11, 10, 8] total 39 [2022-11-26 00:57:38,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627427745] [2022-11-26 00:57:38,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:57:38,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:57:38,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:57:38,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:57:38,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1304, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:57:38,541 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:57:40,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:40,034 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2022-11-26 00:57:40,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:57:40,036 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-11-26 00:57:40,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:40,037 INFO L225 Difference]: With dead ends: 55 [2022-11-26 00:57:40,037 INFO L226 Difference]: Without dead ends: 46 [2022-11-26 00:57:40,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=187, Invalid=1373, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:57:40,039 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:40,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 98 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:57:40,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-26 00:57:40,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-11-26 00:57:40,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:57:40,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-11-26 00:57:40,069 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 25 [2022-11-26 00:57:40,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:57:40,070 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-11-26 00:57:40,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:57:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-11-26 00:57:40,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-26 00:57:40,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:40,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:57:40,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:57:40,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-26 00:57:40,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:57:40,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:40,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1147529129, now seen corresponding path program 1 times [2022-11-26 00:57:40,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:40,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175441352] [2022-11-26 00:57:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:40,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:57:40,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:40,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175441352] [2022-11-26 00:57:40,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175441352] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:57:40,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386939697] [2022-11-26 00:57:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:40,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:40,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:57:40,444 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:57:40,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:57:40,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:40,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-26 00:57:40,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:57:40,584 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:57:40,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:57:40,671 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:57:40,672 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:57:40,714 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_53 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_53))) is different from true [2022-11-26 00:57:40,719 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 15 [2022-11-26 00:57:40,754 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 15 [2022-11-26 00:57:40,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-11-26 00:57:40,876 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 33 [2022-11-26 00:57:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 1 not checked. [2022-11-26 00:57:40,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:11,319 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_54 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_54) |c_ULTIMATE.start_main_~a~0#1.base|))) is different from false [2022-11-26 00:58:11,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386939697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:11,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [571900573] [2022-11-26 00:58:11,341 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-26 00:58:11,341 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:11,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:11,342 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:11,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:11,640 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:58:11,647 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-26 00:58:11,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:58:11,863 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:58:11,864 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:58:11,896 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:58:11,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:58:12,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 00:58:12,027 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:58:12,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 00:58:12,160 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:58:12,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:58:12,301 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:58:12,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 235 treesize of output 232 [2022-11-26 00:58:12,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:12,387 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:58:12,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:58:12,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:58:12,699 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:58:12,731 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:58:12,732 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:58:16,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [571900573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:16,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:58:16,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 15] total 37 [2022-11-26 00:58:16,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050814613] [2022-11-26 00:58:16,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:16,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:58:16,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:16,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:58:16,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1388, Unknown=16, NotChecked=154, Total=1722 [2022-11-26 00:58:16,542 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:58:20,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:20,901 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-11-26 00:58:20,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:58:20,902 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2022-11-26 00:58:20,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:20,903 INFO L225 Difference]: With dead ends: 58 [2022-11-26 00:58:20,903 INFO L226 Difference]: Without dead ends: 51 [2022-11-26 00:58:20,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=378, Invalid=2370, Unknown=16, NotChecked=206, Total=2970 [2022-11-26 00:58:20,905 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 110 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:20,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 63 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:58:20,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-26 00:58:20,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2022-11-26 00:58:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:58:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2022-11-26 00:58:20,930 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 26 [2022-11-26 00:58:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:20,930 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2022-11-26 00:58:20,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:58:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2022-11-26 00:58:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:58:20,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:20,931 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:58:20,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 00:58:21,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:21,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:21,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:21,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1985606588, now seen corresponding path program 1 times [2022-11-26 00:58:21,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:21,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143047534] [2022-11-26 00:58:21,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:21,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:58:21,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:21,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143047534] [2022-11-26 00:58:21,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143047534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:21,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560684864] [2022-11-26 00:58:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:21,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:21,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:21,300 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:21,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:58:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:21,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:58:21,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:58:21,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:58:21,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560684864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:21,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [560507619] [2022-11-26 00:58:21,515 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-26 00:58:21,515 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:21,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:21,515 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:21,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:21,731 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:58:21,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 229 [2022-11-26 00:58:21,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 217 [2022-11-26 00:58:21,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:58:22,183 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-26 00:58:22,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 268 [2022-11-26 00:58:22,261 INFO L321 Elim1Store]: treesize reduction 116, result has 17.7 percent of original size [2022-11-26 00:58:22,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 266 treesize of output 272 [2022-11-26 00:58:22,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:58:22,539 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:58:22,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:58:22,773 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:58:22,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:58:22,969 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:58:22,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 373 treesize of output 370 [2022-11-26 00:58:23,139 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-26 00:58:23,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 364 treesize of output 360 [2022-11-26 00:58:23,166 INFO L321 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2022-11-26 00:58:23,167 INFO L350 Elim1Store]: Elim1 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 359 treesize of output 356 [2022-11-26 00:58:24,409 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-26 00:58:24,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:58:24,416 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:58:24,418 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:58:31,181 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1016#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= |ULTIMATE.start_upsweep_#res#1| 1) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 1 |ULTIMATE.start_main_~space~1#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_~n#1| 1) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~n#1| 1) (<= 1 |ULTIMATE.start_upsweep_#res#1|) (<= |ULTIMATE.start_main_~space~1#1| 1) (<= |ULTIMATE.start_upsweep_~n#1| 1) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_#in~n#1| 1) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 1 |ULTIMATE.start_downsweep_#in~space#1|) (<= |ULTIMATE.start_main_~i~1#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 1) (<= |ULTIMATE.start_downsweep_~n#1| 1) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_~x#1| 1) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 1) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 1) (<= 0 (+ |ULTIMATE.start_is_pow2_~x#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-11-26 00:58:31,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:58:31,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:58:31,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-11-26 00:58:31,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775957146] [2022-11-26 00:58:31,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:58:31,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:58:31,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:31,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:58:31,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:58:31,183 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:58:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:31,615 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2022-11-26 00:58:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:58:31,617 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-11-26 00:58:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:31,618 INFO L225 Difference]: With dead ends: 76 [2022-11-26 00:58:31,618 INFO L226 Difference]: Without dead ends: 60 [2022-11-26 00:58:31,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=236, Invalid=1324, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:58:31,619 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 49 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:31,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 218 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:58:31,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-26 00:58:31,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2022-11-26 00:58:31,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:58:31,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2022-11-26 00:58:31,648 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 28 [2022-11-26 00:58:31,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:31,648 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2022-11-26 00:58:31,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:58:31,648 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2022-11-26 00:58:31,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:58:31,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:31,649 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:58:31,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:31,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:31,855 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:31,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:31,855 INFO L85 PathProgramCache]: Analyzing trace with hash 91873026, now seen corresponding