./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 07:35:44,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:35:44,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:35:44,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:35:44,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:35:44,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:35:44,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:35:44,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:35:44,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:35:44,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:35:44,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:35:44,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:35:44,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:35:44,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:35:44,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:35:44,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:35:44,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:35:44,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:35:44,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:35:44,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:35:44,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:35:44,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:35:44,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:35:44,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:35:44,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:35:44,788 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:35:44,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:35:44,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:35:44,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:35:44,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:35:44,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:35:44,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:35:44,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:35:44,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:35:44,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:35:44,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:35:44,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:35:44,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:35:44,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:35:44,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:35:44,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:35:44,795 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:35:44,816 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:35:44,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:35:44,817 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:35:44,817 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:35:44,818 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:35:44,818 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:35:44,818 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:35:44,818 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:35:44,819 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:35:44,819 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:35:44,819 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:35:44,819 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:35:44,819 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:35:44,819 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:35:44,820 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:35:44,820 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:35:44,820 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:35:44,820 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:35:44,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:35:44,821 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:35:44,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:35:44,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:35:44,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:35:44,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:35:44,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:35:44,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:35:44,822 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:35:44,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:35:44,823 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:35:44,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:35:44,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:35:44,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:35:44,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:35:44,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:35:44,824 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:35:44,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:35:44,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:35:44,824 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:35:44,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:35:44,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:35:44,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:35:44,825 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_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 [2022-12-14 07:35:45,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:35:45,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:35:45,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:35:45,066 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:35:45,067 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:35:45,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2022-12-14 07:35:47,634 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:35:47,785 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:35:47,785 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2022-12-14 07:35:47,791 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/data/525becf2e/ac0e6b2b371d4187be1d941f60636d72/FLAG5d8bf67b1 [2022-12-14 07:35:47,803 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/data/525becf2e/ac0e6b2b371d4187be1d941f60636d72 [2022-12-14 07:35:47,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:35:47,807 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:35:47,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:35:47,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:35:47,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:35:47,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:35:47" (1/1) ... [2022-12-14 07:35:47,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ca56476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47, skipping insertion in model container [2022-12-14 07:35:47,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:35:47" (1/1) ... [2022-12-14 07:35:47,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:35:47,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:35:47,971 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_d1d98622-75b2-4390-b171-eced062e7c7b/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2022-12-14 07:35:47,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:35:47,986 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:35:48,001 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_d1d98622-75b2-4390-b171-eced062e7c7b/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2022-12-14 07:35:48,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:35:48,015 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:35:48,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:48 WrapperNode [2022-12-14 07:35:48,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:35:48,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:35:48,016 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:35:48,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:35:48,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:48" (1/1) ... [2022-12-14 07:35:48,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:48" (1/1) ... [2022-12-14 07:35:48,039 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2022-12-14 07:35:48,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:35:48,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:35:48,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:35:48,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:35:48,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:48" (1/1) ... [2022-12-14 07:35:48,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:48" (1/1) ... [2022-12-14 07:35:48,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:48" (1/1) ... [2022-12-14 07:35:48,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:48" (1/1) ... [2022-12-14 07:35:48,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:48" (1/1) ... [2022-12-14 07:35:48,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:48" (1/1) ... [2022-12-14 07:35:48,059 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:48" (1/1) ... [2022-12-14 07:35:48,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:48" (1/1) ... [2022-12-14 07:35:48,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:35:48,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:35:48,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:35:48,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:35:48,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:48" (1/1) ... [2022-12-14 07:35:48,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:35:48,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:35:48,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:35:48,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:35:48,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:35:48,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:35:48,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:35:48,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:35:48,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:35:48,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:35:48,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 07:35:48,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:35:48,179 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:35:48,180 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:35:48,282 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:35:48,299 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:35:48,299 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 07:35:48,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:35:48 BoogieIcfgContainer [2022-12-14 07:35:48,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:35:48,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:35:48,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:35:48,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:35:48,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:35:47" (1/3) ... [2022-12-14 07:35:48,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b56e7c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:35:48, skipping insertion in model container [2022-12-14 07:35:48,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:48" (2/3) ... [2022-12-14 07:35:48,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b56e7c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:35:48, skipping insertion in model container [2022-12-14 07:35:48,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:35:48" (3/3) ... [2022-12-14 07:35:48,308 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2022-12-14 07:35:48,322 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:35:48,323 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:35:48,357 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:35:48,362 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;@12552724, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:35:48,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:35:48,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:48,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 07:35:48,370 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:48,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:48,371 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:48,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:48,375 INFO L85 PathProgramCache]: Analyzing trace with hash 272684364, now seen corresponding path program 1 times [2022-12-14 07:35:48,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:48,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231825001] [2022-12-14 07:35:48,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:48,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:35:48,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:48,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231825001] [2022-12-14 07:35:48,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231825001] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:35:48,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:35:48,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:35:48,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901187343] [2022-12-14 07:35:48,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:35:48,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:35:48,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:48,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:35:48,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:35:48,560 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:48,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:48,583 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2022-12-14 07:35:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:35:48,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 07:35:48,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:48,591 INFO L225 Difference]: With dead ends: 21 [2022-12-14 07:35:48,591 INFO L226 Difference]: Without dead ends: 10 [2022-12-14 07:35:48,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:35:48,595 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:48,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:35:48,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-14 07:35:48,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-12-14 07:35:48,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:48,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-12-14 07:35:48,618 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2022-12-14 07:35:48,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:48,619 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-12-14 07:35:48,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:48,619 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-12-14 07:35:48,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 07:35:48,619 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:48,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:48,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:35:48,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:48,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:48,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2077770057, now seen corresponding path program 1 times [2022-12-14 07:35:48,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:48,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398126316] [2022-12-14 07:35:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:48,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:35:48,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:48,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398126316] [2022-12-14 07:35:48,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398126316] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:35:48,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654946564] [2022-12-14 07:35:48,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:48,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:35:48,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:35:48,689 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:35:48,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:35:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:48,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:35:48,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:35:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:35:48,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:35:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:35:48,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654946564] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:35:48,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1333290860] [2022-12-14 07:35:48,830 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 07:35:48,830 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:35:48,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:35:48,839 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:35:48,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:35:48,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:48,948 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 07:35:48,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-12-14 07:35:48,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:49,002 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 07:35:49,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 07:35:49,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:49,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 07:35:49,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:49,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:49,189 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:35:49,190 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 226 treesize of output 225 [2022-12-14 07:35:49,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:35:49,324 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 15 treesize of output 11 [2022-12-14 07:35:49,336 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:35:49,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1333290860] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:35:49,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:35:49,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 12 [2022-12-14 07:35:49,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944882247] [2022-12-14 07:35:49,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:35:49,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:35:49,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:49,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:35:49,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:35:49,522 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:49,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:49,555 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-12-14 07:35:49,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:35:49,556 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 07:35:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:49,556 INFO L225 Difference]: With dead ends: 15 [2022-12-14 07:35:49,556 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 07:35:49,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:35:49,558 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:49,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 4 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:35:49,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 07:35:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 07:35:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-12-14 07:35:49,564 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2022-12-14 07:35:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:49,564 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-12-14 07:35:49,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-12-14 07:35:49,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 07:35:49,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:49,565 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:49,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:35:49,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:35:49,767 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:49,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:49,769 INFO L85 PathProgramCache]: Analyzing trace with hash 420679642, now seen corresponding path program 1 times [2022-12-14 07:35:49,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:49,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568225308] [2022-12-14 07:35:49,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:49,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:35:49,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:49,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568225308] [2022-12-14 07:35:49,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568225308] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:35:49,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544334227] [2022-12-14 07:35:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:49,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:35:49,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:35:49,934 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:35:49,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:35:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:49,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:35:49,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:35:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:35:49,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:35:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:35:49,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544334227] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:35:49,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1700891647] [2022-12-14 07:35:50,002 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 07:35:50,002 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:35:50,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:35:50,002 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:35:50,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:35:50,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:50,045 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 07:35:50,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 07:35:50,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:50,063 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 22 treesize of output 30 [2022-12-14 07:35:50,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:50,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 07:35:50,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:50,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:50,148 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 07:35:50,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 236 treesize of output 224 [2022-12-14 07:35:50,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:35:50,217 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 15 treesize of output 11 [2022-12-14 07:35:50,314 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:35:50,651 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '220#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:35:50,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:35:50,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:35:50,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 07:35:50,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947617347] [2022-12-14 07:35:50,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:35:50,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:35:50,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:50,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:35:50,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:35:50,654 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:50,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:50,666 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-12-14 07:35:50,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:35:50,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 07:35:50,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:50,666 INFO L225 Difference]: With dead ends: 24 [2022-12-14 07:35:50,667 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 07:35:50,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:35:50,667 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:50,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:35:50,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 07:35:50,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 07:35:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-12-14 07:35:50,671 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-12-14 07:35:50,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:50,672 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-12-14 07:35:50,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-12-14 07:35:50,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 07:35:50,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:50,673 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:50,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 07:35:50,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:35:50,875 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:50,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:50,876 INFO L85 PathProgramCache]: Analyzing trace with hash 55551983, now seen corresponding path program 2 times [2022-12-14 07:35:50,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:50,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995558001] [2022-12-14 07:35:50,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:50,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:35:51,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:51,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995558001] [2022-12-14 07:35:51,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995558001] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:35:51,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577395661] [2022-12-14 07:35:51,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:35:51,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:35:51,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:35:51,105 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:35:51,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:35:51,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 07:35:51,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:35:51,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 07:35:51,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:35:51,162 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 15 treesize of output 11 [2022-12-14 07:35:51,185 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:35:51,186 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 23 treesize of output 19 [2022-12-14 07:35:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:35:51,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:35:51,291 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 18 treesize of output 16 [2022-12-14 07:35:51,296 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 26 treesize of output 20 [2022-12-14 07:35:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:35:51,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577395661] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:35:51,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1982397644] [2022-12-14 07:35:51,306 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 07:35:51,306 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:35:51,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:35:51,307 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:35:51,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:35:51,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:51,338 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 07:35:51,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-12-14 07:35:51,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:51,369 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 07:35:51,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 07:35:51,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:51,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 07:35:51,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:51,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:51,461 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:35:51,462 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 226 treesize of output 225 [2022-12-14 07:35:51,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:35:51,547 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 15 treesize of output 11 [2022-12-14 07:35:51,607 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:35:51,976 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '376#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:35:51,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:35:51,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:35:51,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2022-12-14 07:35:51,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414812760] [2022-12-14 07:35:51,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:35:51,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 07:35:51,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:51,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 07:35:51,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-12-14 07:35:51,978 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:52,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:52,099 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-12-14 07:35:52,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 07:35:52,099 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 07:35:52,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:52,100 INFO L225 Difference]: With dead ends: 31 [2022-12-14 07:35:52,100 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 07:35:52,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2022-12-14 07:35:52,101 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:52,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:35:52,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 07:35:52,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 07:35:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-12-14 07:35:52,107 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2022-12-14 07:35:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:52,107 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-12-14 07:35:52,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:52,107 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-12-14 07:35:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 07:35:52,108 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:52,108 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:52,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 07:35:52,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:35:52,310 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:52,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:52,311 INFO L85 PathProgramCache]: Analyzing trace with hash 960336160, now seen corresponding path program 3 times [2022-12-14 07:35:52,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:52,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858911971] [2022-12-14 07:35:52,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:52,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:35:52,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:52,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858911971] [2022-12-14 07:35:52,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858911971] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:35:52,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899284595] [2022-12-14 07:35:52,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:35:52,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:35:52,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:35:52,514 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:35:52,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:35:52,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:35:52,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:35:52,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:35:52,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:35:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:35:52,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:35:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:35:52,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899284595] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:35:52,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1650479906] [2022-12-14 07:35:52,613 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 07:35:52,613 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:35:52,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:35:52,613 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:35:52,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:35:52,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:52,641 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 07:35:52,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 07:35:52,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:52,650 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 22 treesize of output 30 [2022-12-14 07:35:52,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:52,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 07:35:52,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:52,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:52,730 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:35:52,730 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 226 treesize of output 225 [2022-12-14 07:35:52,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:35:52,821 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 15 treesize of output 11 [2022-12-14 07:35:52,884 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:35:53,175 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '591#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:35:53,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:35:53,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:35:53,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-14 07:35:53,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852465366] [2022-12-14 07:35:53,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:35:53,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 07:35:53,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:53,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 07:35:53,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2022-12-14 07:35:53,178 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:53,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:53,201 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-12-14 07:35:53,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 07:35:53,201 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 07:35:53,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:53,202 INFO L225 Difference]: With dead ends: 40 [2022-12-14 07:35:53,202 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 07:35:53,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2022-12-14 07:35:53,203 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:53,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:35:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 07:35:53,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-14 07:35:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:53,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-12-14 07:35:53,210 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2022-12-14 07:35:53,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:53,210 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-12-14 07:35:53,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:53,210 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-12-14 07:35:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 07:35:53,210 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:53,211 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:53,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 07:35:53,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:35:53,412 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:53,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1415055627, now seen corresponding path program 4 times [2022-12-14 07:35:53,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:53,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768428449] [2022-12-14 07:35:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:53,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:35:53,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:53,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768428449] [2022-12-14 07:35:53,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768428449] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:35:53,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373215353] [2022-12-14 07:35:53,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:35:53,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:35:53,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:35:53,632 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:35:53,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:35:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:53,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:35:53,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:35:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:35:53,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:35:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:35:53,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373215353] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:35:53,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [665891603] [2022-12-14 07:35:53,872 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 07:35:53,873 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:35:53,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:35:53,873 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:35:53,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:35:53,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:53,898 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 07:35:53,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-12-14 07:35:53,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:53,933 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 07:35:53,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 07:35:53,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:53,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 07:35:53,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:53,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:54,014 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:35:54,015 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 226 treesize of output 225 [2022-12-14 07:35:54,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:35:54,073 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 15 treesize of output 11 [2022-12-14 07:35:54,127 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:35:54,431 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '882#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:35:54,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:35:54,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:35:54,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2022-12-14 07:35:54,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64960656] [2022-12-14 07:35:54,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:35:54,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 07:35:54,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:54,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 07:35:54,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=820, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 07:35:54,432 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:54,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:54,463 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-12-14 07:35:54,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 07:35:54,463 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-14 07:35:54,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:54,463 INFO L225 Difference]: With dead ends: 54 [2022-12-14 07:35:54,463 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 07:35:54,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=440, Invalid=820, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 07:35:54,464 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:54,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:35:54,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 07:35:54,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-12-14 07:35:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:54,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-12-14 07:35:54,471 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 26 [2022-12-14 07:35:54,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:54,471 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-12-14 07:35:54,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:54,471 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-12-14 07:35:54,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 07:35:54,471 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:54,471 INFO L195 NwaCegarLoop]: trace histogram [26, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:54,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 07:35:54,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 07:35:54,672 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:54,673 INFO L85 PathProgramCache]: Analyzing trace with hash 410080405, now seen corresponding path program 5 times [2022-12-14 07:35:54,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:54,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675098590] [2022-12-14 07:35:54,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:54,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:35:55,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:55,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675098590] [2022-12-14 07:35:55,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675098590] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:35:55,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856438966] [2022-12-14 07:35:55,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:35:55,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:35:55,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:35:55,186 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:35:55,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:35:55,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 07:35:55,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:35:55,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 07:35:55,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:35:55,275 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 15 treesize of output 11 [2022-12-14 07:35:55,508 INFO L321 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2022-12-14 07:35:55,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 73 [2022-12-14 07:35:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-12-14 07:35:55,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:35:56,018 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 51 treesize of output 45 [2022-12-14 07:35:56,031 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:35:56,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 86 [2022-12-14 07:35:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-12-14 07:35:56,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856438966] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:35:56,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1358944570] [2022-12-14 07:35:56,068 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 07:35:56,068 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:35:56,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:35:56,069 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:35:56,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:35:56,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:56,099 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 07:35:56,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 07:35:56,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:56,109 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 22 treesize of output 30 [2022-12-14 07:35:56,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:56,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 07:35:56,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:56,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:35:56,181 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:35:56,181 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 226 treesize of output 225 [2022-12-14 07:35:56,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:35:56,258 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 15 treesize of output 11 [2022-12-14 07:35:56,321 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:35:56,692 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1330#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:35:56,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:35:56,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:35:56,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11, 11] total 46 [2022-12-14 07:35:56,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568703244] [2022-12-14 07:35:56,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:35:56,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 07:35:56,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:56,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 07:35:56,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=2227, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 07:35:56,697 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:57,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:57,524 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2022-12-14 07:35:57,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 07:35:57,524 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-14 07:35:57,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:57,525 INFO L225 Difference]: With dead ends: 67 [2022-12-14 07:35:57,525 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 07:35:57,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=688, Invalid=3472, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 07:35:57,526 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:57,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 23 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:35:57,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 07:35:57,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-12-14 07:35:57,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-12-14 07:35:57,533 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 40 [2022-12-14 07:35:57,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:57,533 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-12-14 07:35:57,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:57,534 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-12-14 07:35:57,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 07:35:57,534 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:57,534 INFO L195 NwaCegarLoop]: trace histogram [27, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:57,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 07:35:57,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:35:57,735 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:57,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:57,735 INFO L85 PathProgramCache]: Analyzing trace with hash 324276492, now seen corresponding path program 6 times [2022-12-14 07:35:57,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:57,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144305549] [2022-12-14 07:35:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:57,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 07:35:58,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:58,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144305549] [2022-12-14 07:35:58,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144305549] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:35:58,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915200034] [2022-12-14 07:35:58,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:35:58,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:35:58,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:35:58,182 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:35:58,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:35:58,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:35:58,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:35:58,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 07:35:58,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:35:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 07:35:58,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:35:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 07:35:58,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915200034] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:35:58,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1962582884] [2022-12-14 07:35:58,971 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 07:35:58,972 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:35:58,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:35:58,972 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:35:58,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:35:58,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:59,002 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 07:35:59,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 07:35:59,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:59,010 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 22 treesize of output 30 [2022-12-14 07:35:59,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:59,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 07:35:59,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:59,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:59,083 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 07:35:59,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 236 treesize of output 224 [2022-12-14 07:35:59,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:35:59,142 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 15 treesize of output 11 [2022-12-14 07:35:59,201 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:35:59,622 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1901#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:35:59,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:35:59,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:35:59,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 58 [2022-12-14 07:35:59,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858935460] [2022-12-14 07:35:59,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:35:59,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-14 07:35:59,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:59,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-14 07:35:59,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1745, Invalid=2545, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 07:35:59,626 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:59,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:59,694 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2022-12-14 07:35:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 07:35:59,695 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-14 07:35:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:59,696 INFO L225 Difference]: With dead ends: 100 [2022-12-14 07:35:59,696 INFO L226 Difference]: Without dead ends: 79 [2022-12-14 07:35:59,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1745, Invalid=2545, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 07:35:59,699 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:59,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:35:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-14 07:35:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-12-14 07:35:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-12-14 07:35:59,719 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 49 [2022-12-14 07:35:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:59,719 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-12-14 07:35:59,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:59,720 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-12-14 07:35:59,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 07:35:59,722 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:59,722 INFO L195 NwaCegarLoop]: trace histogram [56, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:59,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 07:35:59,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:35:59,924 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:59,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:59,925 INFO L85 PathProgramCache]: Analyzing trace with hash -2093146303, now seen corresponding path program 7 times [2022-12-14 07:35:59,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:59,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472867709] [2022-12-14 07:35:59,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:59,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:36:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:36:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 07:36:01,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:36:01,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472867709] [2022-12-14 07:36:01,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472867709] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:36:01,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27496794] [2022-12-14 07:36:01,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:36:01,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:36:01,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:36:01,656 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:36:01,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 07:36:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:36:01,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-14 07:36:01,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:36:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 07:36:01,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:36:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 07:36:04,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27496794] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:36:04,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [548400143] [2022-12-14 07:36:04,482 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 07:36:04,483 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:36:04,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:36:04,483 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:36:04,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:36:04,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:04,513 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 07:36:04,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 07:36:04,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:04,521 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 22 treesize of output 30 [2022-12-14 07:36:04,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:04,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 07:36:04,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:04,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:36:04,590 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:36:04,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 226 treesize of output 225 [2022-12-14 07:36:04,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:36:04,647 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 15 treesize of output 11 [2022-12-14 07:36:04,695 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:36:05,173 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2804#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:36:05,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:36:05,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:36:05,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 116 [2022-12-14 07:36:05,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974813143] [2022-12-14 07:36:05,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:36:05,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-12-14 07:36:05,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:36:05,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-12-14 07:36:05,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6820, Invalid=8432, Unknown=0, NotChecked=0, Total=15252 [2022-12-14 07:36:05,184 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:36:05,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:36:05,346 INFO L93 Difference]: Finished difference Result 158 states and 217 transitions. [2022-12-14 07:36:05,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-12-14 07:36:05,347 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-12-14 07:36:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:36:05,348 INFO L225 Difference]: With dead ends: 158 [2022-12-14 07:36:05,348 INFO L226 Difference]: Without dead ends: 137 [2022-12-14 07:36:05,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6820, Invalid=8432, Unknown=0, NotChecked=0, Total=15252 [2022-12-14 07:36:05,351 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:36:05,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:36:05,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-12-14 07:36:05,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-12-14 07:36:05,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:36:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2022-12-14 07:36:05,373 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 78 [2022-12-14 07:36:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:36:05,373 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2022-12-14 07:36:05,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:36:05,374 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2022-12-14 07:36:05,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 07:36:05,375 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:36:05,375 INFO L195 NwaCegarLoop]: trace histogram [114, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:36:05,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 07:36:05,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:36:05,576 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:36:05,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:36:05,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1365947615, now seen corresponding path program 8 times [2022-12-14 07:36:05,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:36:05,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474885608] [2022-12-14 07:36:05,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:36:05,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:36:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:36:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 07:36:10,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:36:10,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474885608] [2022-12-14 07:36:10,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474885608] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:36:10,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348430070] [2022-12-14 07:36:10,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:36:10,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:36:10,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:36:10,838 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:36:10,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 07:36:11,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-14 07:36:11,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:36:11,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 07:36:11,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:36:11,249 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 15 treesize of output 11 [2022-12-14 07:36:12,990 INFO L321 Elim1Store]: treesize reduction 24, result has 82.0 percent of original size [2022-12-14 07:36:12,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 81 treesize of output 139 [2022-12-14 07:36:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2022-12-14 07:36:13,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:36:15,387 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 113 treesize of output 99 [2022-12-14 07:36:15,404 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:36:15,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 138 treesize of output 170 [2022-12-14 07:36:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2022-12-14 07:36:15,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348430070] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:36:15,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752597227] [2022-12-14 07:36:15,469 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 07:36:15,469 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:36:15,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:36:15,469 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:36:15,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:36:15,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:15,499 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 07:36:15,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 07:36:15,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:15,508 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 22 treesize of output 30 [2022-12-14 07:36:15,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:15,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 07:36:15,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:15,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:36:15,584 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:36:15,584 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 226 treesize of output 225 [2022-12-14 07:36:15,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:36:15,647 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 15 treesize of output 11 [2022-12-14 07:36:15,714 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:36:16,583 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4324#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:36:16,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:36:16,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:36:16,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 24, 19] total 154 [2022-12-14 07:36:16,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711499218] [2022-12-14 07:36:16,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:36:16,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-12-14 07:36:16,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:36:16,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-12-14 07:36:16,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7523, Invalid=18237, Unknown=0, NotChecked=0, Total=25760 [2022-12-14 07:36:16,589 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 154 states, 154 states have (on average 1.0909090909090908) internal successors, (168), 154 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:36:24,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:36:24,117 INFO L93 Difference]: Finished difference Result 183 states and 193 transitions. [2022-12-14 07:36:24,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-12-14 07:36:24,117 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 1.0909090909090908) internal successors, (168), 154 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2022-12-14 07:36:24,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:36:24,118 INFO L225 Difference]: With dead ends: 183 [2022-12-14 07:36:24,118 INFO L226 Difference]: Without dead ends: 154 [2022-12-14 07:36:24,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 362 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7113 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=8060, Invalid=25980, Unknown=0, NotChecked=0, Total=34040 [2022-12-14 07:36:24,122 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 80 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:36:24,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 53 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:36:24,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-12-14 07:36:24,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-12-14 07:36:24,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 153 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:36:24,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2022-12-14 07:36:24,147 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 136 [2022-12-14 07:36:24,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:36:24,148 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2022-12-14 07:36:24,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 1.0909090909090908) internal successors, (168), 154 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:36:24,148 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2022-12-14 07:36:24,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-14 07:36:24,150 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:36:24,150 INFO L195 NwaCegarLoop]: trace histogram [115, 16, 15, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:36:24,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 07:36:24,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 07:36:24,352 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:36:24,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:36:24,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1360355676, now seen corresponding path program 9 times [2022-12-14 07:36:24,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:36:24,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416011009] [2022-12-14 07:36:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:36:24,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:36:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:36:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6910 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 07:36:29,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:36:29,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416011009] [2022-12-14 07:36:29,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416011009] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:36:29,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400041142] [2022-12-14 07:36:29,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:36:29,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:36:29,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:36:29,482 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:36:29,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 07:36:29,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:36:29,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:36:29,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 117 conjunts are in the unsatisfiable core [2022-12-14 07:36:29,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:36:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6910 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 07:36:29,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:36:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6910 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 07:36:39,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400041142] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:36:39,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1313857235] [2022-12-14 07:36:39,854 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 07:36:39,854 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:36:39,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:36:39,854 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:36:39,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:36:39,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:39,875 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 07:36:39,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-12-14 07:36:39,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:39,896 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 07:36:39,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 07:36:39,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:39,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 07:36:39,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:39,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:39,973 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 07:36:39,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 236 treesize of output 224 [2022-12-14 07:36:40,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:36:40,026 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 15 treesize of output 11 [2022-12-14 07:36:40,077 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:36:40,813 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6135#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:36:40,813 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:36:40,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:36:40,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117, 117] total 234 [2022-12-14 07:36:40,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847581848] [2022-12-14 07:36:40,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:36:40,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 235 states [2022-12-14 07:36:40,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:36:40,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2022-12-14 07:36:40,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27529, Invalid=30793, Unknown=0, NotChecked=0, Total=58322 [2022-12-14 07:36:40,824 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 235 states, 235 states have (on average 1.0340425531914894) internal successors, (243), 234 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:36:41,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:36:41,417 INFO L93 Difference]: Finished difference Result 308 states and 426 transitions. [2022-12-14 07:36:41,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2022-12-14 07:36:41,418 INFO L78 Accepts]: Start accepts. Automaton has has 235 states, 235 states have (on average 1.0340425531914894) internal successors, (243), 234 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2022-12-14 07:36:41,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:36:41,419 INFO L225 Difference]: With dead ends: 308 [2022-12-14 07:36:41,419 INFO L226 Difference]: Without dead ends: 271 [2022-12-14 07:36:41,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2897 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=27529, Invalid=30793, Unknown=0, NotChecked=0, Total=58322 [2022-12-14 07:36:41,421 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:36:41,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:36:41,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-12-14 07:36:41,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2022-12-14 07:36:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.0074074074074073) internal successors, (272), 270 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:36:41,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2022-12-14 07:36:41,450 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 153 [2022-12-14 07:36:41,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:36:41,450 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2022-12-14 07:36:41,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 235 states, 235 states have (on average 1.0340425531914894) internal successors, (243), 234 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:36:41,451 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2022-12-14 07:36:41,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-12-14 07:36:41,453 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:36:41,453 INFO L195 NwaCegarLoop]: trace histogram [232, 16, 15, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:36:41,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 07:36:41,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 07:36:41,655 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:36:41,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:36:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash 648030297, now seen corresponding path program 10 times [2022-12-14 07:36:41,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:36:41,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807438381] [2022-12-14 07:36:41,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:36:41,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:36:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 27268 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 07:37:02,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:37:02,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807438381] [2022-12-14 07:37:02,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807438381] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:37:02,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225432424] [2022-12-14 07:37:02,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:37:02,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:37:02,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:37:02,871 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:37:02,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 07:37:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:03,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 2230 conjuncts, 234 conjunts are in the unsatisfiable core [2022-12-14 07:37:03,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 27268 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 07:37:03,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 27268 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 07:37:42,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225432424] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:42,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1095306742] [2022-12-14 07:37:42,722 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 07:37:42,722 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:37:42,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:37:42,722 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:37:42,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:37:42,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:37:42,747 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 07:37:42,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 07:37:42,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:37:42,754 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 22 treesize of output 30 [2022-12-14 07:37:42,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:37:42,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 07:37:42,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:37:42,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:37:42,816 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:37:42,816 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 226 treesize of output 225 [2022-12-14 07:37:42,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:37:42,883 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 15 treesize of output 11 [2022-12-14 07:37:42,927 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:37:44,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9318#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:37:44,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:37:44,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:37:44,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [234, 234, 234] total 468 [2022-12-14 07:37:44,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761452596] [2022-12-14 07:37:44,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:37:44,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 469 states [2022-12-14 07:37:44,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:37:44,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 469 interpolants. [2022-12-14 07:37:44,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109780, Invalid=116320, Unknown=0, NotChecked=0, Total=226100 [2022-12-14 07:37:44,056 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand has 469 states, 469 states have (on average 1.0170575692963753) internal successors, (477), 468 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:47,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:47,186 INFO L93 Difference]: Finished difference Result 542 states and 777 transitions. [2022-12-14 07:37:47,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 468 states. [2022-12-14 07:37:47,187 INFO L78 Accepts]: Start accepts. Automaton has has 469 states, 469 states have (on average 1.0170575692963753) internal successors, (477), 468 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2022-12-14 07:37:47,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:47,188 INFO L225 Difference]: With dead ends: 542 [2022-12-14 07:37:47,188 INFO L226 Difference]: Without dead ends: 505 [2022-12-14 07:37:47,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 474 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5822 ImplicationChecksByTransitivity, 52.8s TimeCoverageRelationStatistics Valid=109780, Invalid=116320, Unknown=0, NotChecked=0, Total=226100 [2022-12-14 07:37:47,197 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:47,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:37:47,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-12-14 07:37:47,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 505. [2022-12-14 07:37:47,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.003968253968254) internal successors, (506), 504 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:47,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 506 transitions. [2022-12-14 07:37:47,248 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 506 transitions. Word has length 270 [2022-12-14 07:37:47,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:47,249 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 506 transitions. [2022-12-14 07:37:47,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 469 states, 469 states have (on average 1.0170575692963753) internal successors, (477), 468 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:47,249 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 506 transitions. [2022-12-14 07:37:47,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2022-12-14 07:37:47,255 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:47,255 INFO L195 NwaCegarLoop]: trace histogram [466, 16, 15, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:37:47,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 07:37:47,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:37:47,457 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:37:47,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:47,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1601768761, now seen corresponding path program 11 times [2022-12-14 07:37:47,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:37:47,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223072128] [2022-12-14 07:37:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:47,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:37:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 109051 backedges. 0 proven. 108811 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 07:39:22,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:39:22,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223072128] [2022-12-14 07:39:22,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223072128] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:39:22,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006550623] [2022-12-14 07:39:22,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:39:22,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:22,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:39:22,800 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:39:22,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 07:39:30,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-12-14 07:39:30,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:39:30,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 107 conjunts are in the unsatisfiable core [2022-12-14 07:39:30,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:31,115 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 15 treesize of output 11 [2022-12-14 07:39:42,278 INFO L321 Elim1Store]: treesize reduction 56, result has 92.1 percent of original size [2022-12-14 07:39:42,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 51 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 151 treesize of output 719 [2022-12-14 07:39:53,419 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-14 07:39:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 109051 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 105111 trivial. 0 not checked. [2022-12-14 07:39:53,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:40:11,983 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 256 treesize of output 226 [2022-12-14 07:40:12,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:40:12,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 345 treesize of output 840 [2022-12-14 07:40:13,051 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-14 07:40:13,294 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2022-12-14 07:40:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 109051 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 108811 trivial. 0 not checked. [2022-12-14 07:40:13,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006550623] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:40:13,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1984103006] [2022-12-14 07:40:13,311 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 07:40:13,311 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:40:13,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:40:13,312 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:40:13,312 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:40:13,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:40:13,334 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 07:40:13,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 07:40:13,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:40:13,341 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 22 treesize of output 30 [2022-12-14 07:40:13,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:40:13,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 07:40:13,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:40:13,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:40:13,399 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:40:13,399 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 226 treesize of output 225 [2022-12-14 07:40:13,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:40:13,492 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 15 treesize of output 11 [2022-12-14 07:40:13,541 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:40:15,841 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14916#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:40:15,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:40:15,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:40:15,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [468, 43, 35] total 544 [2022-12-14 07:40:15,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902385059] [2022-12-14 07:40:15,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:40:15,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 544 states [2022-12-14 07:40:15,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:40:15,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 544 interpolants. [2022-12-14 07:40:15,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114469, Invalid=188581, Unknown=0, NotChecked=0, Total=303050 [2022-12-14 07:40:15,870 INFO L87 Difference]: Start difference. First operand 505 states and 506 transitions. Second operand has 544 states, 544 states have (on average 1.0275735294117647) internal successors, (559), 544 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:43:03,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:43:03,381 INFO L93 Difference]: Finished difference Result 591 states and 609 transitions. [2022-12-14 07:43:03,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 548 states. [2022-12-14 07:43:03,382 INFO L78 Accepts]: Start accepts. Automaton has has 544 states, 544 states have (on average 1.0275735294117647) internal successors, (559), 544 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 504 [2022-12-14 07:43:03,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:43:03,384 INFO L225 Difference]: With dead ends: 591 [2022-12-14 07:43:03,384 INFO L226 Difference]: Without dead ends: 538 [2022-12-14 07:43:03,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2495 GetRequests, 1429 SyntacticMatches, 0 SemanticMatches, 1066 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203029 ImplicationChecksByTransitivity, 244.4s TimeCoverageRelationStatistics Valid=332959, Invalid=806597, Unknown=0, NotChecked=0, Total=1139556 [2022-12-14 07:43:03,457 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 414 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:43:03,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 91 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 07:43:03,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-12-14 07:43:03,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2022-12-14 07:43:03,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.0037243947858474) internal successors, (539), 537 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:43:03,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 539 transitions. [2022-12-14 07:43:03,561 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 539 transitions. Word has length 504 [2022-12-14 07:43:03,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:43:03,562 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 539 transitions. [2022-12-14 07:43:03,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 544 states, 544 states have (on average 1.0275735294117647) internal successors, (559), 544 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:43:03,563 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 539 transitions. [2022-12-14 07:43:03,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2022-12-14 07:43:03,566 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:43:03,566 INFO L195 NwaCegarLoop]: trace histogram [467, 32, 31, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:43:03,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 07:43:03,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 07:43:03,768 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:43:03,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:43:03,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1419112236, now seen corresponding path program 12 times [2022-12-14 07:43:03,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:43:03,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104399819] [2022-12-14 07:43:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:43:03,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:43:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:44:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 110270 backedges. 0 proven. 109278 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-12-14 07:44:44,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:44:44,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104399819] [2022-12-14 07:44:44,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104399819] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:44:44,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348596828] [2022-12-14 07:44:44,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:44:44,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:44:44,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:44:44,537 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:44:44,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 07:44:45,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:44:45,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:44:45,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 4425 conjuncts, 469 conjunts are in the unsatisfiable core [2022-12-14 07:44:45,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:44:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 110270 backedges. 0 proven. 109278 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-12-14 07:44:45,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:47:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 110270 backedges. 0 proven. 109278 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-12-14 07:47:33,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348596828] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:47:33,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [695141533] [2022-12-14 07:47:33,151 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 07:47:33,151 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:47:33,151 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:47:33,151 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:47:33,152 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:47:33,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:33,180 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 07:47:33,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 07:47:33,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:33,187 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 22 treesize of output 30 [2022-12-14 07:47:33,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:33,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 07:47:33,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:33,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:47:33,245 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:47:33,245 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 226 treesize of output 225 [2022-12-14 07:47:33,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:47:33,304 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 15 treesize of output 11 [2022-12-14 07:47:33,348 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:47:35,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22257#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:47:35,251 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:47:35,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:47:35,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [469, 469, 469] total 938 [2022-12-14 07:47:35,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884973316] [2022-12-14 07:47:35,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:47:35,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 939 states [2022-12-14 07:47:35,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:47:35,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 939 interpolants. [2022-12-14 07:47:35,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440425, Invalid=453545, Unknown=0, NotChecked=0, Total=893970 [2022-12-14 07:47:35,356 INFO L87 Difference]: Start difference. First operand 538 states and 539 transitions. Second operand has 939 states, 939 states have (on average 1.0085197018104366) internal successors, (947), 938 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:54,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:54,921 INFO L93 Difference]: Finished difference Result 1076 states and 1546 transitions. [2022-12-14 07:47:54,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 938 states. [2022-12-14 07:47:54,922 INFO L78 Accepts]: Start accepts. Automaton has has 939 states, 939 states have (on average 1.0085197018104366) internal successors, (947), 938 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 537 [2022-12-14 07:47:54,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:54,924 INFO L225 Difference]: With dead ends: 1076 [2022-12-14 07:47:54,924 INFO L226 Difference]: Without dead ends: 1007 [2022-12-14 07:47:54,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2078 GetRequests, 1134 SyntacticMatches, 0 SemanticMatches, 944 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11697 ImplicationChecksByTransitivity, 223.5s TimeCoverageRelationStatistics Valid=440425, Invalid=453545, Unknown=0, NotChecked=0, Total=893970 [2022-12-14 07:47:54,962 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:54,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 07:47:54,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-12-14 07:47:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 1007. [2022-12-14 07:47:55,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 1.0019880715705765) internal successors, (1008), 1006 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1008 transitions. [2022-12-14 07:47:55,071 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1008 transitions. Word has length 537 [2022-12-14 07:47:55,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:55,072 INFO L495 AbstractCegarLoop]: Abstraction has 1007 states and 1008 transitions. [2022-12-14 07:47:55,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 939 states, 939 states have (on average 1.0085197018104366) internal successors, (947), 938 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1008 transitions. [2022-12-14 07:47:55,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1007 [2022-12-14 07:47:55,078 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:55,078 INFO L195 NwaCegarLoop]: trace histogram [936, 32, 31, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:47:55,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 07:47:55,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1d98622-75b2-4390-b171-eced062e7c7b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 07:47:55,280 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:47:55,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:55,281 INFO L85 PathProgramCache]: Analyzing trace with hash -338256759, now seen corresponding path program 13 times [2022-12-14 07:47:55,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:55,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466522644] [2022-12-14 07:47:55,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:55,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat