./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9 --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 2f5e2fdf471d9474a6f7c402053ba8a4914a495c159bf70e3ae967f3495d9882 --- 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-6b4ec56 [2022-11-20 20:26:39,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:26:39,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:26:40,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:26:40,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:26:40,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:26:40,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:26:40,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:26:40,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:26:40,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:26:40,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:26:40,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:26:40,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:26:40,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:26:40,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:26:40,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:26:40,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:26:40,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:26:40,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:26:40,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:26:40,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:26:40,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:26:40,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:26:40,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:26:40,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:26:40,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:26:40,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:26:40,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:26:40,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:26:40,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:26:40,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:26:40,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:26:40,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:26:40,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:26:40,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:26:40,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:26:40,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:26:40,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:26:40,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:26:40,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:26:40,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:26:40,100 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:26:40,141 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:26:40,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:26:40,142 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:26:40,142 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:26:40,143 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:26:40,144 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:26:40,144 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:26:40,144 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:26:40,144 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:26:40,145 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:26:40,146 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:26:40,146 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:26:40,146 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:26:40,147 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:26:40,147 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:26:40,147 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:26:40,147 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:26:40,148 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:26:40,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:26:40,149 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:26:40,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:26:40,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:26:40,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:26:40,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:26:40,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:26:40,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:26:40,151 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:26:40,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:26:40,151 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:26:40,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:26:40,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:26:40,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:26:40,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:26:40,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:26:40,153 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:26:40,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:26:40,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:26:40,154 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:26:40,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:26:40,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:26:40,155 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:26:40,155 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_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f5e2fdf471d9474a6f7c402053ba8a4914a495c159bf70e3ae967f3495d9882 [2022-11-20 20:26:40,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:26:40,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:26:40,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:26:40,478 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:26:40,478 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:26:40,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i [2022-11-20 20:26:43,649 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:26:43,855 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:26:43,856 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i [2022-11-20 20:26:43,867 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/data/969bf059a/a3c8b518b80c46e699f4a8b722c80f38/FLAGb24a46d28 [2022-11-20 20:26:43,882 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/data/969bf059a/a3c8b518b80c46e699f4a8b722c80f38 [2022-11-20 20:26:43,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:26:43,886 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:26:43,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:26:43,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:26:43,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:26:43,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:26:43" (1/1) ... [2022-11-20 20:26:43,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@674169ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:26:43, skipping insertion in model container [2022-11-20 20:26:43,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:26:43" (1/1) ... [2022-11-20 20:26:43,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:26:43,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:26:44,078 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_b5566018-d85b-4235-a570-277029b39db8/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i[816,829] [2022-11-20 20:26:44,094 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:26:44,102 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:26:44,112 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_b5566018-d85b-4235-a570-277029b39db8/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i[816,829] [2022-11-20 20:26:44,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:26:44,134 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:26:44,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:26:44 WrapperNode [2022-11-20 20:26:44,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:26:44,136 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:26:44,136 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:26:44,136 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:26:44,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:26:44" (1/1) ... [2022-11-20 20:26:44,150 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:26:44" (1/1) ... [2022-11-20 20:26:44,166 INFO L138 Inliner]: procedures = 16, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-11-20 20:26:44,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:26:44,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:26:44,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:26:44,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:26:44,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:26:44" (1/1) ... [2022-11-20 20:26:44,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:26:44" (1/1) ... [2022-11-20 20:26:44,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:26:44" (1/1) ... [2022-11-20 20:26:44,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:26:44" (1/1) ... [2022-11-20 20:26:44,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:26:44" (1/1) ... [2022-11-20 20:26:44,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:26:44" (1/1) ... [2022-11-20 20:26:44,189 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:26:44" (1/1) ... [2022-11-20 20:26:44,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:26:44" (1/1) ... [2022-11-20 20:26:44,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:26:44,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:26:44,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:26:44,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:26:44,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:26:44" (1/1) ... [2022-11-20 20:26:44,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:26:44,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:26:44,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:26:44,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:26:44,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:26:44,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:26:44,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 20:26:44,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 20:26:44,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:26:44,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:26:44,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 20:26:44,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 20:26:44,329 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:26:44,330 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:26:44,504 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:26:44,553 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:26:44,553 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-20 20:26:44,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:26:44 BoogieIcfgContainer [2022-11-20 20:26:44,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:26:44,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:26:44,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:26:44,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:26:44,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:26:43" (1/3) ... [2022-11-20 20:26:44,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5657de07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:26:44, skipping insertion in model container [2022-11-20 20:26:44,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:26:44" (2/3) ... [2022-11-20 20:26:44,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5657de07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:26:44, skipping insertion in model container [2022-11-20 20:26:44,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:26:44" (3/3) ... [2022-11-20 20:26:44,566 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-1.i [2022-11-20 20:26:44,585 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:26:44,586 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:26:44,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:26:44,639 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;@1483967c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:26:44,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:26:44,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 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) [2022-11-20 20:26:44,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:26:44,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:26:44,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:26:44,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:26:44,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:26:44,657 INFO L85 PathProgramCache]: Analyzing trace with hash 902400515, now seen corresponding path program 1 times [2022-11-20 20:26:44,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:26:44,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356885251] [2022-11-20 20:26:44,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:44,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:26:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:26:45,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:26:45,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356885251] [2022-11-20 20:26:45,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356885251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:26:45,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:26:45,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:26:45,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604126884] [2022-11-20 20:26:45,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:26:45,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:26:45,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:26:45,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:26:45,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:26:45,180 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 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) 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) [2022-11-20 20:26:45,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:26:45,281 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2022-11-20 20:26:45,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:26:45,296 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 [2022-11-20 20:26:45,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:26:45,304 INFO L225 Difference]: With dead ends: 21 [2022-11-20 20:26:45,304 INFO L226 Difference]: Without dead ends: 11 [2022-11-20 20:26:45,307 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 [2022-11-20 20:26:45,312 