path program 1 times [2022-11-26 00:58:31,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:31,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224731051] [2022-11-26 00:58:31,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:31,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:58:32,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:32,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224731051] [2022-11-26 00:58:32,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224731051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:32,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000859181] [2022-11-26 00:58:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:32,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:32,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:32,036 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:32,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:58:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:32,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:58:32,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:58:32,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:58:32,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000859181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:32,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1890380091] [2022-11-26 00:58:32,221 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-26 00:58:32,221 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:32,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:32,222 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:32,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:32,484 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-26 00:58:32,490 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:58:32,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:58:32,627 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:58:32,627 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:58:32,656 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:58:32,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:58:32,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 00:58:32,765 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:58:32,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 00:58:32,864 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:58:32,946 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-26 00:58:32,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-26 00:58:32,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:33,003 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:58:33,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:58:33,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:58:33,229 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:58:33,258 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:58:33,259 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:58:36,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1890380091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:36,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:58:36,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7, 5, 5] total 30 [2022-11-26 00:58:36,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610672781] [2022-11-26 00:58:36,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:36,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 00:58:36,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:36,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 00:58:36,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:58:36,651 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:58:41,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:41,512 INFO L93 Difference]: Finished difference Result 75 states and 105 transitions. [2022-11-26 00:58:41,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:58:41,513 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2022-11-26 00:58:41,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:41,514 INFO L225 Difference]: With dead ends: 75 [2022-11-26 00:58:41,514 INFO L226 Difference]: Without dead ends: 60 [2022-11-26 00:58:41,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=294, Invalid=1598, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 00:58:41,516 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:41,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 64 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:58:41,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-26 00:58:41,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2022-11-26 00:58:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 states have internal predecessors, (56), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:58:41,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2022-11-26 00:58:41,544 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 28 [2022-11-26 00:58:41,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:41,545 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2022-11-26 00:58:41,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:58:41,545 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2022-11-26 00:58:41,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-26 00:58:41,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:41,546 INFO L195 NwaCegarLoop]: 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] [2022-11-26 00:58:41,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:41,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:41,749 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:41,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:41,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1160082938, now seen corresponding path program 2 times [2022-11-26 00:58:41,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:41,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213681258] [2022-11-26 00:58:41,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:41,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:58:41,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:41,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213681258] [2022-11-26 00:58:41,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213681258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:41,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050999836] [2022-11-26 00:58:41,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:58:41,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:41,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:41,891 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:41,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:58:41,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:58:41,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:58:41,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:58:41,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:58:42,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:58:42,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050999836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:42,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [749385005] [2022-11-26 00:58:42,064 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-26 00:58:42,064 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:42,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:42,064 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:42,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:42,261 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:58:42,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 229 [2022-11-26 00:58:42,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 217 [2022-11-26 00:58:42,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:58:42,672 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-26 00:58:42,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 268 [2022-11-26 00:58:42,749 INFO L321 Elim1Store]: treesize reduction 116, result has 17.7 percent of original size [2022-11-26 00:58:42,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 266 treesize of output 272 [2022-11-26 00:58:43,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:58:43,019 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:58:43,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:58:43,245 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:58:43,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:58:43,442 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:58:43,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 379 treesize of output 376 [2022-11-26 00:58:43,600 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-26 00:58:43,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 370 treesize of output 366 [2022-11-26 00:58:43,626 INFO L321 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2022-11-26 00:58:43,626 INFO L350 Elim1Store]: Elim1 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 365 treesize of output 362 [2022-11-26 00:58:44,803 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-26 00:58:44,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:58:44,810 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:58:44,811 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:58:52,320 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1863#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= |ULTIMATE.start_upsweep_#res#1| 1) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 1 |ULTIMATE.start_main_~space~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_~n#1| 1) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~n#1| 1) (<= 1 |ULTIMATE.start_upsweep_#res#1|) (<= |ULTIMATE.start_main_~space~1#1| 1) (<= |ULTIMATE.start_upsweep_~n#1| 1) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_#in~n#1| 1) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 1 |ULTIMATE.start_downsweep_#in~space#1|) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_upsweep_#in~n#1| 1) (<= |ULTIMATE.start_downsweep_~n#1| 1) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_~x#1| 1) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (or (and (= |ULTIMATE.start_upsweep_~space~0#1| 1) (= |ULTIMATE.start_main_~i~1#1| 1) (= |#NULL.base| 0)) (and (= |ULTIMATE.start_upsweep_~space~0#1| 1) (= |ULTIMATE.start_main_~i~1#1| 0) (= |#NULL.base| 0))) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 1) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~n~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 1) (<= 0 (+ |ULTIMATE.start_is_pow2_~x#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-11-26 00:58:52,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:58:52,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:58:52,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-11-26 00:58:52,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164754749] [2022-11-26 00:58:52,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:58:52,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 00:58:52,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:52,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 00:58:52,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:58:52,323 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:58:52,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:52,578 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2022-11-26 00:58:52,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:58:52,578 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-11-26 00:58:52,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:52,579 INFO L225 Difference]: With dead ends: 60 [2022-11-26 00:58:52,579 INFO L226 Difference]: Without dead ends: 40 [2022-11-26 00:58:52,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:58:52,581 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 41 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:52,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 142 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:58:52,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-26 00:58:52,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-11-26 00:58:52,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:58:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2022-11-26 00:58:52,597 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 29 [2022-11-26 00:58:52,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:52,598 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2022-11-26 00:58:52,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:58:52,598 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2022-11-26 00:58:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-26 00:58:52,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:52,599 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:58:52,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:52,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:52,803 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:52,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:52,804 INFO L85 PathProgramCache]: Analyzing trace with hash 966051846, now seen corresponding path program 1 times [2022-11-26 00:58:52,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:52,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965574355] [2022-11-26 00:58:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:52,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:58:52,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:52,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965574355] [2022-11-26 00:58:52,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965574355] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:52,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718297202] [2022-11-26 00:58:52,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:52,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:52,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:52,968 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:52,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:58:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:53,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:58:53,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:58:53,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:58:53,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718297202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:53,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [935966251] [2022-11-26 00:58:53,132 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-26 00:58:53,132 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:53,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:53,133 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:53,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:53,422 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-26 00:58:53,428 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:58:53,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:58:53,558 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:58:53,559 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:58:53,585 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:58:53,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:58:53,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 00:58:53,727 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:58:53,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 00:58:53,840 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:58:53,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-26 00:58:53,969 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:58:53,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 248 treesize of output 245 [2022-11-26 00:58:54,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:54,032 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:58:54,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:58:54,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:58:54,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:58:54,322 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-11-26 00:58:54,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 56 [2022-11-26 00:58:54,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:58:54,578 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:58:54,606 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:58:54,607 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:58:58,196 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2235#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_downsweep_~a#1.offset| |ULTIMATE.start_downsweep_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_downsweep_~a#1.base|) (+ |ULTIMATE.start_downsweep_~a#1.offset| (- 4) (* |ULTIMATE.start_downsweep_~n#1| 4))) 0) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_downsweep_#in~a#1.offset|) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_#res#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= (ite (and (< |ULTIMATE.start_downsweep_#in~space#1| 0) (not (= (mod |ULTIMATE.start_downsweep_#in~space#1| 2) 0))) (+ (div |ULTIMATE.start_downsweep_#in~space#1| 2) 1) (div |ULTIMATE.start_downsweep_#in~space#1| 2)) |ULTIMATE.start_downsweep_~space#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_upsweep_#res#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_downsweep_#in~a#1.base|) (not (< |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~n#1|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_downsweep_~n#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~a#1.base| |ULTIMATE.start_downsweep_~a#1.base|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~space#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_main_~n~0#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:58:58,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:58:58,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:58:58,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-26 00:58:58,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189204579] [2022-11-26 00:58:58,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:58:58,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:58:58,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:58,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:58:58,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:58:58,198 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:58:58,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:58,385 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-11-26 00:58:58,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:58:58,385 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-11-26 00:58:58,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:58,386 INFO L225 Difference]: With dead ends: 39 [2022-11-26 00:58:58,386 INFO L226 Difference]: Without dead ends: 29 [2022-11-26 00:58:58,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:58:58,387 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:58,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 108 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:58:58,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-26 00:58:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-26 00:58:58,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:58:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-11-26 00:58:58,401 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 29 [2022-11-26 00:58:58,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:58,401 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-11-26 00:58:58,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:58:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-11-26 00:58:58,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-26 00:58:58,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:58,402 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:58:58,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-26 00:58:58,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 00:58:58,607 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:58,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:58,607 INFO L85 PathProgramCache]: Analyzing trace with hash 227143670, now seen corresponding path program 2 times [2022-11-26 00:58:58,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:58,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555581165] [2022-11-26 00:58:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:58,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:58:58,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:58,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555581165] [2022-11-26 00:58:58,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555581165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:58,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887590348] [2022-11-26 00:58:58,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:58:58,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:58,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:58,824 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:58,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:58:58,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-26 00:58:58,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:58:58,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-26 00:58:58,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:58,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:58:59,063 INFO L321 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-11-26 00:58:59,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 45 treesize of output 23 [2022-11-26 00:58:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:58:59,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:58:59,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887590348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:59,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:58:59,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-26 00:58:59,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129326089] [2022-11-26 00:58:59,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:59,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:58:59,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:59,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:58:59,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:58:59,081 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:58:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:59,311 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-11-26 00:58:59,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:58:59,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-11-26 00:58:59,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:59,312 INFO L225 Difference]: With dead ends: 42 [2022-11-26 00:58:59,312 INFO L226 Difference]: Without dead ends: 40 [2022-11-26 00:58:59,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:58:59,313 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:59,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 68 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:58:59,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-26 00:58:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-11-26 00:58:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:58:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-11-26 00:58:59,337 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 30 [2022-11-26 00:58:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:59,338 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-11-26 00:58:59,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:58:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-11-26 00:58:59,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 00:58:59,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:59,342 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:58:59,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:59,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 00:58:59,547 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:59,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:59,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1184314758, now seen corresponding path program 1 times [2022-11-26 00:58:59,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:59,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793351171] [2022-11-26 00:58:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:59,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:58:59,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:59,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793351171] [2022-11-26 00:58:59,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793351171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:59,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834286275] [2022-11-26 00:58:59,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:59,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:59,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:59,772 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:59,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:58:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:59,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:58:59,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:58:59,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:59:00,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834286275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:00,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [113175026] [2022-11-26 00:59:00,054 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:59:00,054 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:00,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:59:00,055 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:59:00,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:59:00,262 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-26 00:59:00,271 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:59:00,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:59:00,400 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:59:00,401 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:59:00,427 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:59:00,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:59:00,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 00:59:00,538 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:59:00,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 00:59:00,625 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:59:00,701 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-26 00:59:00,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-26 00:59:00,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:00,753 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:59:00,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:59:00,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:00,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:59:00,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:00,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:59:01,048 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-11-26 00:59:01,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 56 [2022-11-26 00:59:01,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:59:01,431 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:59:01,459 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:59:01,460 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:59:05,198 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2790#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:59:05,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:59:05,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:05,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-11-26 00:59:05,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633593422] [2022-11-26 00:59:05,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:05,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:59:05,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:05,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:59:05,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 00:59:05,204 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:59:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:05,446 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-11-26 00:59:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:59:05,446 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2022-11-26 00:59:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:05,447 INFO L225 Difference]: With dead ends: 39 [2022-11-26 00:59:05,447 INFO L226 Difference]: Without dead ends: 34 [2022-11-26 00:59:05,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:59:05,449 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:05,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 142 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:59:05,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-26 00:59:05,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-26 00:59:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:59:05,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-11-26 00:59:05,468 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 32 [2022-11-26 00:59:05,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:05,468 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-11-26 00:59:05,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:59:05,468 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-11-26 00:59:05,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:59:05,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:05,469 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:59:05,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:05,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:05,680 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:59:05,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:05,681 INFO L85 PathProgramCache]: Analyzing trace with hash 319410183, now seen corresponding path program 1 times [2022-11-26 00:59:05,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:05,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846285941] [2022-11-26 00:59:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:05,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:59:07,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:07,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846285941] [2022-11-26 00:59:07,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846285941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:07,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067974819] [2022-11-26 00:59:07,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:07,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:07,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:07,601 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:07,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:59:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:07,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-26 00:59:07,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:07,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:59:08,174 INFO L321 Elim1Store]: treesize reduction 126, result has 11.3 percent of original size [2022-11-26 00:59:08,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 30 [2022-11-26 00:59:08,347 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-26 00:59:08,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 [2022-11-26 00:59:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:59:08,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:08,742 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 44 [2022-11-26 00:59:08,755 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-26 00:59:08,755 INFO L350 Elim1Store]: Elim1 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 906 treesize of output 786 [2022-11-26 00:59:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:59:09,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067974819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:09,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2116754844] [2022-11-26 00:59:09,293 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:59:09,293 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:09,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:59:09,293 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:59:09,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:59:09,491 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-26 00:59:09,505 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:59:09,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:59:09,630 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 00:59:09,631 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 00:59:09,659 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:59:09,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 00:59:09,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 00:59:09,771 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:59:09,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 00:59:09,887 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:59:09,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-26 00:59:10,016 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 00:59:10,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 248 treesize of output 245 [2022-11-26 00:59:10,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:10,078 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:59:10,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:59:10,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:10,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:59:10,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:10,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 00:59:10,360 INFO L321 Elim1Store]: treesize reduction 23, result has 57.4 percent of original size [2022-11-26 00:59:10,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 44 [2022-11-26 00:59:10,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:59:10,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:10,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:10,513 INFO L321 Elim1Store]: treesize reduction 23, result has 58.9 percent of original size [2022-11-26 00:59:10,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 64 [2022-11-26 00:59:10,605 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-11-26 00:59:10,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-11-26 00:59:10,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:10,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:10,789 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:59:10,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 180 [2022-11-26 00:59:10,921 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-11-26 00:59:10,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-11-26 00:59:11,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:11,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:11,344 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:59:11,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 180 [2022-11-26 00:59:11,491 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-11-26 00:59:11,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-11-26 00:59:11,642 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 00:59:11,669 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:59:11,670 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:59:20,954 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3168#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (or (and (<= |ULTIMATE.start_downsweep_~n#1| |ULTIMATE.start_downsweep_~right~1#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~right~1#1| 1)) (exists ((|v_ULTIMATE.start_downsweep_~space#1_33| Int)) (and (= (ite (and (< |v_ULTIMATE.start_downsweep_~space#1_33| 0) (not (= (mod |v_ULTIMATE.start_downsweep_~space#1_33| 2) 0))) (+ 1 (div |v_ULTIMATE.start_downsweep_~space#1_33| 2)) (div |v_ULTIMATE.start_downsweep_~space#1_33| 2)) |ULTIMATE.start_downsweep_~space#1|) (<= 0 |v_ULTIMATE.start_downsweep_~space#1_33|))) (= |#NULL.base| 0)) (and (= (select (select |#memory_int| |ULTIMATE.start_downsweep_~a#1.base|) (+ |ULTIMATE.start_downsweep_~a#1.offset| (- 4) (* |ULTIMATE.start_downsweep_~n#1| 4))) 0) (= |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_#res#1|) (= (ite (and (< |ULTIMATE.start_downsweep_#in~space#1| 0) (not (= (mod |ULTIMATE.start_downsweep_#in~space#1| 2) 0))) (+ (div |ULTIMATE.start_downsweep_#in~space#1| 2) 1) (div |ULTIMATE.start_downsweep_#in~space#1| 2)) |ULTIMATE.start_downsweep_~space#1|) (= |ULTIMATE.start_upsweep_#res#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_downsweep_#in~a#1.base|) (<= |ULTIMATE.start_upsweep_~n#1| |ULTIMATE.start_upsweep_~space~0#1|) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_downsweep_~n#1|) (= |ULTIMATE.start_downsweep_#in~a#1.base| |ULTIMATE.start_downsweep_~a#1.base|) (= |ULTIMATE.start_downsweep_#in~space#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_main_~n~0#1|) (= |#NULL.base| 0))) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0))' at error location [2022-11-26 00:59:20,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:59:20,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:20,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 12] total 39 [2022-11-26 00:59:20,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213421751] [2022-11-26 00:59:20,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:20,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-26 00:59:20,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:20,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-26 00:59:20,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=3278, Unknown=0, NotChecked=0, Total=3540 [2022-11-26 00:59:20,958 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 39 states, 34 states have (on average 1.588235294117647) internal successors, (54), 37 states have internal predecessors, (54), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:59:30,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:30,749 INFO L93 Difference]: Finished difference Result 113 states and 148 transitions. [2022-11-26 00:59:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-26 00:59:30,749 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 34 states have (on average 1.588235294117647) internal successors, (54), 37 states have internal predecessors, (54), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 33 [2022-11-26 00:59:30,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:30,750 INFO L225 Difference]: With dead ends: 113 [2022-11-26 00:59:30,750 INFO L226 Difference]: Without dead ends: 104 [2022-11-26 00:59:30,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2803 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=1397, Invalid=9945, Unknown=0, NotChecked=0, Total=11342 [2022-11-26 00:59:30,754 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 399 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:30,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 200 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:59:30,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-26 00:59:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 41. [2022-11-26 00:59:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:59:30,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-11-26 00:59:30,785 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 33 [2022-11-26 00:59:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:30,786 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-11-26 00:59:30,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 34 states have (on average 1.588235294117647) internal successors, (54), 37 states have internal predecessors, (54), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:59:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-11-26 00:59:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:59:30,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:30,787 INFO L195 NwaCegarLoop]: 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] [2022-11-26 00:59:30,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:30,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:30,993 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:59:30,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:30,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2026580144, now seen corresponding path program 1 times [2022-11-26 00:59:30,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:30,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302523602] [2022-11-26 00:59:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:30,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:59:31,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:31,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302523602] [2022-11-26 00:59:31,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302523602] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:31,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003666351] [2022-11-26 00:59:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:31,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:31,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:31,233 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:31,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:59:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:31,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:59:31,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:59:31,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:59:31,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003666351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:31,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:59:31,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2022-11-26 00:59:31,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118668486] [2022-11-26 00:59:31,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:31,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:59:31,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:31,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:59:31,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:59:31,380 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:59:31,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:31,498 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-11-26 00:59:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:59:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-11-26 00:59:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:31,499 INFO L225 Difference]: With dead ends: 51 [2022-11-26 00:59:31,499 INFO L226 Difference]: Without dead ends: 44 [2022-11-26 00:59:31,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:59:31,500 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:31,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 60 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:59:31,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-26 00:59:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-11-26 00:59:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:59:31,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 56 transitions. [2022-11-26 00:59:31,534 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 56 transitions. Word has length 33 [2022-11-26 00:59:31,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:31,535 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 56 transitions. [2022-11-26 00:59:31,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:59:31,535 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 56 transitions. [2022-11-26 00:59:31,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:59:31,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:31,536 INFO L195 NwaCegarLoop]: 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, 1] [2022-11-26 00:59:31,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:31,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:59:31,742 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:59:31,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:31,742 INFO L85 PathProgramCache]: Analyzing trace with hash -2093960801, now seen corresponding path program 1 times [2022-11-26 00:59:31,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:31,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287281393] [2022-11-26 00:59:31,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:31,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:59:33,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:33,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287281393] [2022-11-26 00:59:33,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287281393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:33,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599320224] [2022-11-26 00:59:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:33,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:33,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:33,870 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:33,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:59:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:33,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-26 00:59:33,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:34,009 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:59:34,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:59:34,127 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:59:34,127 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:59:34,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:59:34,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-26 00:59:34,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-26 00:59:34,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 56 [2022-11-26 00:59:34,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 66 [2022-11-26 00:59:34,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 86 [2022-11-26 00:59:35,663 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 189 [2022-11-26 00:59:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:59:35,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:01:41,553 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_upsweep_~left~0#1| Int) (|ULTIMATE.start_check_~a0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_19| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|ULTIMATE.start_upsweep_~a#1.offset| Int) (|v_ULTIMATE.start_downsweep_~n#1_19| Int) (v_ArrVal_316 Int)) (let ((.cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (let ((.cse7 (store (select |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (store .cse7 (+ |ULTIMATE.start_main_~a0~0#1.offset| 4) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse7) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4)))))) (let ((.cse3 (store (let ((.cse5 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_19| 4) |ULTIMATE.start_upsweep_~a#1.offset|))) (store .cse5 .cse6 (+ (select .cse5 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (select .cse5 .cse6)))) (+ (* |v_ULTIMATE.start_downsweep_~n#1_19| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_316))) (let ((.cse0 (select .cse3 .cse4))) (or (not (= .cse0 0)) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (= .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse3 .cse4 (+ .cse0 .cse1)) |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_check_~a0#1.offset|))) (< |v_ULTIMATE.start_downsweep_~n#1_19| 2))))))) is different from false [2022-11-26 01:01:43,663 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_upsweep_~left~0#1| Int) (|ULTIMATE.start_check_~a0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_19| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|ULTIMATE.start_upsweep_~a#1.offset| Int) (|v_ULTIMATE.start_downsweep_~n#1_19| Int) (v_ArrVal_316 Int)) (let ((.cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (let ((.cse7 (let ((.cse8 ((as const (Array Int Int)) 0))) (store .cse8 |ULTIMATE.start_main_~a0~0#1.offset| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse8) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))))) (store .cse7 (+ |ULTIMATE.start_main_~a0~0#1.offset| 4) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse7) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4)))))) (let ((.cse3 (store (let ((.cse5 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_19| 4) |ULTIMATE.start_upsweep_~a#1.offset|))) (store .cse5 .cse6 (+ (select .cse5 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (select .cse5 .cse6)))) (+ (* |v_ULTIMATE.start_downsweep_~n#1_19| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_316))) (let ((.cse0 (select .cse3 .cse4))) (or (not (= .cse0 0)) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (= .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse3 .cse4 (+ .cse1 .cse0)) |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_check_~a0#1.offset|))) (< |v_ULTIMATE.start_downsweep_~n#1_19| 2))))))) is different from false [2022-11-26 01:01:43,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599320224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:01:43,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2090472912] [2022-11-26 01:01:43,675 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-26 01:01:43,676 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:01:43,676 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:01:43,676 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:01:43,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:01:43,941 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-26 01:01:43,948 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:01:43,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 01:01:44,079 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 01:01:44,080 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 01:01:44,113 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:01:44,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 01:01:44,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 01:01:44,213 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 01:01:44,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 01:01:44,310 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 01:01:44,406 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-26 01:01:44,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-26 01:01:44,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:44,459 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 01:01:44,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 01:01:44,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:44,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-11-26 01:01:44,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:44,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 01:01:44,730 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-11-26 01:01:44,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 56 [2022-11-26 01:01:44,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 01:01:44,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:44,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:44,886 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 01:01:44,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 76 [2022-11-26 01:01:44,977 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-11-26 01:01:44,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-11-26 01:01:45,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:45,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:45,153 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 01:01:45,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 178 [2022-11-26 01:01:45,282 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-11-26 01:01:45,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-11-26 01:01:45,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:45,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:45,904 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 01:01:45,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 178 [2022-11-26 01:01:46,051 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-11-26 01:01:46,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-11-26 01:01:46,161 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 01:01:46,190 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 01:01:46,191 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:01:56,771 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4015#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-11-26 01:01:56,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:01:56,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:01:56,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 41 [2022-11-26 01:01:56,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842008458] [2022-11-26 01:01:56,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:01:56,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-26 01:01:56,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:56,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-26 01:01:56,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=5330, Unknown=46, NotChecked=298, Total=6006 [2022-11-26 01:01:56,774 INFO L87 Difference]: Start difference. First operand 42 states and 56 transitions. Second operand has 41 states, 35 states have (on average 1.4) internal successors, (49), 37 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-26 01:02:11,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:11,962 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2022-11-26 01:02:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-26 01:02:11,963 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 35 states have (on average 1.4) internal successors, (49), 37 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2022-11-26 01:02:11,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:11,964 INFO L225 Difference]: With dead ends: 104 [2022-11-26 01:02:11,964 INFO L226 Difference]: Without dead ends: 102 [2022-11-26 01:02:11,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3780 ImplicationChecksByTransitivity, 153.2s TimeCoverageRelationStatistics Valid=1645, Invalid=13323, Unknown=46, NotChecked=486, Total=15500 [2022-11-26 01:02:11,969 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 586 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:11,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 121 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 01:02:11,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-26 01:02:12,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 45. [2022-11-26 01:02:12,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 01:02:12,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2022-11-26 01:02:12,019 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 36 [2022-11-26 01:02:12,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:12,020 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2022-11-26 01:02:12,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 35 states have (on average 1.4) internal successors, (49), 37 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-26 01:02:12,020 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2022-11-26 01:02:12,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 01:02:12,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:12,021 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1] [2022-11-26 01:02:12,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:12,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 01:02:12,227 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:12,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:12,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1076410105, now seen corresponding path program 2 times [2022-11-26 01:02:12,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:12,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084711053] [2022-11-26 01:02:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:12,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 01:02:12,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:12,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084711053] [2022-11-26 01:02:12,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084711053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:12,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667974054] [2022-11-26 01:02:12,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:02:12,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:12,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:12,494 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:12,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 01:02:12,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 01:02:12,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:02:12,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 01:02:12,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 01:02:12,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 01:02:12,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667974054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:12,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [590162669] [2022-11-26 01:02:12,905 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-26 01:02:12,905 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:12,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:12,905 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:12,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:13,233 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:02:13,242 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-26 01:02:13,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 01:02:13,387 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 01:02:13,387 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 01:02:13,424 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:02:13,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 01:02:13,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 01:02:13,539 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 01:02:13,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 01:02:13,637 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 01:02:13,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 01:02:13,779 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 01:02:13,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 241 treesize of output 238 [2022-11-26 01:02:13,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:13,851 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 01:02:13,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 01:02:13,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:13,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-11-26 01:02:14,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:14,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 01:02:14,188 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-11-26 01:02:14,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 56 [2022-11-26 01:02:14,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 01:02:14,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:14,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:14,394 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 01:02:14,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 78 [2022-11-26 01:02:14,494 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-11-26 01:02:14,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-11-26 01:02:14,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:14,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:14,715 INFO L321 Elim1Store]: treesize reduction 23, result has 58.9 percent of original size [2022-11-26 01:02:14,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 169 treesize of output 166 [2022-11-26 01:02:14,886 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-11-26 01:02:14,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-11-26 01:02:15,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:15,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:15,591 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 01:02:15,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 178 [2022-11-26 01:02:15,769 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-11-26 01:02:15,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-11-26 01:02:15,905 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 01:02:15,934 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 01:02:15,936 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:23,955 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4618#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-11-26 01:02:23,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:23,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:02:23,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-11-26 01:02:23,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353109002] [2022-11-26 01:02:23,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:23,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-26 01:02:23,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:23,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-26 01:02:23,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 01:02:23,958 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 01:02:24,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:24,201 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2022-11-26 01:02:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 01:02:24,201 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2022-11-26 01:02:24,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:24,202 INFO L225 Difference]: With dead ends: 63 [2022-11-26 01:02:24,202 INFO L226 Difference]: Without dead ends: 37 [2022-11-26 01:02:24,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2022-11-26 01:02:24,204 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:24,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 146 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:02:24,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-26 01:02:24,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-26 01:02:24,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 01:02:24,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-11-26 01:02:24,232 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 39 [2022-11-26 01:02:24,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:24,232 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-11-26 01:02:24,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 01:02:24,233 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-11-26 01:02:24,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 01:02:24,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:24,234 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-26 01:02:24,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:24,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:24,440 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:24,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:24,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1395606775, now seen corresponding path program 3 times [2022-11-26 01:02:24,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:24,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627011831] [2022-11-26 01:02:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:24,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 01:02:24,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:24,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627011831] [2022-11-26 01:02:24,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627011831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:24,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719552926] [2022-11-26 01:02:24,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:02:24,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:24,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:24,681 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:24,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 01:02:24,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:02:24,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:02:24,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 01:02:24,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 01:02:24,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 01:02:25,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719552926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:25,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [35364699] [2022-11-26 01:02:25,064 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-26 01:02:25,064 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:25,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:25,065 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:25,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:25,323 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-26 01:02:25,330 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:02:25,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 01:02:25,481 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 01:02:25,482 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 01:02:25,515 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:02:25,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 01:02:25,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 01:02:25,620 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 01:02:25,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 01:02:25,732 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 01:02:25,802 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-26 01:02:25,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-26 01:02:25,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:25,859 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 01:02:25,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 01:02:25,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:25,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 01:02:26,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:26,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 01:02:26,138 INFO L321 Elim1Store]: treesize reduction 23, result has 57.4 percent of original size [2022-11-26 01:02:26,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 44 [2022-11-26 01:02:26,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 01:02:26,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:26,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:26,285 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 01:02:26,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 76 [2022-11-26 01:02:26,375 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-11-26 01:02:26,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-11-26 01:02:26,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:26,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:26,542 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 01:02:26,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 178 [2022-11-26 01:02:26,681 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-11-26 01:02:26,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-11-26 01:02:27,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:27,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:27,288 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 01:02:27,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 180 [2022-11-26 01:02:27,448 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-11-26 01:02:27,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-11-26 01:02:27,585 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 01:02:27,608 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 01:02:27,610 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:33,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5062#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-11-26 01:02:33,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:33,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:02:33,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-26 01:02:33,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955789826] [2022-11-26 01:02:33,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:33,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 01:02:33,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:33,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 01:02:33,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 01:02:33,528 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 01:02:33,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:33,804 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-11-26 01:02:33,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 01:02:33,804 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2022-11-26 01:02:33,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:33,805 INFO L225 Difference]: With dead ends: 57 [2022-11-26 01:02:33,805 INFO L226 Difference]: Without dead ends: 41 [2022-11-26 01:02:33,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=231, Invalid=1661, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 01:02:33,807 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 66 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:33,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 147 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:02:33,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-26 01:02:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-26 01:02:33,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 01:02:33,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-11-26 01:02:33,837 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 40 [2022-11-26 01:02:33,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:33,837 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-11-26 01:02:33,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 01:02:33,838 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-11-26 01:02:33,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-26 01:02:33,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:33,839 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-26 01:02:33,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:34,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 01:02:34,043 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:34,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:34,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1251303248, now seen corresponding path program 4 times [2022-11-26 01:02:34,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:34,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276527103] [2022-11-26 01:02:34,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:34,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-26 01:02:34,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:34,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276527103] [2022-11-26 01:02:34,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276527103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:34,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006804039] [2022-11-26 01:02:34,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 01:02:34,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:34,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:34,260 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:34,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 01:02:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:34,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 01:02:34,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-26 01:02:34,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-26 01:02:34,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006804039] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:34,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1609034638] [2022-11-26 01:02:34,589 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-26 01:02:34,590 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:34,590 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:34,591 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:34,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:34,878 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:02:34,885 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-26 01:02:34,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 01:02:35,007 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 01:02:35,008 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 01:02:35,046 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:02:35,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 01:02:35,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 01:02:35,147 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 01:02:35,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 01:02:35,249 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 01:02:35,316 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-26 01:02:35,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-26 01:02:35,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:35,377 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 01:02:35,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 01:02:35,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:35,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 01:02:35,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:35,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 01:02:35,691 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-11-26 01:02:35,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 56 [2022-11-26 01:02:35,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 01:02:35,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:35,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:35,856 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 01:02:35,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 76 [2022-11-26 01:02:35,945 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-11-26 01:02:35,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-11-26 01:02:36,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:36,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:36,103 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 01:02:36,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 178 [2022-11-26 01:02:36,239 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-11-26 01:02:36,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-11-26 01:02:36,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:36,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:36,873 INFO L321 Elim1Store]: treesize reduction 23, result has 58.9 percent of original size [2022-11-26 01:02:36,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 169 treesize of output 166 [2022-11-26 01:02:37,024 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-11-26 01:02:37,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-11-26 01:02:37,160 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 01:02:37,182 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 01:02:37,184 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:44,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5524#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-11-26 01:02:44,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:44,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:02:44,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 9 [2022-11-26 01:02:44,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387718397] [2022-11-26 01:02:44,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:44,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 01:02:44,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:44,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 01:02:44,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-11-26 01:02:44,572 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 01:02:44,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:44,765 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2022-11-26 01:02:44,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:02:44,765 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-11-26 01:02:44,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:44,767 INFO L225 Difference]: With dead ends: 58 [2022-11-26 01:02:44,767 INFO L226 Difference]: Without dead ends: 48 [2022-11-26 01:02:44,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 01:02:44,768 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:44,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 107 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:02:44,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-26 01:02:44,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-11-26 01:02:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 01:02:44,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-11-26 01:02:44,808 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 44 [2022-11-26 01:02:44,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:44,808 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-11-26 01:02:44,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 01:02:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-11-26 01:02:44,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-26 01:02:44,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:44,810 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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] [2022-11-26 01:02:44,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:45,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 01:02:45,010 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:45,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:45,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1841884544, now seen corresponding path program 5 times [2022-11-26 01:02:45,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:45,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160110576] [2022-11-26 01:02:45,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:45,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 01:02:45,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:45,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160110576] [2022-11-26 01:02:45,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160110576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:45,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857276651] [2022-11-26 01:02:45,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:02:45,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:45,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:45,355 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:45,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 01:02:45,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 01:02:45,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:02:45,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 01:02:45,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-26 01:02:46,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-26 01:02:46,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857276651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:46,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1070150754] [2022-11-26 01:02:46,518 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-26 01:02:46,518 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:46,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:46,518 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:46,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:46,762 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:02:46,775 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-26 01:02:46,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 01:02:46,897 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 01:02:46,897 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 01:02:46,925 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:02:46,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 01:02:47,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 01:02:47,044 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 01:02:47,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 01:02:47,132 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 01:02:47,201 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-26 01:02:47,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-26 01:02:47,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:47,262 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 01:02:47,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 01:02:47,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:47,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-11-26 01:02:47,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:47,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 01:02:47,525 INFO L321 Elim1Store]: treesize reduction 23, result has 57.4 percent of original size [2022-11-26 01:02:47,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 44 [2022-11-26 01:02:47,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 01:02:47,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:47,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:47,669 INFO L321 Elim1Store]: treesize reduction 23, result has 58.9 percent of original size [2022-11-26 01:02:47,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 64 [2022-11-26 01:02:47,745 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-11-26 01:02:47,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-11-26 01:02:47,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:47,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:47,920 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-26 01:02:47,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 178 [2022-11-26 01:02:48,060 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-11-26 01:02:48,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-11-26 01:02:48,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:48,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:48,782 INFO L321 Elim1Store]: treesize reduction 23, result has 58.9 percent of original size [2022-11-26 01:02:48,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 169 treesize of output 166 [2022-11-26 01:02:48,911 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-11-26 01:02:48,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-11-26 01:02:49,018 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 01:02:49,044 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 01:02:49,045 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:57,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6016#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-11-26 01:02:57,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:57,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:02:57,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 27 [2022-11-26 01:02:57,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854547386] [2022-11-26 01:02:57,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:57,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 01:02:57,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:57,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 01:02:57,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2022-11-26 01:02:57,455 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-26 01:02:58,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:58,392 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2022-11-26 01:02:58,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 01:02:58,393 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-26 01:02:58,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:58,394 INFO L225 Difference]: With dead ends: 104 [2022-11-26 01:02:58,395 INFO L226 Difference]: Without dead ends: 80 [2022-11-26 01:02:58,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=364, Invalid=3176, Unknown=0, NotChecked=0, Total=3540 [2022-11-26 01:02:58,396 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 83 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:58,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 259 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:02:58,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-26 01:02:58,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 44. [2022-11-26 01:02:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 01:02:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2022-11-26 01:02:58,454 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 46 [2022-11-26 01:02:58,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:58,455 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2022-11-26 01:02:58,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-26 01:02:58,455 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2022-11-26 01:02:58,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-26 01:02:58,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:58,456 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 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] [2022-11-26 01:02:58,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:58,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:58,663 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:58,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:58,663 INFO L85 PathProgramCache]: Analyzing trace with hash -458579056, now seen corresponding path program 6 times [2022-11-26 01:02:58,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:58,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959598794] [2022-11-26 01:02:58,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:58,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 01:02:58,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:58,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959598794] [2022-11-26 01:02:58,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959598794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:58,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480219580] [2022-11-26 01:02:58,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:02:58,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:58,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:58,964 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:58,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 01:02:59,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:02:59,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:02:59,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 01:02:59,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 01:02:59,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 01:02:59,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480219580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:59,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448220311] [2022-11-26 01:02:59,550 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-26 01:02:59,550 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:59,551 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:59,551 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:59,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:59,886 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-26 01:02:59,903 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:02:59,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 01:03:00,045 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 01:03:00,045 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 01:03:00,074 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:03:00,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 01:03:00,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 01:03:00,182 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 01:03:00,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 01:03:00,304 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 01:03:00,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 01:03:00,417 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 01:03:00,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 235 treesize of output 232 [2022-11-26 01:03:00,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:00,493 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 01:03:00,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 01:03:00,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:00,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 01:03:00,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:00,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:03:00,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 01:03:00,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:00,658 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:03:00,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 01:03:00,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 01:03:00,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:00,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:00,820 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 01:03:00,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 78 [2022-11-26 01:03:00,931 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-11-26 01:03:00,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-11-26 01:03:01,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:01,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:03:01,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 31 [2022-11-26 01:03:01,159 INFO L321 Elim1Store]: treesize reduction 108, result has 41.0 percent of original size [2022-11-26 01:03:01,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 153 [2022-11-26 01:03:01,290 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-11-26 01:03:01,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-11-26 01:03:01,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:01,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:03:01,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 31 [2022-11-26 01:03:01,774 INFO L321 Elim1Store]: treesize reduction 108, result has 41.0 percent of original size [2022-11-26 01:03:01,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 149 [2022-11-26 01:03:01,929 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-11-26 01:03:01,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-11-26 01:03:02,116 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 01:03:02,146 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 01:03:02,147 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:03:07,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6604#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-11-26 01:03:07,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:03:07,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:03:07,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2022-11-26 01:03:07,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731686005] [2022-11-26 01:03:07,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:03:07,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 01:03:07,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:07,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 01:03:07,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 01:03:07,606 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 01:03:07,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:07,917 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2022-11-26 01:03:07,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 01:03:07,918 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2022-11-26 01:03:07,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:07,919 INFO L225 Difference]: With dead ends: 59 [2022-11-26 01:03:07,919 INFO L226 Difference]: Without dead ends: 49 [2022-11-26 01:03:07,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 108 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=234, Invalid=1658, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 01:03:07,920 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:07,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 157 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:03:07,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-26 01:03:07,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2022-11-26 01:03:07,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 01:03:07,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-11-26 01:03:07,967 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 47 [2022-11-26 01:03:07,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:07,968 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-11-26 01:03:07,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 01:03:07,968 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-11-26 01:03:07,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-26 01:03:07,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:07,969 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 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] [2022-11-26 01:03:07,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 01:03:08,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 01:03:08,176 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:08,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:08,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1305280003, now seen corresponding path program 7 times [2022-11-26 01:03:08,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:08,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200726231] [2022-11-26 01:03:08,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:08,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 01:03:08,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:08,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200726231] [2022-11-26 01:03:08,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200726231] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:03:08,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408980647] [2022-11-26 01:03:08,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 01:03:08,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:08,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:08,568 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:08,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 01:03:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:08,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 01:03:08,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 01:03:08,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:03:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 01:03:09,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408980647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:03:09,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [292718277] [2022-11-26 01:03:09,086 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-26 01:03:09,086 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:03:09,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:03:09,086 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:03:09,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:03:09,459 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-26 01:03:09,465 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:03:09,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 01:03:09,613 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 01:03:09,613 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 01:03:09,651 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:03:09,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 01:03:09,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 01:03:09,764 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 01:03:09,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 01:03:09,901 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 01:03:09,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 01:03:10,047 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-26 01:03:10,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 235 treesize of output 232 [2022-11-26 01:03:10,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:10,120 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 01:03:10,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 01:03:10,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:10,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-11-26 01:03:10,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:10,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:03:10,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 01:03:10,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:10,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:03:10,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 01:03:10,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 01:03:10,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:10,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:10,491 INFO L321 Elim1Store]: treesize reduction 23, result has 58.9 percent of original size [2022-11-26 01:03:10,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 64 [2022-11-26 01:03:10,608 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-11-26 01:03:10,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-11-26 01:03:10,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:10,728 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:03:10,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 29 [2022-11-26 01:03:10,894 INFO L321 Elim1Store]: treesize reduction 90, result has 45.5 percent of original size [2022-11-26 01:03:10,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 149 [2022-11-26 01:03:11,062 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-11-26 01:03:11,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-11-26 01:03:11,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:11,339 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:03:11,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 29 [2022-11-26 01:03:11,479 INFO L321 Elim1Store]: treesize reduction 90, result has 45.5 percent of original size [2022-11-26 01:03:11,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 149 [2022-11-26 01:03:11,609 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-11-26 01:03:11,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-11-26 01:03:11,744 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 01:03:11,781 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 01:03:11,782 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:03:16,970 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7112#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-11-26 01:03:16,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:03:16,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:03:16,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 21 [2022-11-26 01:03:16,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172529748] [2022-11-26 01:03:16,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:03:16,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 01:03:16,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:16,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 01:03:16,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 01:03:16,972 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 01:03:17,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:17,430 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2022-11-26 01:03:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 01:03:17,431 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2022-11-26 01:03:17,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:17,431 INFO L225 Difference]: With dead ends: 83 [2022-11-26 01:03:17,431 INFO L226 Difference]: Without dead ends: 68 [2022-11-26 01:03:17,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 108 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=258, Invalid=2094, Unknown=0, NotChecked=0, Total=2352 [2022-11-26 01:03:17,432 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:17,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 164 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:03:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-26 01:03:17,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2022-11-26 01:03:17,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 01:03:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2022-11-26 01:03:17,489 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 48 [2022-11-26 01:03:17,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:17,490 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2022-11-26 01:03:17,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 01:03:17,490 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2022-11-26 01:03:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-26 01:03:17,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:17,490 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 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] [2022-11-26 01:03:17,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-26 01:03:17,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 01:03:17,691 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:17,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:17,692 INFO L85 PathProgramCache]: Analyzing trace with hash 705103376, now seen corresponding path program 8 times [2022-11-26 01:03:17,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:17,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19825937] [2022-11-26 01:03:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:17,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-26 01:03:18,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:18,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19825937] [2022-11-26 01:03:18,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19825937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:03:18,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868008042] [2022-11-26 01:03:18,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:03:18,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:18,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:18,187 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:18,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-26 01:03:18,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 01:03:18,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:03:18,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 01:03:18,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 01:03:19,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:03:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 01:03:19,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868008042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:03:19,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [863739852] [2022-11-26 01:03:19,434 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-26 01:03:19,434 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:03:19,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:03:19,435 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:03:19,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:03:19,619 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:03:19,624 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-11-26 01:03:19,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 01:03:19,766 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-26 01:03:19,767 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-26 01:03:19,799 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:03:19,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-26 01:03:19,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 01:03:19,970 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 01:03:20,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-26 01:03:20,078 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 01:03:20,145 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-26 01:03:20,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-26 01:03:20,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:20,202 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 01:03:20,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 01:03:20,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 01:03:20,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-26 01:03:20,503 INFO L321 Elim1Store]: treesize reduction 23, result has 57.4 percent of original size [2022-11-26 01:03:20,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 44 [2022-11-26 01:03:20,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 01:03:20,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,652 INFO L321 Elim1Store]: treesize reduction 23, result has 58.9 percent of original size [2022-11-26 01:03:20,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 64 [2022-11-26 01:03:20,735 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-11-26 01:03:20,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-11-26 01:03:20,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,909 INFO L321 Elim1Store]: treesize reduction 23, result has 58.9 percent of original size [2022-11-26 01:03:20,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 169 treesize of output 166 [2022-11-26 01:03:21,042 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-11-26 01:03:21,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-11-26 01:03:21,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:21,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:21,500 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 01:03:21,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 180 [2022-11-26 01:03:21,637 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-11-26 01:03:21,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-11-26 01:03:21,767 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-26 01:03:21,794 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 01:03:21,795 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:03:31,486 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7698#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-11-26 01:03:31,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:03:31,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:03:31,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-11-26 01:03:31,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889922896] [2022-11-26 01:03:31,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:03:31,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-26 01:03:31,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:31,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-26 01:03:31,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2022-11-26 01:03:31,490 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand has 28 states, 25 states have (on average 1.96) internal successors, (49), 28 states have internal predecessors, (49), 6 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-26 01:03:34,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:34,024 INFO L93 Difference]: Finished difference Result 243 states and 339 transitions. [2022-11-26 01:03:34,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-26 01:03:34,025 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.96) internal successors, (49), 28 states have internal predecessors, (49), 6 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) Word has length 49 [2022-11-26 01:03:34,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:34,028 INFO L225 Difference]: With dead ends: 243 [2022-11-26 01:03:34,028 INFO L226 Difference]: Without dead ends: 207 [2022-11-26 01:03:34,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=670, Invalid=4586, Unknown=0, NotChecked=0, Total=5256 [2022-11-26 01:03:34,030 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 232 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:34,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 432 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 01:03:34,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-26 01:03:34,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 77. [2022-11-26 01:03:34,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 64 states have (on average 1.3125) internal successors, (84), 64 states have internal predecessors, (84), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:03:34,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 104 transitions. [2022-11-26 01:03:34,126 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 104 transitions. Word has length 49 [2022-11-26 01:03:34,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:34,127 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 104 transitions. [2022-11-26 01:03:34,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.96) internal successors, (49), 28 states have internal predecessors, (49), 6 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-26 01:03:34,127 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 104 transitions. [2022-11-26 01:03:34,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 01:03:34,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:34,128 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 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] [2022-11-26 01:03:34,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-26 01:03:34,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:34,328 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:34,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:34,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1214687543, now seen corresponding path program 9 times [2022-11-26 01:03:34,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:34,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682923666] [2022-11-26 01:03:34,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:34,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 01:03:42,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:42,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682923666] [2022-11-26 01:03:42,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682923666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:03:42,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935392153] [2022-11-26 01:03:42,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:03:42,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:42,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:42,632 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:42,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e854f12-505c-4022-8fe2-ab0aa9e24a69/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-26 01:03:42,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:03:42,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:03:42,984 WARN L261 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 175 conjunts are in the unsatisfiable core [2022-11-26 01:03:42,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:42,996 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:03:43,113 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 01:03:43,114 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:03:43,422 INFO L350 Elim1Store]: Elim1 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 25 [2022-11-26 01:03:43,555 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 01:03:43,670 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 01:03:44,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:44,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:44,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 39 [2022-11-26 01:03:44,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:44,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:44,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:44,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 51 [2022-11-26 01:03:44,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:44,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:44,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:44,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-26 01:03:45,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,078 INFO L321 Elim1Store]: treesize reduction 38, result has 49.3 percent of original size [2022-11-26 01:03:45,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 63 [2022-11-26 01:03:45,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:45,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 67 [2022-11-26 01:03:46,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:46,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:46,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:46,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:46,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 51 [2022-11-26 01:03:46,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:46,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:46,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:46,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:46,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:46,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 51 [2022-11-26 01:03:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 01:03:47,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:04:14,070 INFO L321 Elim1Store]: treesize reduction 383, result has 41.3 percent of original size [2022-11-26 01:04:14,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 706654456234 treesize of output 359988939446