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:26:45,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:26:45,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-20 20:26:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-20 20:26:45,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) 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) [2022-11-20 20:26:45,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2022-11-20 20:26:45,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 8 [2022-11-20 20:26:45,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:26:45,356 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2022-11-20 20:26:45,357 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) [2022-11-20 20:26:45,358 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2022-11-20 20:26:45,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:26:45,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:26:45,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:26:45,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:26:45,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:26:45,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:26:45,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1054981377, now seen corresponding path program 1 times [2022-11-20 20:26:45,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:26:45,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090265232] [2022-11-20 20:26:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:45,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:26:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:26:45,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:26:45,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090265232] [2022-11-20 20:26:45,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090265232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:26:45,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55715940] [2022-11-20 20:26:45,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:45,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:26:45,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:26:45,559 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:26:45,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:26:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:45,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:26:45,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:26:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:26:45,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:26:45,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55715940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:26:45,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:26:45,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 20:26:45,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370597361] [2022-11-20 20:26:45,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:26:45,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:26:45,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:26:45,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:26:45,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:26:45,705 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-11-20 20:26:45,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:26:45,741 INFO L93 Difference]: Finished difference Result 21 states and 30 transitions. [2022-11-20 20:26:45,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:26:45,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 [2022-11-20 20:26:45,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:26:45,742 INFO L225 Difference]: With dead ends: 21 [2022-11-20 20:26:45,743 INFO L226 Difference]: Without dead ends: 14 [2022-11-20 20:26:45,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:26:45,745 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:26:45,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:26:45,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-20 20:26:45,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-20 20:26:45,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:26:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-11-20 20:26:45,750 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 9 [2022-11-20 20:26:45,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:26:45,750 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-11-20 20:26:45,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-11-20 20:26:45,751 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-11-20 20:26:45,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:26:45,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:26:45,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:26:45,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:26:45,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:26:45,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:26:45,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:26:45,968 INFO L85 PathProgramCache]: Analyzing trace with hash -978011935, now seen corresponding path program 1 times [2022-11-20 20:26:45,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:26:45,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316221736] [2022-11-20 20:26:45,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:45,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:26:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:26:46,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:26:46,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316221736] [2022-11-20 20:26:46,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316221736] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:26:46,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274221355] [2022-11-20 20:26:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:46,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:26:46,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:26:46,156 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:26:46,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:26:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:46,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:26:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:26:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:26:46,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:26:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:26:46,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274221355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:26:46,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479740771] [2022-11-20 20:26:46,447 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:26:46,449 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:26:46,453 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:26:46,461 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:26:46,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:26:46,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:46,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:46,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:46,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:46,730 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-20 20:26:46,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-20 20:26:46,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:46,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:46,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:46,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:47,021 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-20 20:26:47,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-20 20:26:47,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:47,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-20 20:26:47,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:47,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:47,527 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-20 20:26:47,529 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 378 treesize of output 377 [2022-11-20 20:26:48,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:26:48,047 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:26:48,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:26:48,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:48,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:48,214 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:26:48,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-20 20:26:48,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:48,374 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:48,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:48,416 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:26:48,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:26:48,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:48,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:48,551 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:26:48,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-20 20:26:48,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:48,748 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:48,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:48,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:48,792 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:48,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:48,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:48,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:48,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:48,891 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:26:48,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-20 20:26:48,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:48,969 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:48,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:48,996 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:26:49,249 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '223#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-20 20:26:49,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:26:49,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:26:49,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 20:26:49,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550923121] [2022-11-20 20:26:49,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:26:49,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:26:49,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:26:49,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:26:49,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:26:49,251 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:26:49,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:26:49,310 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2022-11-20 20:26:49,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:26:49,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:26:49,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:26:49,312 INFO L225 Difference]: With dead ends: 28 [2022-11-20 20:26:49,312 INFO L226 Difference]: Without dead ends: 17 [2022-11-20 20:26:49,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:26:49,313 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:26:49,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:26:49,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-20 20:26:49,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-20 20:26:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2022-11-20 20:26:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-20 20:26:49,319 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2022-11-20 20:26:49,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:26:49,320 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-20 20:26:49,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:26:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-20 20:26:49,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:26:49,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:26:49,321 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:26:49,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:26:49,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:26:49,527 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:26:49,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:26:49,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2044807905, now seen corresponding path program 2 times [2022-11-20 20:26:49,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:26:49,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033098266] [2022-11-20 20:26:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:49,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:26:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:26:49,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:26:49,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033098266] [2022-11-20 20:26:49,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033098266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:26:49,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641487803] [2022-11-20 20:26:49,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:26:49,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:26:49,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:26:49,623 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:26:49,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:26:49,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:26:49,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:26:49,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:26:49,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:26:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:26:49,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:26:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:26:49,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641487803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:26:49,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1283702027] [2022-11-20 20:26:49,741 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:26:49,741 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:26:49,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:26:49,742 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:26:49,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:26:49,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:49,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:49,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:49,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:49,909 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-20 20:26:49,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-20 20:26:49,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:49,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:49,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:49,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:49,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-11-20 20:26:50,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:50,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-20 20:26:50,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:50,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:50,189 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-20 20:26:50,190 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 388 treesize of output 376 [2022-11-20 20:26:50,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:26:50,363 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:26:50,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:26:50,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:50,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:50,455 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:26:50,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-20 20:26:50,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:50,541 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:50,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:50,570 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:26:50,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:26:50,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:50,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:50,668 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:26:50,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-20 20:26:50,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:50,742 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:50,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:50,773 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:26:50,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:26:50,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:50,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:50,852 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:26:50,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-20 20:26:50,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:50,918 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:50,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:50,936 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:26:51,235 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '395#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-20 20:26:51,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:26:51,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:26:51,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-20 20:26:51,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031659315] [2022-11-20 20:26:51,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:26:51,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:26:51,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:26:51,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:26:51,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:26:51,240 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:26:51,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:26:51,344 INFO L93 Difference]: Finished difference Result 35 states and 50 transitions. [2022-11-20 20:26:51,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:26:51,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 20:26:51,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:26:51,346 INFO L225 Difference]: With dead ends: 35 [2022-11-20 20:26:51,346 INFO L226 Difference]: Without dead ends: 26 [2022-11-20 20:26:51,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:26:51,348 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:26:51,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:26:51,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-20 20:26:51,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-20 20:26:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) [2022-11-20 20:26:51,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-20 20:26:51,364 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2022-11-20 20:26:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:26:51,364 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-20 20:26:51,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:26:51,365 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-20 20:26:51,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 20:26:51,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:26:51,366 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:26:51,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:26:51,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:26:51,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:26:51,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:26:51,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1019913981, now seen corresponding path program 3 times [2022-11-20 20:26:51,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:26:51,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825823141] [2022-11-20 20:26:51,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:51,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:26:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 20:26:51,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:26:51,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825823141] [2022-11-20 20:26:51,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825823141] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:26:51,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715760658] [2022-11-20 20:26:51,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:26:51,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:26:51,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:26:51,880 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:26:51,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:26:52,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:26:52,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:26:52,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:26:52,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:26:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 20:26:52,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:26:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 20:26:52,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715760658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:26:52,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697782700] [2022-11-20 20:26:52,123 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:26:52,123 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:26:52,124 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:26:52,124 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:26:52,124 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:26:52,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:52,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:52,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:52,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:52,272 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-20 20:26:52,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-20 20:26:52,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:52,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:52,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:52,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:52,442 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-20 20:26:52,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-20 20:26:52,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:52,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-20 20:26:52,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:52,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:52,687 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-20 20:26:52,688 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 378 treesize of output 377 [2022-11-20 20:26:52,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:26:52,964 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:26:52,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:26:53,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:53,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:53,067 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:26:53,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-20 20:26:53,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:53,152 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:53,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:53,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:53,183 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:53,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:53,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:53,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:53,235 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:26:53,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-20 20:26:53,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:53,299 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:53,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:53,352 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:26:53,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:26:53,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:53,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:53,442 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:26:53,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-20 20:26:53,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:53,559 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:53,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:53,580 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:26:53,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '659#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-20 20:26:53,959 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:26:53,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:26:53,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-20 20:26:53,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166553269] [2022-11-20 20:26:53,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:26:53,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:26:53,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:26:53,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:26:53,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:26:53,961 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2022-11-20 20:26:54,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:26:54,030 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2022-11-20 20:26:54,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:26:54,031 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 24 [2022-11-20 20:26:54,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:26:54,032 INFO L225 Difference]: With dead ends: 52 [2022-11-20 20:26:54,033 INFO L226 Difference]: Without dead ends: 32 [2022-11-20 20:26:54,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:26:54,036 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:26:54,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:26:54,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-20 20:26:54,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-20 20:26:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:26:54,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-20 20:26:54,053 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2022-11-20 20:26:54,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:26:54,053 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-20 20:26:54,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2022-11-20 20:26:54,054 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-20 20:26:54,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 20:26:54,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:26:54,055 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:26:54,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 20:26:54,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:26:54,263 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:26:54,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:26:54,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1685268547, now seen corresponding path program 4 times [2022-11-20 20:26:54,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:26:54,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650261631] [2022-11-20 20:26:54,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:54,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:26:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 20:26:54,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:26:54,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650261631] [2022-11-20 20:26:54,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650261631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:26:54,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009977755] [2022-11-20 20:26:54,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:26:54,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:26:54,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:26:54,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:26:54,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 20:26:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:54,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:26:54,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:26:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 20:26:54,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:26:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 20:26:55,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009977755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:26:55,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1574995337] [2022-11-20 20:26:55,084 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:26:55,084 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:26:55,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:26:55,085 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:26:55,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:26:55,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:55,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:55,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:55,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:55,272 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-20 20:26:55,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-20 20:26:55,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:55,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:55,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:55,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:55,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-11-20 20:26:55,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:55,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-20 20:26:55,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:55,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:55,550 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-20 20:26:55,551 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 378 treesize of output 377 [2022-11-20 20:26:55,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:26:55,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:55,798 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:55,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:55,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:55,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:55,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:55,852 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:26:55,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-20 20:26:55,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:55,903 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:55,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:55,937 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:26:55,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:26:55,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:55,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:56,031 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:26:56,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-20 20:26:56,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:56,116 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:56,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:56,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:56,148 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:56,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:56,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:56,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:56,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:56,210 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:26:56,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-20 20:26:56,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:56,271 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:56,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:56,292 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:26:56,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1017#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-20 20:26:56,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:26:56,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:26:56,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-20 20:26:56,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541374092] [2022-11-20 20:26:56,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:26:56,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 20:26:56,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:26:56,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 20:26:56,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-20 20:26:56,560 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:26:56,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:26:56,630 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-11-20 20:26:56,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 20:26:56,633 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-20 20:26:56,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:26:56,634 INFO L225 Difference]: With dead ends: 64 [2022-11-20 20:26:56,634 INFO L226 Difference]: Without dead ends: 44 [2022-11-20 20:26:56,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-20 20:26:56,637 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:26:56,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:26:56,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-20 20:26:56,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-20 20:26:56,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 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) [2022-11-20 20:26:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-11-20 20:26:56,652 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 30 [2022-11-20 20:26:56,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:26:56,652 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-11-20 20:26:56,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:26:56,652 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-11-20 20:26:56,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 20:26:56,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:26:56,654 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:26:56,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:26:56,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:26:56,860 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:26:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:26:56,860 INFO L85 PathProgramCache]: Analyzing trace with hash 136935107, now seen corresponding path program 5 times [2022-11-20 20:26:56,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:26:56,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35803037] [2022-11-20 20:26:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:56,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:26:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 20:26:57,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:26:57,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35803037] [2022-11-20 20:26:57,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35803037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:26:57,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921251683] [2022-11-20 20:26:57,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:26:57,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:26:57,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:26:57,572 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:26:57,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 20:26:57,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:26:57,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:26:57,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:26:57,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:26:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-11-20 20:26:57,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:26:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-11-20 20:26:57,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921251683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:26:57,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1837050383] [2022-11-20 20:26:57,975 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:26:57,975 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:26:57,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:26:57,976 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:26:57,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:26:57,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:57,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:58,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:58,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:58,100 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-20 20:26:58,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-20 20:26:58,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:58,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:58,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:58,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:58,259 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-20 20:26:58,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-20 20:26:58,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:58,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-20 20:26:58,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:58,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:58,448 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-20 20:26:58,449 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 378 treesize of output 377 [2022-11-20 20:26:58,647 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 16 treesize of output 12 [2022-11-20 20:26:58,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:58,678 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:58,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:58,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:26:58,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:58,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:58,742 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:26:58,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-20 20:26:58,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:58,803 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:58,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:58,840 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:26:58,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:26:58,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:58,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:58,959 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:26:58,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-20 20:26:59,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:59,035 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:59,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:59,064 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:26:59,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:26:59,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:59,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:59,155 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:26:59,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-20 20:26:59,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:26:59,211 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:26:59,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:26:59,229 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:26:59,606 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1505#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-20 20:26:59,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:26:59,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:26:59,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-20 20:26:59,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098283227] [2022-11-20 20:26:59,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:26:59,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 20:26:59,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:26:59,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 20:26:59,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 20:26:59,610 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 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) [2022-11-20 20:26:59,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:26:59,843 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2022-11-20 20:26:59,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 20:26:59,845 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 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) Word has length 42 [2022-11-20 20:26:59,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:26:59,848 INFO L225 Difference]: With dead ends: 83 [2022-11-20 20:26:59,848 INFO L226 Difference]: Without dead ends: 63 [2022-11-20 20:26:59,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 20:26:59,851 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:26:59,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:26:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-20 20:26:59,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-20 20:26:59,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 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) [2022-11-20 20:26:59,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-11-20 20:26:59,868 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 42 [2022-11-20 20:26:59,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:26:59,868 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-11-20 20:26:59,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 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) [2022-11-20 20:26:59,869 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-11-20 20:26:59,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-20 20:26:59,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:26:59,875 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:26:59,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:27:00,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:27:00,083 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:27:00,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:27:00,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1304933889, now seen corresponding path program 6 times [2022-11-20 20:27:00,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:27:00,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474663337] [2022-11-20 20:27:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:27:00,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:27:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:27:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-20 20:27:01,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:27:01,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474663337] [2022-11-20 20:27:01,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474663337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:27:01,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448852406] [2022-11-20 20:27:01,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:27:01,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:27:01,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:27:01,053 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:27:01,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:27:01,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:27:01,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:27:01,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 20:27:01,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:27:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-20 20:27:01,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:27:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-20 20:27:02,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448852406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:27:02,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [883873265] [2022-11-20 20:27:02,266 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:27:02,266 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:27:02,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:27:02,266 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:27:02,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:27:02,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:02,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:02,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:02,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:02,424 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-20 20:27:02,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-20 20:27:02,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:02,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:02,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:02,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:02,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-11-20 20:27:02,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:02,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-20 20:27:02,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:02,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:02,698 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-20 20:27:02,699 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 388 treesize of output 376 [2022-11-20 20:27:02,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:27:02,844 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:27:02,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:27:02,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:02,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:02,936 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:27:02,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-20 20:27:03,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:03,035 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:27:03,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:27:03,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:03,063 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:27:03,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:27:03,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:03,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:03,109 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:27:03,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-20 20:27:03,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:03,162 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:27:03,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:27:03,208 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:27:03,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:27:03,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:03,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:03,329 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:27:03,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-20 20:27:03,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:03,424 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:27:03,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:27:03,438 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:27:04,189 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2199#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-20 20:27:04,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:27:04,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:27:04,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-20 20:27:04,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602089024] [2022-11-20 20:27:04,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:27:04,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 20:27:04,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:27:04,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 20:27:04,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 20:27:04,194 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 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) [2022-11-20 20:27:04,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:27:04,335 INFO L93 Difference]: Finished difference Result 126 states and 158 transitions. [2022-11-20 20:27:04,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-20 20:27:04,335 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 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 61 [2022-11-20 20:27:04,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:27:04,336 INFO L225 Difference]: With dead ends: 126 [2022-11-20 20:27:04,336 INFO L226 Difference]: Without dead ends: 88 [2022-11-20 20:27:04,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 141 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 20:27:04,338 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:27:04,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:27:04,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-20 20:27:04,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-20 20:27:04,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 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) [2022-11-20 20:27:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-11-20 20:27:04,347 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 61 [2022-11-20 20:27:04,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:27:04,347 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-11-20 20:27:04,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 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) [2022-11-20 20:27:04,348 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-11-20 20:27:04,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-20 20:27:04,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:27:04,349 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:27:04,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 20:27:04,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 20:27:04,556 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:27:04,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:27:04,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1293335869, now seen corresponding path program 7 times [2022-11-20 20:27:04,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:27:04,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934228813] [2022-11-20 20:27:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:27:04,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:27:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:27:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-20 20:27:07,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:27:07,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934228813] [2022-11-20 20:27:07,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934228813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:27:07,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793278843] [2022-11-20 20:27:07,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:27:07,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:27:07,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:27:07,435 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:27:07,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 20:27:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:27:07,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-20 20:27:07,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:27:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-20 20:27:07,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:27:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-20 20:27:11,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793278843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:27:11,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1369056067] [2022-11-20 20:27:11,081 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:27:11,081 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:27:11,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:27:11,082 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:27:11,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:27:11,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:11,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:11,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:11,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:11,263 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-20 20:27:11,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-20 20:27:11,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:11,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:11,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:11,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:11,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-11-20 20:27:11,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:11,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-20 20:27:11,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:11,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:11,474 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-20 20:27:11,474 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 378 treesize of output 377 [2022-11-20 20:27:11,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:27:11,698 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:27:11,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:27:11,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:11,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:11,783 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:27:11,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-20 20:27:11,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:11,862 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:27:11,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:27:11,888 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:27:11,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:27:11,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:11,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:11,963 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:27:11,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-20 20:27:12,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:12,059 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:27:12,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:27:12,084 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:27:12,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:27:12,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:12,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:12,178 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:27:12,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-20 20:27:12,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:12,272 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:27:12,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:27:12,284 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:27:12,693 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3229#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-20 20:27:12,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:27:12,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:27:12,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-20 20:27:12,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712065123] [2022-11-20 20:27:12,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:27:12,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-20 20:27:12,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:27:12,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-20 20:27:12,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-20 20:27:12,707 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 states have internal predecessors, (111), 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) [2022-11-20 20:27:12,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:27:12,943 INFO L93 Difference]: Finished difference Result 176 states and 233 transitions. [2022-11-20 20:27:12,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-20 20:27:12,944 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 states have internal predecessors, (111), 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 86 [2022-11-20 20:27:12,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:27:12,945 INFO L225 Difference]: With dead ends: 176 [2022-11-20 20:27:12,945 INFO L226 Difference]: Without dead ends: 138 [2022-11-20 20:27:12,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-20 20:27:12,949 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:27:12,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:27:12,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-20 20:27:12,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-11-20 20:27:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 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) [2022-11-20 20:27:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-11-20 20:27:12,960 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 86 [2022-11-20 20:27:12,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:27:12,960 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-11-20 20:27:12,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 states have internal predecessors, (111), 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) [2022-11-20 20:27:12,961 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-11-20 20:27:12,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-20 20:27:12,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:27:12,963 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:27:12,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 20:27:13,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:27:13,183 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:27:13,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:27:13,184 INFO L85 PathProgramCache]: Analyzing trace with hash 597773443, now seen corresponding path program 8 times [2022-11-20 20:27:13,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:27:13,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473529328] [2022-11-20 20:27:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:27:13,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:27:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:27:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-20 20:27:20,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:27:20,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473529328] [2022-11-20 20:27:20,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473529328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:27:20,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531080616] [2022-11-20 20:27:20,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:27:20,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:27:20,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:27:20,907 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:27:20,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 20:27:23,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 20:27:23,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:27:23,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:27:23,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:27:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4961 trivial. 0 not checked. [2022-11-20 20:27:23,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:27:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4961 trivial. 0 not checked. [2022-11-20 20:27:24,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531080616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:27:24,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [829611980] [2022-11-20 20:27:24,188 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:27:24,189 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:27:24,189 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:27:24,189 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:27:24,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:27:24,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:24,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:24,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:24,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:24,296 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-20 20:27:24,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-20 20:27:24,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:24,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:24,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:24,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:24,433 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-20 20:27:24,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-20 20:27:24,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:24,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-20 20:27:24,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:24,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:24,588 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-20 20:27:24,588 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 388 treesize of output 376 [2022-11-20 20:27:24,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:27:24,697 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:27:24,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:27:24,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:24,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:24,787 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:27:24,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-20 20:27:24,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:24,841 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:27:24,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:27:24,864 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:27:24,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:27:24,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:24,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:24,957 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:27:24,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-20 20:27:25,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:25,077 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:27:25,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:27:25,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:25,101 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:27:25,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:27:25,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:25,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:25,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:25,143 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:27:25,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-20 20:27:25,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:25,180 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:27:25,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:27:25,191 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:27:25,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4781#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-20 20:27:25,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:27:25,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:27:25,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-20 20:27:25,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952559223] [2022-11-20 20:27:25,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:27:25,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-20 20:27:25,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:27:25,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-20 20:27:25,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-20 20:27:25,809 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 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) [2022-11-20 20:27:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:27:26,231 INFO L93 Difference]: Finished difference Result 213 states and 257 transitions. [2022-11-20 20:27:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-20 20:27:26,231 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 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 [2022-11-20 20:27:26,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:27:26,235 INFO L225 Difference]: With dead ends: 213 [2022-11-20 20:27:26,235 INFO L226 Difference]: Without dead ends: 175 [2022-11-20 20:27:26,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-20 20:27:26,242 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:27:26,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:27:26,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-20 20:27:26,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-11-20 20:27:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.028735632183908) internal successors, (179), 174 states have internal predecessors, (179), 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) [2022-11-20 20:27:26,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 179 transitions. [2022-11-20 20:27:26,272 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 179 transitions. Word has length 136 [2022-11-20 20:27:26,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:27:26,273 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 179 transitions. [2022-11-20 20:27:26,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 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) [2022-11-20 20:27:26,273 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 179 transitions. [2022-11-20 20:27:26,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-20 20:27:26,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:27:26,283 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:27:26,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 20:27:26,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 20:27:26,504 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:27:26,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:27:26,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1338517759, now seen corresponding path program 9 times [2022-11-20 20:27:26,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:27:26,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137367300] [2022-11-20 20:27:26,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:27:26,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:27:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:27:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-20 20:27:35,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:27:35,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137367300] [2022-11-20 20:27:35,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137367300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:27:35,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112556933] [2022-11-20 20:27:35,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:27:35,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:27:35,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:27:35,291 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:27:35,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 20:27:35,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:27:35,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:27:35,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-20 20:27:35,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:27:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-20 20:27:36,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:27:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-20 20:27:48,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112556933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:27:48,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2128255251] [2022-11-20 20:27:48,819 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:27:48,819 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:27:48,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:27:48,820 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:27:48,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:27:48,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:48,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:48,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:48,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:48,959 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-20 20:27:48,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-20 20:27:48,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:48,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:48,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:48,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:49,128 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-20 20:27:49,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-20 20:27:49,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:49,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-20 20:27:49,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:49,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:27:49,311 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-20 20:27:49,312 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 388 treesize of output 376 [2022-11-20 20:27:49,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:27:49,437 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:27:49,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:27:49,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:49,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:49,541 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:27:49,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-20 20:27:49,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:49,633 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:27:49,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:27:49,663 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:27:49,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:27:49,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:49,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:49,737 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:27:49,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-20 20:27:49,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:49,842 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:27:49,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:27:49,867 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:27:49,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:27:49,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:49,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:49,954 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:27:49,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-20 20:27:50,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:27:50,039 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:27:50,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:27:50,055 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:27:50,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6783#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-20 20:27:50,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:27:50,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:27:50,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-20 20:27:50,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351803552] [2022-11-20 20:27:50,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:27:50,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-20 20:27:50,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:27:50,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-20 20:27:50,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-20 20:27:50,667 INFO L87 Difference]: Start difference. First operand 175 states and 179 transitions. Second operand has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 202 states have internal predecessors, (213), 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) [2022-11-20 20:27:51,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:27:51,299 INFO L93 Difference]: Finished difference Result 350 states and 458 transitions. [2022-11-20 20:27:51,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-20 20:27:51,302 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 202 states have internal predecessors, (213), 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 173 [2022-11-20 20:27:51,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:27:51,304 INFO L225 Difference]: With dead ends: 350 [2022-11-20 20:27:51,304 INFO L226 Difference]: Without dead ends: 276 [2022-11-20 20:27:51,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-20 20:27:51,308 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:27:51,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:27:51,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-20 20:27:51,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-11-20 20:27:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.018181818181818) internal successors, (280), 275 states have internal predecessors, (280), 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) [2022-11-20 20:27:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 280 transitions. [2022-11-20 20:27:51,323 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 280 transitions. Word has length 173 [2022-11-20 20:27:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:27:51,324 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 280 transitions. [2022-11-20 20:27:51,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 202 states have internal predecessors, (213), 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) [2022-11-20 20:27:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 280 transitions. [2022-11-20 20:27:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-11-20 20:27:51,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:27:51,329 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:27:51,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 20:27:51,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:27:51,536 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:27:51,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:27:51,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1563177405, now seen corresponding path program 10 times [2022-11-20 20:27:51,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:27:51,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194320722] [2022-11-20 20:27:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:27:51,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:27:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:28:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-20 20:28:19,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:28:19,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194320722] [2022-11-20 20:28:19,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194320722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:28:19,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549272930] [2022-11-20 20:28:19,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:28:19,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:28:19,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:28:19,811 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:28:19,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 20:28:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:28:20,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 2363 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-20 20:28:20,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:28:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-20 20:28:21,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:29:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-20 20:29:13,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549272930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:29:13,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1323791831] [2022-11-20 20:29:13,166 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:29:13,166 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:29:13,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:29:13,166 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:29:13,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:29:13,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:29:13,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:29:13,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:29:13,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:29:13,269 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-20 20:29:13,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-20 20:29:13,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:29:13,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:29:13,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:29:13,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:29:13,399 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-20 20:29:13,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-20 20:29:13,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:29:13,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-20 20:29:13,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:29:13,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:29:13,531 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-20 20:29:13,532 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 378 treesize of output 377 [2022-11-20 20:29:13,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:29:13,680 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:29:13,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:29:13,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:29:13,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:29:13,760 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:29:13,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-20 20:29:13,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:29:13,819 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:29:13,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:29:13,841 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:29:13,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:29:13,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:29:13,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:29:13,934 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:29:13,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-20 20:29:13,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:29:13,985 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:29:13,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:29:14,010 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:29:14,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:29:14,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:29:14,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:29:14,106 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:29:14,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-20 20:29:14,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:29:14,161 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:29:14,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:29:14,175 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:29:15,151 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10069#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-20 20:29:15,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:29:15,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:29:15,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-20 20:29:15,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011850874] [2022-11-20 20:29:15,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:29:15,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-20 20:29:15,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:29:15,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-20 20:29:15,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-20 20:29:15,175 INFO L87 Difference]: Start difference. First operand 276 states and 280 transitions. Second operand has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 404 states have internal predecessors, (415), 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) [2022-11-20 20:29:18,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:29:18,235 INFO L93 Difference]: Finished difference Result 552 states and 761 transitions. [2022-11-20 20:29:18,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-20 20:29:18,236 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 404 states have internal predecessors, (415), 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 274 [2022-11-20 20:29:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:29:18,239 INFO L225 Difference]: With dead ends: 552 [2022-11-20 20:29:18,239 INFO L226 Difference]: Without dead ends: 478 [2022-11-20 20:29:18,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 69.9s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-20 20:29:18,247 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:29:18,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:29:18,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-11-20 20:29:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2022-11-20 20:29:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.0104821802935011) internal successors, (482), 477 states have internal predecessors, (482), 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) [2022-11-20 20:29:18,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 482 transitions. [2022-11-20 20:29:18,328 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 482 transitions. Word has length 274 [2022-11-20 20:29:18,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:29:18,329 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 482 transitions. [2022-11-20 20:29:18,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 404 states have internal predecessors, (415), 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) [2022-11-20 20:29:18,330 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 482 transitions. [2022-11-20 20:29:18,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2022-11-20 20:29:18,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:29:18,340 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:29:18,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 20:29:18,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 20:29:18,550 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:29:18,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:29:18,550 INFO L85 PathProgramCache]: Analyzing trace with hash -2069379837, now seen corresponding path program 11 times [2022-11-20 20:29:18,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:29:18,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909744808] [2022-11-20 20:29:18,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:29:18,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:29:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:31:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 81762 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-20 20:31:09,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:31:09,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909744808] [2022-11-20 20:31:09,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909744808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:31:09,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756678005] [2022-11-20 20:31:09,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:31:09,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:31:09,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:31:09,110 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:31:09,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 20:31:54,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-20 20:31:54,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:31:54,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 20:31:54,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:31:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 81762 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81509 trivial. 0 not checked. [2022-11-20 20:31:59,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:32:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 81762 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81509 trivial. 0 not checked. [2022-11-20 20:32:04,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756678005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:32:04,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [567853426] [2022-11-20 20:32:04,030 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:32:04,030 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:32:04,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:32:04,031 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:32:04,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:32:04,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:32:04,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:32:04,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:32:04,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:32:04,163 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-20 20:32:04,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-20 20:32:04,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:32:04,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:32:04,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:32:04,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:32:04,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-11-20 20:32:04,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:32:04,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-20 20:32:04,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:32:04,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:32:04,310 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-20 20:32:04,311 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 388 treesize of output 376 [2022-11-20 20:32:04,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:32:04,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:32:04,407 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:32:04,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:32:04,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:32:04,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:32:04,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:32:04,440 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:32:04,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-20 20:32:04,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:32:04,476 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:32:04,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:32:04,497 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:32:04,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:32:04,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:32:04,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:32:04,560 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:32:04,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-20 20:32:04,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:32:04,616 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:32:04,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:32:04,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:32:04,646 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:32:04,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:32:04,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:32:04,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:32:04,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:32:04,682 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:32:04,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-20 20:32:04,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:32:04,717 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:32:04,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:32:04,730 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:32:06,831 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15421#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-20 20:32:06,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:32:06,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:32:06,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 25, 25] total 451 [2022-11-20 20:32:06,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757030275] [2022-11-20 20:32:06,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:32:06,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 451 states [2022-11-20 20:32:06,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:32:06,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 451 interpolants. [2022-11-20 20:32:06,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82957, Invalid=124523, Unknown=0, NotChecked=0, Total=207480 [2022-11-20 20:32:06,855 INFO L87 Difference]: Start difference. First operand 478 states and 482 transitions. Second operand has 451 states, 451 states have (on average 1.0310421286031042) internal successors, (465), 451 states have internal predecessors, (465), 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) [2022-11-20 20:32:10,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:32:10,790 INFO L93 Difference]: Finished difference Result 625 states and 705 transitions. [2022-11-20 20:32:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 451 states. [2022-11-20 20:32:10,791 INFO L78 Accepts]: Start accepts. Automaton has has 451 states, 451 states have (on average 1.0310421286031042) internal successors, (465), 451 states have internal predecessors, (465), 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 476 [2022-11-20 20:32:10,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:32:10,795 INFO L225 Difference]: With dead ends: 625 [2022-11-20 20:32:10,795 INFO L226 Difference]: Without dead ends: 551 [2022-11-20 20:32:10,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1830 GetRequests, 1376 SyntacticMatches, 0 SemanticMatches, 454 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20837 ImplicationChecksByTransitivity, 80.8s TimeCoverageRelationStatistics Valid=82957, Invalid=124523, Unknown=0, NotChecked=0, Total=207480 [2022-11-20 20:32:10,806 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:32:10,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 20:32:10,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-11-20 20:32:10,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2022-11-20 20:32:10,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 1.009090909090909) internal successors, (555), 550 states have internal predecessors, (555), 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) [2022-11-20 20:32:10,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 555 transitions. [2022-11-20 20:32:10,830 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 555 transitions. Word has length 476 [2022-11-20 20:32:10,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:32:10,830 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 555 transitions. [2022-11-20 20:32:10,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 451 states, 451 states have (on average 1.0310421286031042) internal successors, (465), 451 states have internal predecessors, (465), 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) [2022-11-20 20:32:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 555 transitions. [2022-11-20 20:32:10,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2022-11-20 20:32:10,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:32:10,845 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:32:10,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 20:32:11,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 20:32:11,059 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:32:11,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:32:11,059 INFO L85 PathProgramCache]: Analyzing trace with hash 290057217, now seen corresponding path program 12 times [2022-11-20 20:32:11,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:32:11,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171504135] [2022-11-20 20:32:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:32:11,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:32:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:34:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 84649 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-11-20 20:34:09,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:34:09,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171504135] [2022-11-20 20:34:09,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171504135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:34:09,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114905017] [2022-11-20 20:34:09,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:34:09,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:34:09,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:34:09,326 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:34:09,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 20:34:10,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:34:10,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:34:10,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 4694 conjuncts, 405 conjunts are in the unsatisfiable core [2022-11-20 20:34:10,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:34:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 84649 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-11-20 20:34:11,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:37:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 84649 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-11-20 20:37:42,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114905017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:37:42,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1577133050] [2022-11-20 20:37:42,571 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:37:42,571 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:37:42,571 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:37:42,572 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:37:42,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:37:42,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:37:42,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:37:42,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:37:42,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:37:42,822 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-20 20:37:42,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-20 20:37:42,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:37:42,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:37:42,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:37:42,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:37:42,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-11-20 20:37:42,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:37:42,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-20 20:37:42,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:37:42,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:37:42,958 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-20 20:37:42,958 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 388 treesize of output 376 [2022-11-20 20:37:43,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 20:37:43,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:37:43,053 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:37:43,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:37:43,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:37:43,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:37:43,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:37:43,097 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-20 20:37:43,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-20 20:37:43,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:37:43,132 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:37:43,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:37:43,155 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:37:43,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:37:43,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:37:43,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:37:43,226 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-20 20:37:43,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-20 20:37:43,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:37:43,269 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:37:43,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:37:43,293 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:37:43,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:37:43,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:37:43,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:37:43,366 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-20 20:37:43,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-20 20:37:43,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:37:43,431 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:37:43,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 20:37:43,447 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:37:45,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21863#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-20 20:37:45,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:37:45,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:37:45,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 405, 405] total 810 [2022-11-20 20:37:45,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045290512] [2022-11-20 20:37:45,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:37:45,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-11-20 20:37:45,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:37:45,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-11-20 20:37:45,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-11-20 20:37:45,615 INFO L87 Difference]: Start difference. First operand 551 states and 555 transitions. Second operand has 811 states, 811 states have (on average 1.0123304562268804) internal successors, (821), 810 states have internal predecessors, (821), 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) [2022-11-20 20:38:04,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:38:04,489 INFO L93 Difference]: Finished difference Result 1102 states and 1514 transitions. [2022-11-20 20:38:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-11-20 20:38:04,491 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0123304562268804) internal successors, (821), 810 states have internal predecessors, (821), 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 549 [2022-11-20 20:38:04,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:38:04,495 INFO L225 Difference]: With dead ends: 1102 [2022-11-20 20:38:04,495 INFO L226 Difference]: Without dead ends: 956 [2022-11-20 20:38:04,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2050 GetRequests, 1236 SyntacticMatches, 0 SemanticMatches, 814 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7672 ImplicationChecksByTransitivity, 283.1s TimeCoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-11-20 20:38:04,530 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:38:04,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 20:38:04,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-11-20 20:38:04,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 956. [2022-11-20 20:38:04,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 1.0052356020942408) internal successors, (960), 955 states have internal predecessors, (960), 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) [2022-11-20 20:38:04,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 960 transitions. [2022-11-20 20:38:04,570 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 960 transitions. Word has length 549 [2022-11-20 20:38:04,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:38:04,571 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 960 transitions. [2022-11-20 20:38:04,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0123304562268804) internal successors, (821), 810 states have internal predecessors, (821), 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) [2022-11-20 20:38:04,572 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 960 transitions. [2022-11-20 20:38:04,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2022-11-20 20:38:04,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:38:04,580 INFO L195 NwaCegarLoop]: trace histogram [808, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:38:04,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 20:38:04,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5566018-d85b-4235-a570-277029b39db8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:38:04,787 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:38:04,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:38:04,787 INFO L85 PathProgramCache]: Analyzing trace with hash -743735485, now seen corresponding path program 13 times [2022-11-20 20:38:04,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:38:04,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862128042] [2022-11-20 20:38:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:04,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:38:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat