./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 46bbe683d8965e9a855fbd780578b958a816bbdd25bc1fa0d6151e1b826f8669 --- 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-4e7fbc6 [2022-11-23 15:18:55,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:18:55,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:18:55,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:18:55,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:18:55,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:18:55,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:18:55,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:18:55,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:18:55,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:18:55,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:18:55,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:18:55,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:18:55,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:18:55,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:18:55,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:18:55,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:18:55,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:18:55,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:18:55,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:18:55,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:18:55,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:18:55,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:18:55,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:18:55,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:18:55,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:18:55,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:18:55,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:18:55,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:18:55,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:18:55,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:18:55,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:18:55,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:18:55,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:18:55,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:18:55,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:18:55,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:18:55,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:18:55,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:18:55,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:18:55,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:18:55,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 15:18:55,304 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:18:55,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:18:55,305 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:18:55,305 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:18:55,306 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:18:55,307 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:18:55,307 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:18:55,307 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:18:55,307 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:18:55,307 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:18:55,308 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:18:55,309 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:18:55,309 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:18:55,309 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:18:55,309 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:18:55,309 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:18:55,309 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:18:55,310 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:18:55,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 15:18:55,310 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 15:18:55,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:18:55,311 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:18:55,311 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 15:18:55,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:18:55,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:18:55,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:18:55,312 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 15:18:55,312 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 15:18:55,312 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 15:18:55,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:18:55,313 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 15:18:55,313 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:18:55,313 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:18:55,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:18:55,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:18:55,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:18:55,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:18:55,315 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:18:55,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:18:55,315 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:18:55,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:18:55,315 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:18:55,315 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_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46bbe683d8965e9a855fbd780578b958a816bbdd25bc1fa0d6151e1b826f8669 [2022-11-23 15:18:55,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:18:55,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:18:55,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:18:55,620 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:18:55,621 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:18:55,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2022-11-23 15:18:58,694 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:18:59,039 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:18:59,040 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2022-11-23 15:18:59,051 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/data/ebe8e5a4e/12b3d62c5cfe42a3a7d4d24a4fe682b9/FLAGa6b7875a1 [2022-11-23 15:18:59,068 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/data/ebe8e5a4e/12b3d62c5cfe42a3a7d4d24a4fe682b9 [2022-11-23 15:18:59,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:18:59,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:18:59,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:18:59,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:18:59,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:18:59,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:18:59" (1/1) ... [2022-11-23 15:18:59,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66581c00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:59, skipping insertion in model container [2022-11-23 15:18:59,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:18:59" (1/1) ... [2022-11-23 15:18:59,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:18:59,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:18:59,496 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_31e36daf-f299-43c9-bd19-ee85b888a2cf/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2022-11-23 15:18:59,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:18:59,520 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:18:59,557 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_31e36daf-f299-43c9-bd19-ee85b888a2cf/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2022-11-23 15:18:59,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:18:59,583 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:18:59,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:59 WrapperNode [2022-11-23 15:18:59,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:18:59,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:18:59,585 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:18:59,585 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:18:59,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:59" (1/1) ... [2022-11-23 15:18:59,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:59" (1/1) ... [2022-11-23 15:18:59,628 INFO L138 Inliner]: procedures = 127, calls = 38, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 117 [2022-11-23 15:18:59,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:18:59,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:18:59,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:18:59,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:18:59,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:59" (1/1) ... [2022-11-23 15:18:59,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:59" (1/1) ... [2022-11-23 15:18:59,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:59" (1/1) ... [2022-11-23 15:18:59,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:59" (1/1) ... [2022-11-23 15:18:59,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:59" (1/1) ... [2022-11-23 15:18:59,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:59" (1/1) ... [2022-11-23 15:18:59,658 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:59" (1/1) ... [2022-11-23 15:18:59,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:59" (1/1) ... [2022-11-23 15:18:59,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:18:59,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:18:59,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:18:59,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:18:59,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:59" (1/1) ... [2022-11-23 15:18:59,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:18:59,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:18:59,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:18:59,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:18:59,735 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-11-23 15:18:59,736 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-11-23 15:18:59,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:18:59,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:18:59,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:18:59,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:18:59,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:18:59,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:18:59,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:18:59,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:18:59,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 15:18:59,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:18:59,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:18:59,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:18:59,870 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:18:59,872 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:18:59,937 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-11-23 15:19:00,384 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:19:00,467 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:19:00,467 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 15:19:00,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:19:00 BoogieIcfgContainer [2022-11-23 15:19:00,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:19:00,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:19:00,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:19:00,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:19:00,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:18:59" (1/3) ... [2022-11-23 15:19:00,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc5cdfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:19:00, skipping insertion in model container [2022-11-23 15:19:00,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:59" (2/3) ... [2022-11-23 15:19:00,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc5cdfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:19:00, skipping insertion in model container [2022-11-23 15:19:00,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:19:00" (3/3) ... [2022-11-23 15:19:00,479 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2022-11-23 15:19:00,501 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:19:00,501 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2022-11-23 15:19:00,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:19:00,568 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@69c6c7d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:19:00,569 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-11-23 15:19:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 36 states have (on average 2.388888888888889) internal successors, (86), 78 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:00,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 15:19:00,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:00,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 15:19:00,591 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:00,600 INFO L85 PathProgramCache]: Analyzing trace with hash 6153029, now seen corresponding path program 1 times [2022-11-23 15:19:00,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:00,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589915849] [2022-11-23 15:19:00,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:00,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:19:00,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:00,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589915849] [2022-11-23 15:19:00,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589915849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:00,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:00,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:19:00,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597310367] [2022-11-23 15:19:00,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:01,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:01,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:01,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:01,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:19:01,036 INFO L87 Difference]: Start difference. First operand has 80 states, 36 states have (on average 2.388888888888889) internal successors, (86), 78 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:01,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:01,291 INFO L93 Difference]: Finished difference Result 135 states and 148 transitions. [2022-11-23 15:19:01,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:01,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 15:19:01,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:01,307 INFO L225 Difference]: With dead ends: 135 [2022-11-23 15:19:01,308 INFO L226 Difference]: Without dead ends: 129 [2022-11-23 15:19:01,311 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 [2022-11-23 15:19:01,317 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 72 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:01,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 122 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:19:01,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-23 15:19:01,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 72. [2022-11-23 15:19:01,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 34 states have (on average 2.264705882352941) internal successors, (77), 71 states have internal predecessors, (77), 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) [2022-11-23 15:19:01,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2022-11-23 15:19:01,351 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 4 [2022-11-23 15:19:01,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:01,351 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2022-11-23 15:19:01,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2022-11-23 15:19:01,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 15:19:01,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:01,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 15:19:01,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:19:01,353 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:01,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash 6153030, now seen corresponding path program 1 times [2022-11-23 15:19:01,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:01,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113991974] [2022-11-23 15:19:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:01,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:19:01,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:01,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113991974] [2022-11-23 15:19:01,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113991974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:01,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:01,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:19:01,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772451578] [2022-11-23 15:19:01,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:01,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:01,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:01,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:01,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:19:01,530 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:01,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:01,684 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2022-11-23 15:19:01,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:01,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 15:19:01,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:01,695 INFO L225 Difference]: With dead ends: 128 [2022-11-23 15:19:01,696 INFO L226 Difference]: Without dead ends: 128 [2022-11-23 15:19:01,699 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 [2022-11-23 15:19:01,701 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 70 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:01,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 117 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:01,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-23 15:19:01,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 69. [2022-11-23 15:19:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 34 states have (on average 2.176470588235294) internal successors, (74), 68 states have internal predecessors, (74), 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) [2022-11-23 15:19:01,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2022-11-23 15:19:01,708 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 4 [2022-11-23 15:19:01,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:01,708 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2022-11-23 15:19:01,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:01,709 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2022-11-23 15:19:01,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 15:19:01,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:01,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 15:19:01,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:19:01,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:01,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:01,713 INFO L85 PathProgramCache]: Analyzing trace with hash 6311657, now seen corresponding path program 1 times [2022-11-23 15:19:01,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:01,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713152906] [2022-11-23 15:19:01,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:01,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:19:01,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:01,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713152906] [2022-11-23 15:19:01,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713152906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:01,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:01,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:19:01,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573738301] [2022-11-23 15:19:01,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:01,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:01,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:01,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:01,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:19:01,815 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:01,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:01,854 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2022-11-23 15:19:01,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:01,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 15:19:01,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:01,856 INFO L225 Difference]: With dead ends: 79 [2022-11-23 15:19:01,856 INFO L226 Difference]: Without dead ends: 79 [2022-11-23 15:19:01,860 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 [2022-11-23 15:19:01,864 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 10 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:01,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 120 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:19:01,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-23 15:19:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2022-11-23 15:19:01,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 35 states have (on average 2.142857142857143) internal successors, (75), 69 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2022-11-23 15:19:01,884 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 4 [2022-11-23 15:19:01,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:01,884 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2022-11-23 15:19:01,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:01,884 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2022-11-23 15:19:01,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:19:01,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:01,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:01,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:19:01,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:01,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:01,886 INFO L85 PathProgramCache]: Analyzing trace with hash 209673289, now seen corresponding path program 1 times [2022-11-23 15:19:01,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:01,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812943872] [2022-11-23 15:19:01,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:01,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:19:01,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:01,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812943872] [2022-11-23 15:19:01,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812943872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:01,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:01,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:19:01,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038379651] [2022-11-23 15:19:01,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:01,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:01,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:01,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:01,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:19:01,997 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. 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) [2022-11-23 15:19:02,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:02,044 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2022-11-23 15:19:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:02,045 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 [2022-11-23 15:19:02,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:02,046 INFO L225 Difference]: With dead ends: 76 [2022-11-23 15:19:02,046 INFO L226 Difference]: Without dead ends: 76 [2022-11-23 15:19:02,047 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 [2022-11-23 15:19:02,053 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 1 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:02,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 115 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:19:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-23 15:19:02,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-11-23 15:19:02,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 40 states have (on average 2.0) internal successors, (80), 74 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:02,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2022-11-23 15:19:02,059 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 8 [2022-11-23 15:19:02,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:02,059 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2022-11-23 15:19:02,060 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) [2022-11-23 15:19:02,060 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2022-11-23 15:19:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:19:02,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:02,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:02,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:19:02,061 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:02,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:02,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1499445486, now seen corresponding path program 1 times [2022-11-23 15:19:02,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:02,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847836059] [2022-11-23 15:19:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:02,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:19:02,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:02,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847836059] [2022-11-23 15:19:02,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847836059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:02,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504471126] [2022-11-23 15:19:02,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:02,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:02,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:02,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:02,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:19:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:02,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:19:02,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:19:02,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:19:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:19:02,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504471126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:19:02,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [25283096] [2022-11-23 15:19:02,509 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 15:19:02,510 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:19:02,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:19:02,535 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:19:02,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:19:02,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:02,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:02,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 15:19:02,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:02,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:02,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:02,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:02,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:02,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-23 15:19:02,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 15:19:02,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 15:19:02,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:02,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 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 [2022-11-23 15:19:02,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:19:02,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:02,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:02,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-23 15:19:02,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:19:02,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 15:19:02,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:02,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:02,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-23 15:19:02,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 15:19:03,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-23 15:19:03,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2022-11-23 15:19:03,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2022-11-23 15:19:03,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-23 15:19:03,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-23 15:19:03,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-23 15:19:03,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-23 15:19:03,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:03,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:03,587 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-23 15:19:03,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 395 treesize of output 376 [2022-11-23 15:19:03,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:03,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:03,644 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-23 15:19:03,645 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 4 case distinctions, treesize of input 389 treesize of output 388 [2022-11-23 15:19:03,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:03,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:03,720 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-23 15:19:03,721 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 4 case distinctions, treesize of input 389 treesize of output 388 [2022-11-23 15:19:03,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:03,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-23 15:19:04,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:04,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2022-11-23 15:19:04,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:04,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2022-11-23 15:19:04,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:04,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:04,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:04,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-23 15:19:04,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:04,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:04,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:04,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:04,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-23 15:19:04,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:04,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-23 15:19:04,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:04,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-23 15:19:04,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:04,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:04,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:04,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:04,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:04,385 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-23 15:19:04,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 395 treesize of output 376 [2022-11-23 15:19:04,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:04,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:04,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:04,432 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-23 15:19:04,433 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 4 case distinctions, treesize of input 389 treesize of output 388 [2022-11-23 15:19:04,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:04,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:04,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:04,482 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-23 15:19:04,482 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 4 case distinctions, treesize of input 389 treesize of output 388 [2022-11-23 15:19:04,952 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-11-23 15:19:04,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 313 treesize of output 320 [2022-11-23 15:19:05,425 INFO L321 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2022-11-23 15:19:05,426 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 392 treesize of output 389 [2022-11-23 15:19:05,486 INFO L321 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2022-11-23 15:19:05,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 396 treesize of output 387 [2022-11-23 15:19:05,535 INFO L321 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2022-11-23 15:19:05,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 396 treesize of output 387 [2022-11-23 15:19:05,639 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:19:09,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [25283096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:09,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:19:09,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2022-11-23 15:19:09,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767333881] [2022-11-23 15:19:09,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:09,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:19:09,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:09,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:19:09,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:19:09,168 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:10,269 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2022-11-23 15:19:10,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:19:10,270 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 15:19:10,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:10,270 INFO L225 Difference]: With dead ends: 86 [2022-11-23 15:19:10,270 INFO L226 Difference]: Without dead ends: 86 [2022-11-23 15:19:10,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:19:10,271 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 12 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:10,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 109 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:19:10,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-23 15:19:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2022-11-23 15:19:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 47 states have (on average 1.872340425531915) internal successors, (88), 81 states have internal predecessors, (88), 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) [2022-11-23 15:19:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2022-11-23 15:19:10,277 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 11 [2022-11-23 15:19:10,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:10,278 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2022-11-23 15:19:10,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:10,278 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2022-11-23 15:19:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 15:19:10,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:10,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 15:19:10,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:19:10,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:10,485 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:10,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:10,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1543488562, now seen corresponding path program 1 times [2022-11-23 15:19:10,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:10,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98814222] [2022-11-23 15:19:10,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:10,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:19:10,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:10,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98814222] [2022-11-23 15:19:10,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98814222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:10,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157208030] [2022-11-23 15:19:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:10,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:10,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:10,650 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:10,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:19:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:10,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:19:10,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:10,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:19:10,795 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:19:10,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-23 15:19:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:19:10,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:19:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:19:10,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157208030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:19:10,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1066611655] [2022-11-23 15:19:10,924 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:19:10,924 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:19:10,924 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:19:10,924 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:19:10,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:19:10,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:10,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:10,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 15:19:10,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:10,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:10,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:10,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:10,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:10,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-23 15:19:11,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 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 [2022-11-23 15:19:11,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 15:19:11,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 15:19:11,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-23 15:19:11,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:19:11,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:19:11,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 15:19:11,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 15:19:11,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-23 15:19:11,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-23 15:19:11,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 15:19:11,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 15:19:11,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-23 15:19:11,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 15:19:11,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 15:19:11,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-23 15:19:11,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:11,510 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-23 15:19:11,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 387 treesize of output 368 [2022-11-23 15:19:11,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:11,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:11,550 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:19:11,550 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 4 case distinctions, treesize of input 381 treesize of output 380 [2022-11-23 15:19:11,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:11,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:11,596 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:19:11,597 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 4 case distinctions, treesize of input 381 treesize of output 380 [2022-11-23 15:19:11,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-23 15:19:11,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 15:19:11,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 15:19:11,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-23 15:19:11,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-23 15:19:11,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 15:19:11,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 15:19:11,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:11,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:11,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:12,007 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:19:12,007 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 4 case distinctions, treesize of input 381 treesize of output 380 [2022-11-23 15:19:12,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:12,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:12,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:12,039 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-23 15:19:12,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 387 treesize of output 368 [2022-11-23 15:19:12,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:12,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:12,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:12,074 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:19:12,075 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 4 case distinctions, treesize of input 381 treesize of output 380 [2022-11-23 15:19:12,422 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-11-23 15:19:12,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 310 treesize of output 317 [2022-11-23 15:19:12,763 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-11-23 15:19:12,764 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 392 treesize of output 389 [2022-11-23 15:19:12,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:19:12,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 396 treesize of output 387 [2022-11-23 15:19:12,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:19:12,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 396 treesize of output 387 [2022-11-23 15:19:12,875 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:19:16,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1066611655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:16,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:19:16,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 3, 4] total 13 [2022-11-23 15:19:16,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223021026] [2022-11-23 15:19:16,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:16,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:19:16,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:16,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:19:16,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:19:16,641 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-11-23 15:19:17,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:17,934 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-11-23 15:19:17,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 15:19:17,935 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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 [2022-11-23 15:19:17,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:17,935 INFO L225 Difference]: With dead ends: 84 [2022-11-23 15:19:17,935 INFO L226 Difference]: Without dead ends: 84 [2022-11-23 15:19:17,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:19:17,936 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:17,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 119 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 15:19:17,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-23 15:19:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-11-23 15:19:17,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 82 states have internal predecessors, (89), 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) [2022-11-23 15:19:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2022-11-23 15:19:17,941 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 15 [2022-11-23 15:19:17,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:17,942 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2022-11-23 15:19:17,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-11-23 15:19:17,942 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2022-11-23 15:19:17,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 15:19:17,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:17,943 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:17,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:19:18,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:18,154 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:18,154 INFO L85 PathProgramCache]: Analyzing trace with hash -288796838, now seen corresponding path program 1 times [2022-11-23 15:19:18,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:18,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081558671] [2022-11-23 15:19:18,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:18,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:19:18,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:18,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081558671] [2022-11-23 15:19:18,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081558671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:18,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:18,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:19:18,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553011189] [2022-11-23 15:19:18,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:18,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:18,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:18,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:18,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:19:18,236 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:18,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:18,304 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-11-23 15:19:18,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:18,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-23 15:19:18,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:18,305 INFO L225 Difference]: With dead ends: 90 [2022-11-23 15:19:18,305 INFO L226 Difference]: Without dead ends: 90 [2022-11-23 15:19:18,306 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 [2022-11-23 15:19:18,307 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 54 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:18,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 47 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:18,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-23 15:19:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2022-11-23 15:19:18,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 48 states have (on average 1.7916666666666667) internal successors, (86), 79 states have internal predecessors, (86), 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) [2022-11-23 15:19:18,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-11-23 15:19:18,322 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 19 [2022-11-23 15:19:18,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:18,323 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-11-23 15:19:18,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-11-23 15:19:18,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 15:19:18,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:18,324 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:18,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:19:18,325 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:18,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:18,325 INFO L85 PathProgramCache]: Analyzing trace with hash -288796837, now seen corresponding path program 1 times [2022-11-23 15:19:18,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:18,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5113939] [2022-11-23 15:19:18,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:18,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:19:18,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:18,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5113939] [2022-11-23 15:19:18,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5113939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:18,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:18,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:19:18,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051916982] [2022-11-23 15:19:18,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:18,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:18,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:18,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:18,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:19:18,436 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:18,493 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2022-11-23 15:19:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:18,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-23 15:19:18,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:18,494 INFO L225 Difference]: With dead ends: 77 [2022-11-23 15:19:18,495 INFO L226 Difference]: Without dead ends: 77 [2022-11-23 15:19:18,495 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 [2022-11-23 15:19:18,496 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 54 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:18,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 43 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:18,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-23 15:19:18,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-23 15:19:18,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 76 states have internal predecessors, (83), 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) [2022-11-23 15:19:18,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2022-11-23 15:19:18,500 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 19 [2022-11-23 15:19:18,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:18,501 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2022-11-23 15:19:18,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:18,501 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2022-11-23 15:19:18,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 15:19:18,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:18,502 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:18,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:19:18,502 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:18,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash -727074723, now seen corresponding path program 1 times [2022-11-23 15:19:18,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:18,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988424503] [2022-11-23 15:19:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:18,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:19:18,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:18,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988424503] [2022-11-23 15:19:18,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988424503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:18,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131973844] [2022-11-23 15:19:18,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:18,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:18,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:18,912 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:18,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:19:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:19,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 15:19:19,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:19,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:19:19,077 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:19:19,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-23 15:19:19,180 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:19:19,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-23 15:19:19,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:19,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 15:19:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:19:19,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:19:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:19:19,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131973844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:19:19,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2000415027] [2022-11-23 15:19:19,721 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:19:19,721 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:19:19,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:19:19,721 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:19:19,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:19:19,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:19,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:19,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 15:19:19,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:19,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:19,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:19,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:19,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:19,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-23 15:19:19,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:19,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 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 [2022-11-23 15:19:19,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 15:19:19,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 15:19:19,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:19,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:19,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-23 15:19:19,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:19:19,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:19:19,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 15:19:19,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:19,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:19,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-23 15:19:19,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 15:19:20,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-23 15:19:20,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 15:19:20,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 15:19:20,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-23 15:19:20,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 15:19:20,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-23 15:19:20,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 15:19:20,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-23 15:19:20,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-23 15:19:20,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-23 15:19:20,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-23 15:19:20,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:20,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2022-11-23 15:19:20,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:20,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2022-11-23 15:19:20,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-23 15:19:20,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-23 15:19:20,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2022-11-23 15:19:20,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2022-11-23 15:19:20,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-23 15:19:20,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-23 15:19:20,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-23 15:19:20,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-23 15:19:20,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-23 15:19:20,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:20,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-23 15:19:21,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 49 [2022-11-23 15:19:21,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-23 15:19:21,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 49 [2022-11-23 15:19:21,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:19:21,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:19:21,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:19:21,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 15:19:21,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 15:19:21,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,508 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:19:21,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 15:19:21,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:19:21,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 15:19:21,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:19:21,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:21,625 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-23 15:19:21,626 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 41 treesize of output 39 [2022-11-23 15:19:21,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:21,663 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-23 15:19:21,664 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 41 treesize of output 39 [2022-11-23 15:19:21,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:19:21,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:19:21,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:19:21,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 15:19:21,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 15:19:21,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:19:21,844 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 13 treesize of output 9 [2022-11-23 15:19:21,856 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 13 treesize of output 9 [2022-11-23 15:19:21,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:21,875 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:19:21,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 230 treesize of output 216 [2022-11-23 15:19:21,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:21,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:21,977 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:19:21,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 230 treesize of output 216 [2022-11-23 15:19:22,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 15:19:22,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 15:19:22,074 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:19:26,103 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1778#(and (<= 1 |ULTIMATE.start_dll_create_~data#1|) (= |ULTIMATE.start_node_create_~data#1| |ULTIMATE.start_node_create_#in~data#1|) (= (select (select |#memory_int| |ULTIMATE.start_node_create_~temp~0#1.base|) |ULTIMATE.start_node_create_~temp~0#1.offset|) |ULTIMATE.start_node_create_~data#1|) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (= |ULTIMATE.start_dll_create_~head~0#1.offset| |ULTIMATE.start_dll_create_#res#1.offset|) (= (select |#valid| |ULTIMATE.start_node_create_~temp~0#1.base|) 1) (= |ULTIMATE.start_dll_prepend_#in~head#1.offset| |ULTIMATE.start_dll_prepend_~head#1.offset|) (= |ULTIMATE.start_dll_prepend_~new_head~1#1.offset| |ULTIMATE.start_node_create_#res#1.offset|) (= |ULTIMATE.start_main_~data~0#1| |ULTIMATE.start_dll_prepend_#in~data#1|) (= |ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= |ULTIMATE.start_node_create_~temp~0#1.offset| |ULTIMATE.start_node_create_#res#1.offset|) (= |ULTIMATE.start_dll_prepend_#in~head#1.base| |ULTIMATE.start_dll_prepend_~head#1.base|) (= 12 (select |#length| |ULTIMATE.start_node_create_~temp~0#1.base|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_node_create_~temp~0#1.base|) (+ |ULTIMATE.start_node_create_~temp~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_node_create_~temp~0#1.base|) (+ |ULTIMATE.start_node_create_~temp~0#1.offset| 8)) 0) (= |ULTIMATE.start_dll_prepend_#in~data#1| |ULTIMATE.start_dll_prepend_~data#1|) (<= |ULTIMATE.start_dll_create_~data#1| 1) (= |ULTIMATE.start_dll_create_#res#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (= |ULTIMATE.start_dll_create_~head~0#1.base| |ULTIMATE.start_dll_create_#res#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_dll_create_#res#1.offset|) (= |ULTIMATE.start_node_create_#in~data#1| |ULTIMATE.start_dll_prepend_~data#1|) (= |ULTIMATE.start_node_create_#res#1.base| |ULTIMATE.start_node_create_~temp~0#1.base|) (= |ULTIMATE.start_dll_prepend_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_dll_create_~len#1|) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_create_~len#1| 0) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_node_create_~temp~0#1.base|) (+ |ULTIMATE.start_node_create_~temp~0#1.offset| 4)) 0) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (< |ULTIMATE.start_node_create_~temp~0#1.base| |#StackHeapBarrier|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_node_create_~temp~0#1.base|) (+ |ULTIMATE.start_node_create_~temp~0#1.offset| 8)) 0) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_prepend_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_dll_prepend_~head#1.base|) 1)) (= |ULTIMATE.start_dll_prepend_~new_head~1#1.base| |ULTIMATE.start_node_create_#res#1.base|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (not (= |ULTIMATE.start_node_create_~temp~0#1.base| 0)) (= |#NULL.base| 0))' at error location [2022-11-23 15:19:26,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:19:26,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:19:26,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-11-23 15:19:26,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69227923] [2022-11-23 15:19:26,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:19:26,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 15:19:26,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:26,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 15:19:26,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-11-23 15:19:26,105 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 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) [2022-11-23 15:19:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:26,243 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2022-11-23 15:19:26,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:19:26,244 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 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 22 [2022-11-23 15:19:26,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:26,244 INFO L225 Difference]: With dead ends: 81 [2022-11-23 15:19:26,244 INFO L226 Difference]: Without dead ends: 81 [2022-11-23 15:19:26,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-11-23 15:19:26,246 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 294 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:26,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 54 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:26,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-23 15:19:26,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2022-11-23 15:19:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 70 states have internal predecessors, (77), 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) [2022-11-23 15:19:26,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2022-11-23 15:19:26,249 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 22 [2022-11-23 15:19:26,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:26,250 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2022-11-23 15:19:26,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 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) [2022-11-23 15:19:26,250 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2022-11-23 15:19:26,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 15:19:26,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:26,251 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:26,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:19:26,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:26,451 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:26,452 INFO L85 PathProgramCache]: Analyzing trace with hash -727074722, now seen corresponding path program 1 times [2022-11-23 15:19:26,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:26,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681823787] [2022-11-23 15:19:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:26,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:19:27,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:27,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681823787] [2022-11-23 15:19:27,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681823787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:27,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391278767] [2022-11-23 15:19:27,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:27,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:27,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:27,049 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:27,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:19:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:27,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 15:19:27,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:27,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:19:27,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:27,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 15:19:27,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:27,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 15:19:27,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:27,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 15:19:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:19:27,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:19:27,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391278767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:27,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:19:27,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-11-23 15:19:27,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112949415] [2022-11-23 15:19:27,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:27,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:19:27,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:27,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:19:27,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:19:27,352 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-23 15:19:27,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:27,427 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-11-23 15:19:27,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:19:27,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) Word has length 22 [2022-11-23 15:19:27,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:27,429 INFO L225 Difference]: With dead ends: 65 [2022-11-23 15:19:27,429 INFO L226 Difference]: Without dead ends: 65 [2022-11-23 15:19:27,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:19:27,429 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 82 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:27,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 31 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:27,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-23 15:19:27,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-23 15:19:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 64 states have internal predecessors, (71), 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) [2022-11-23 15:19:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-11-23 15:19:27,432 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 22 [2022-11-23 15:19:27,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:27,433 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-11-23 15:19:27,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-23 15:19:27,433 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-11-23 15:19:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 15:19:27,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:27,433 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-23 15:19:27,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:19:27,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:19:27,640 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:27,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:27,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1532969926, now seen corresponding path program 1 times [2022-11-23 15:19:27,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:27,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676309154] [2022-11-23 15:19:27,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:27,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:19:27,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:27,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676309154] [2022-11-23 15:19:27,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676309154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:27,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967352212] [2022-11-23 15:19:27,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:27,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:27,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:27,738 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:27,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:19:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:27,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:19:27,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:19:27,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:19:27,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967352212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:27,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:19:27,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-23 15:19:27,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424425435] [2022-11-23 15:19:27,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:27,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:19:27,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:27,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:19:27,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:27,924 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2022-11-23 15:19:27,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:27,954 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2022-11-23 15:19:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:19:27,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 23 [2022-11-23 15:19:27,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:27,957 INFO L225 Difference]: With dead ends: 59 [2022-11-23 15:19:27,957 INFO L226 Difference]: Without dead ends: 57 [2022-11-23 15:19:27,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:27,958 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 91 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:27,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 62 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:19:27,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-23 15:19:27,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-23 15:19:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 56 states have internal predecessors, (60), 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) [2022-11-23 15:19:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-11-23 15:19:27,966 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 23 [2022-11-23 15:19:27,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:27,967 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-11-23 15:19:27,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2022-11-23 15:19:27,967 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-11-23 15:19:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 15:19:27,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:27,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:27,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 15:19:28,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:28,174 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:28,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:28,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1064479892, now seen corresponding path program 1 times [2022-11-23 15:19:28,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:28,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377515108] [2022-11-23 15:19:28,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:28,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:19:28,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:28,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377515108] [2022-11-23 15:19:28,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377515108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:28,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:28,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:19:28,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859944628] [2022-11-23 15:19:28,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:28,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:19:28,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:28,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:19:28,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:19:28,259 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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) [2022-11-23 15:19:28,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:28,326 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2022-11-23 15:19:28,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:19:28,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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 23 [2022-11-23 15:19:28,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:28,327 INFO L225 Difference]: With dead ends: 66 [2022-11-23 15:19:28,328 INFO L226 Difference]: Without dead ends: 66 [2022-11-23 15:19:28,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:19:28,328 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 71 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:28,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 47 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:28,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-23 15:19:28,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2022-11-23 15:19:28,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 55 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2022-11-23 15:19:28,331 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 23 [2022-11-23 15:19:28,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:28,332 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2022-11-23 15:19:28,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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) [2022-11-23 15:19:28,332 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2022-11-23 15:19:28,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 15:19:28,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:28,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:28,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 15:19:28,333 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:28,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:28,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1064479891, now seen corresponding path program 1 times [2022-11-23 15:19:28,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:28,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651509082] [2022-11-23 15:19:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:28,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:19:28,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:28,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651509082] [2022-11-23 15:19:28,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651509082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:28,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:28,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:19:28,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279518919] [2022-11-23 15:19:28,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:28,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:19:28,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:28,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:19:28,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:19:28,481 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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) [2022-11-23 15:19:28,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:28,545 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-11-23 15:19:28,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:19:28,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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 23 [2022-11-23 15:19:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:28,547 INFO L225 Difference]: With dead ends: 55 [2022-11-23 15:19:28,547 INFO L226 Difference]: Without dead ends: 55 [2022-11-23 15:19:28,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:28,548 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 115 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:28,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 42 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:19:28,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-23 15:19:28,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-23 15:19:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.380952380952381) internal successors, (58), 54 states have internal predecessors, (58), 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) [2022-11-23 15:19:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-11-23 15:19:28,550 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 23 [2022-11-23 15:19:28,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:28,551 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-11-23 15:19:28,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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) [2022-11-23 15:19:28,551 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-11-23 15:19:28,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 15:19:28,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:28,552 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:28,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 15:19:28,552 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:28,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:28,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1329740313, now seen corresponding path program 1 times [2022-11-23 15:19:28,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:28,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029392890] [2022-11-23 15:19:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:28,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:19:28,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:28,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029392890] [2022-11-23 15:19:28,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029392890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:28,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:28,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:19:28,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435659577] [2022-11-23 15:19:28,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:28,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:19:28,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:28,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:19:28,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:19:28,991 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:29,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:29,284 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2022-11-23 15:19:29,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:19:29,285 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-23 15:19:29,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:29,285 INFO L225 Difference]: With dead ends: 65 [2022-11-23 15:19:29,285 INFO L226 Difference]: Without dead ends: 65 [2022-11-23 15:19:29,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:19:29,286 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 177 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:29,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 71 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:19:29,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-23 15:19:29,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2022-11-23 15:19:29,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 53 states have internal predecessors, (57), 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) [2022-11-23 15:19:29,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-11-23 15:19:29,288 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 27 [2022-11-23 15:19:29,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:29,288 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-11-23 15:19:29,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:29,289 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-11-23 15:19:29,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 15:19:29,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:29,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:29,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 15:19:29,290 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:29,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:29,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1329740314, now seen corresponding path program 1 times [2022-11-23 15:19:29,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:29,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503099804] [2022-11-23 15:19:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:29,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:19:29,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:29,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503099804] [2022-11-23 15:19:29,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503099804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:29,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:29,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:19:29,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265578000] [2022-11-23 15:19:29,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:29,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:19:29,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:29,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:19:29,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:19:29,880 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:30,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:30,073 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2022-11-23 15:19:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:19:30,073 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-23 15:19:30,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:30,074 INFO L225 Difference]: With dead ends: 54 [2022-11-23 15:19:30,074 INFO L226 Difference]: Without dead ends: 54 [2022-11-23 15:19:30,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:19:30,077 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 138 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:30,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 53 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:30,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-23 15:19:30,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-11-23 15:19:30,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 52 states have internal predecessors, (56), 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) [2022-11-23 15:19:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-11-23 15:19:30,080 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 27 [2022-11-23 15:19:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:30,081 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-11-23 15:19:30,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:30,081 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-11-23 15:19:30,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 15:19:30,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:30,084 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:30,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 15:19:30,085 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:30,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:30,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2008737315, now seen corresponding path program 1 times [2022-11-23 15:19:30,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:30,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397637718] [2022-11-23 15:19:30,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:30,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:19:30,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:30,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397637718] [2022-11-23 15:19:30,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397637718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:30,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:30,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:19:30,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383013495] [2022-11-23 15:19:30,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:30,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:19:30,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:30,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:19:30,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:30,328 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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) [2022-11-23 15:19:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:30,434 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2022-11-23 15:19:30,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:19:30,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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 29 [2022-11-23 15:19:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:30,435 INFO L225 Difference]: With dead ends: 79 [2022-11-23 15:19:30,435 INFO L226 Difference]: Without dead ends: 79 [2022-11-23 15:19:30,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:19:30,436 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 163 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:30,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 72 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:30,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-23 15:19:30,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 54. [2022-11-23 15:19:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2022-11-23 15:19:30,438 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 29 [2022-11-23 15:19:30,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:30,438 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2022-11-23 15:19:30,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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) [2022-11-23 15:19:30,438 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2022-11-23 15:19:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 15:19:30,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:30,439 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:30,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 15:19:30,439 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:30,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:30,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2008737314, now seen corresponding path program 1 times [2022-11-23 15:19:30,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:30,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865557757] [2022-11-23 15:19:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:30,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:19:30,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:30,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865557757] [2022-11-23 15:19:30,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865557757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:30,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:30,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:19:30,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550152534] [2022-11-23 15:19:30,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:30,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:19:30,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:30,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:19:30,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:30,873 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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) [2022-11-23 15:19:31,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:31,017 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2022-11-23 15:19:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:19:31,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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 29 [2022-11-23 15:19:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:31,019 INFO L225 Difference]: With dead ends: 72 [2022-11-23 15:19:31,019 INFO L226 Difference]: Without dead ends: 72 [2022-11-23 15:19:31,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:19:31,019 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 165 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:31,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 62 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:31,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-23 15:19:31,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2022-11-23 15:19:31,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 54 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:19:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-11-23 15:19:31,022 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 29 [2022-11-23 15:19:31,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:31,022 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-11-23 15:19:31,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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) [2022-11-23 15:19:31,022 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-11-23 15:19:31,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 15:19:31,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:31,022 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:31,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 15:19:31,023 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:31,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:31,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2141241893, now seen corresponding path program 1 times [2022-11-23 15:19:31,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:31,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697787152] [2022-11-23 15:19:31,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:31,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:19:31,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:31,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697787152] [2022-11-23 15:19:31,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697787152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:31,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:31,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:19:31,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678767400] [2022-11-23 15:19:31,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:31,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:19:31,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:31,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:19:31,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:31,240 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2022-11-23 15:19:31,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:31,344 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-11-23 15:19:31,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:19:31,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 [2022-11-23 15:19:31,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:31,345 INFO L225 Difference]: With dead ends: 58 [2022-11-23 15:19:31,345 INFO L226 Difference]: Without dead ends: 58 [2022-11-23 15:19:31,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:19:31,346 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 108 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:31,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 82 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:31,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-23 15:19:31,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-11-23 15:19:31,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.288888888888889) internal successors, (58), 54 states have internal predecessors, (58), 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) [2022-11-23 15:19:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-11-23 15:19:31,348 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 30 [2022-11-23 15:19:31,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:31,348 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-11-23 15:19:31,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2022-11-23 15:19:31,348 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-11-23 15:19:31,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 15:19:31,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:31,349 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:31,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 15:19:31,349 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:31,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:31,349 INFO L85 PathProgramCache]: Analyzing trace with hash -512026756, now seen corresponding path program 1 times [2022-11-23 15:19:31,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:31,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519081870] [2022-11-23 15:19:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:31,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:19:31,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:31,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519081870] [2022-11-23 15:19:31,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519081870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:31,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:31,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 15:19:31,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973922854] [2022-11-23 15:19:31,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:31,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:19:31,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:31,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:19:31,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:19:31,764 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 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) [2022-11-23 15:19:31,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:31,970 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2022-11-23 15:19:31,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:19:31,970 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 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 32 [2022-11-23 15:19:31,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:31,971 INFO L225 Difference]: With dead ends: 55 [2022-11-23 15:19:31,971 INFO L226 Difference]: Without dead ends: 55 [2022-11-23 15:19:31,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:19:31,972 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 95 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:31,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 59 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:31,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-23 15:19:31,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-23 15:19:31,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 54 states have internal predecessors, (57), 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) [2022-11-23 15:19:31,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2022-11-23 15:19:31,975 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 32 [2022-11-23 15:19:31,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:31,976 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2022-11-23 15:19:31,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 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) [2022-11-23 15:19:31,976 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2022-11-23 15:19:31,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 15:19:31,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:31,977 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:31,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 15:19:31,977 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:31,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:31,977 INFO L85 PathProgramCache]: Analyzing trace with hash -211100282, now seen corresponding path program 1 times [2022-11-23 15:19:31,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:31,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446286841] [2022-11-23 15:19:31,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:31,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:19:32,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:32,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446286841] [2022-11-23 15:19:32,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446286841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:32,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:32,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-23 15:19:32,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276927739] [2022-11-23 15:19:32,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:32,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 15:19:32,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:32,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 15:19:32,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:19:32,951 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-11-23 15:19:33,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:33,519 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-11-23 15:19:33,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 15:19:33,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 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 34 [2022-11-23 15:19:33,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:33,520 INFO L225 Difference]: With dead ends: 66 [2022-11-23 15:19:33,520 INFO L226 Difference]: Without dead ends: 66 [2022-11-23 15:19:33,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-11-23 15:19:33,521 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 222 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:33,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 82 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:19:33,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-23 15:19:33,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2022-11-23 15:19:33,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 55 states have internal predecessors, (58), 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) [2022-11-23 15:19:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-11-23 15:19:33,523 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 34 [2022-11-23 15:19:33,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:33,524 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-11-23 15:19:33,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-11-23 15:19:33,524 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-11-23 15:19:33,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 15:19:33,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:33,524 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:33,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 15:19:33,525 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:19:33,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:33,525 INFO L85 PathProgramCache]: Analyzing trace with hash 2045826363, now seen corresponding path program 1 times [2022-11-23 15:19:33,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:33,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167108672] [2022-11-23 15:19:33,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:33,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:19:34,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:34,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167108672] [2022-11-23 15:19:34,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167108672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:34,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58982985] [2022-11-23 15:19:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:34,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:34,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:34,747 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:34,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:19:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:34,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-23 15:19:34,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:35,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:19:35,166 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-23 15:19:35,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:19:35,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:35,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-23 15:19:35,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:35,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-23 15:19:35,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:35,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-23 15:19:35,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:35,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-23 15:19:35,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:35,598 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-23 15:19:35,599 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 43 treesize of output 49 [2022-11-23 15:19:35,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-11-23 15:19:35,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:35,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 38 [2022-11-23 15:19:35,718 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 11 treesize of output 7 [2022-11-23 15:19:35,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 15:19:35,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:35,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:35,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:19:35,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 24 [2022-11-23 15:19:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:19:35,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:19:35,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2022-11-23 15:19:56,256 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:19:56,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:19:56,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 220 [2022-11-23 15:20:03,099 WARN L233 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 54 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:20:08,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6074 treesize of output 5416 [2022-11-23 15:20:09,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:20:09,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 5536 treesize of output 4876 [2022-11-23 15:20:09,173 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:20:09,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 5458 treesize of output 5220 [2022-11-23 15:20:09,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:20:09,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7242 treesize of output 6506 [2022-11-23 15:20:20,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 15:20:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:20:20,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58982985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:20:20,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1024799383] [2022-11-23 15:20:20,891 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-23 15:20:20,891 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:20:20,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:20:20,892 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:20:20,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:20:20,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:20,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:20,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 15:20:20,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:20,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:20,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:20,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:20,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:20,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-23 15:20:20,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:20,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 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 [2022-11-23 15:20:21,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 15:20:21,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 15:20:21,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-23 15:20:21,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:20:21,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:20:21,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-23 15:20:21,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 15:20:21,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 15:20:21,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-23 15:20:21,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 15:20:21,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-23 15:20:21,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 15:20:21,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 15:20:21,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-23 15:20:21,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 15:20:21,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-23 15:20:21,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-23 15:20:21,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-23 15:20:21,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:20:21,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2022-11-23 15:20:21,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:20:21,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2022-11-23 15:20:21,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-23 15:20:21,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:21,976 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-23 15:20:21,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 51 [2022-11-23 15:20:22,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2022-11-23 15:20:22,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2022-11-23 15:20:22,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-23 15:20:22,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-23 15:20:22,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-23 15:20:22,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-23 15:20:22,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-23 15:20:22,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-23 15:20:22,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-23 15:20:22,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 49 [2022-11-23 15:20:22,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-23 15:20:22,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 49 [2022-11-23 15:20:22,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:20:22,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:20:22,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 15:20:22,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 15:20:22,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:20:22,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:20:22,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:20:22,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-23 15:20:22,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-23 15:20:22,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 15:20:22,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 15:20:22,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:20:22,639 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 15:20:22,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 38 [2022-11-23 15:20:22,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-23 15:20:22,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:20:22,686 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-23 15:20:22,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-23 15:20:22,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:20:22,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:20:22,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 15:20:22,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 15:20:22,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:20:22,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:20:22,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:20:22,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-23 15:20:22,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 15:20:22,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-23 15:20:22,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 15:20:22,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:20:22,925 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-23 15:20:22,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-23 15:20:22,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:20:22,951 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 15:20:22,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 38 [2022-11-23 15:20:22,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:22,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-23 15:20:23,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:20:23,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:20:23,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 15:20:23,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 15:20:23,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:20:23,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:20:23,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 15:20:23,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:20:23,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:20:23,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 15:20:23,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:20:23,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:20:23,328 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-23 15:20:23,328 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 41 treesize of output 39 [2022-11-23 15:20:23,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:20:23,383 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-23 15:20:23,384 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 41 treesize of output 39 [2022-11-23 15:20:23,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:20:23,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,477 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:20:23,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 39 [2022-11-23 15:20:23,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-23 15:20:23,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:20:23,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,546 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:20:23,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 39 [2022-11-23 15:20:23,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,756 INFO L321 Elim1Store]: treesize reduction 96, result has 28.4 percent of original size [2022-11-23 15:20:23,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 166 treesize of output 140 [2022-11-23 15:20:23,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:23,876 INFO L321 Elim1Store]: treesize reduction 82, result has 38.8 percent of original size [2022-11-23 15:20:23,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 181 treesize of output 175 [2022-11-23 15:20:23,930 INFO L321 Elim1Store]: treesize reduction 33, result has 38.9 percent of original size [2022-11-23 15:20:23,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 25 [2022-11-23 15:20:24,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:24,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:24,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:24,138 INFO L321 Elim1Store]: treesize reduction 120, result has 21.6 percent of original size [2022-11-23 15:20:24,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 333 treesize of output 280 [2022-11-23 15:20:24,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:20:24,185 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-23 15:20:24,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 320 treesize of output 308 [2022-11-23 15:20:24,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:24,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:24,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:24,284 INFO L321 Elim1Store]: treesize reduction 124, result has 32.2 percent of original size [2022-11-23 15:20:24,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 317 treesize of output 314 [2022-11-23 15:20:24,754 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:20:24,760 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:20:30,391 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:20:30,395 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:20:37,892 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:20:37,896 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:20:39,480 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:20:39,484 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 15:20:41,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:20:41,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:20:41,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 15:20:41,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 15:20:41,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:20:41,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:20:41,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:20:41,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:41,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-23 15:20:41,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:41,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-23 15:20:41,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 15:20:41,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 15:20:41,487 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:20:52,014 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3773#(and (<= |ULTIMATE.start_dll_prepend_~data#1| 1) (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 1 |ULTIMATE.start_dll_create_~data#1|) (<= |ULTIMATE.start_dll_prepend_#in~head#1.offset| 0) (<= 1 |ULTIMATE.start_node_create_~data#1|) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_dll_prepend_#in~data#1|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (<= |ULTIMATE.start_dll_prepend_#in~data#1| 1) (<= |ULTIMATE.start_dll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_dll_prepend_~head#1.offset|) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (<= 0 |ULTIMATE.start_dll_prepend_#in~head#1.base|) (<= |ULTIMATE.start_dll_prepend_~head#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~ptr~0#1.base|) 1)) (<= 0 |ULTIMATE.start_node_create_#res#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_dll_prepend_#in~head#1.offset|) (<= |ULTIMATE.start_dll_create_~data#1| 1) (<= 0 |ULTIMATE.start_dll_prepend_~head#1.base|) (<= 0 |ULTIMATE.start_dll_prepend_~new_head~1#1.offset|) (<= 1 |ULTIMATE.start_node_create_#in~data#1|) (<= |ULTIMATE.start_node_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_prepend_~new_head~1#1.offset| 0) (<= 0 (+ |ULTIMATE.start_dll_create_~len#1| 1)) (<= |ULTIMATE.start_node_create_#in~data#1| 1) (<= 0 |ULTIMATE.start_node_create_~temp~0#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (<= 1 |ULTIMATE.start_dll_prepend_~data#1|) (<= |ULTIMATE.start_dll_create_~len#1| 0) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_node_create_~temp~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (<= 0 |#NULL.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= |ULTIMATE.start_node_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_create_#res#1.offset|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|))' at error location [2022-11-23 15:20:52,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:20:52,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:20:52,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2022-11-23 15:20:52,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757258777] [2022-11-23 15:20:52,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:20:52,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-23 15:20:52,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:20:52,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-23 15:20:52,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=3521, Unknown=19, NotChecked=0, Total=3782 [2022-11-23 15:20:52,018 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 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) [2022-11-23 15:20:54,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:20:54,072 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2022-11-23 15:20:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 15:20:54,073 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 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 35 [2022-11-23 15:20:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:20:54,073 INFO L225 Difference]: With dead ends: 85 [2022-11-23 15:20:54,073 INFO L226 Difference]: Without dead ends: 85 [2022-11-23 15:20:54,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 44.0s TimeCoverageRelationStatistics Valid=507, Invalid=5024, Unknown=19, NotChecked=0, Total=5550 [2022-11-23 15:20:54,075 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 488 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:20:54,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 209 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 15:20:54,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-23 15:20:54,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2022-11-23 15:20:54,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 57 states have internal predecessors, (62), 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) [2022-11-23 15:20:54,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-11-23 15:20:54,078 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 35 [2022-11-23 15:20:54,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:20:54,083 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-11-23 15:20:54,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 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) [2022-11-23 15:20:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-11-23 15:20:54,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 15:20:54,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:20:54,084 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:20:54,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:20:54,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:54,291 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-23 15:20:54,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:20:54,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2045826364, now seen corresponding path program 1 times [2022-11-23 15:20:54,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:20:54,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497749003] [2022-11-23 15:20:54,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:54,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:20:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:20:56,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:20:56,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497749003] [2022-11-23 15:20:56,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497749003] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:20:56,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496544167] [2022-11-23 15:20:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:56,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:56,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:20:56,479 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:20:56,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31e36daf-f299-43c9-bd19-ee85b888a2cf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:20:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:56,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-23 15:20:56,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:20:56,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:20:56,944 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-23 15:20:56,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:20:57,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:57,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-23 15:20:57,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:57,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 15:20:57,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:57,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-23 15:20:57,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:57,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 15:20:57,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:57,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 15:20:57,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:57,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-23 15:20:57,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:57,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-23 15:20:57,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:57,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-23 15:20:57,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:57,555 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-23 15:20:57,556 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 59 treesize of output 63 [2022-11-23 15:20:57,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:57,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:57,585 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 15:20:57,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 49 [2022-11-23 15:20:57,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-23 15:20:57,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2022-11-23 15:20:57,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:57,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 69 [2022-11-23 15:20:57,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:57,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 65 [2022-11-23 15:20:58,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:20:58,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:58,027 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:20:58,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 40 [2022-11-23 15:20:58,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:20:58,042 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-23 15:20:58,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 16 [2022-11-23 15:20:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:20:58,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:20:58,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:20:58,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 194 [2022-11-23 15:20:58,523 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1742 (Array Int Int))) (let ((.cse0 (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base| v_ArrVal_1742))) (store .cse3 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse3 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.offset|))))) (let ((.cse2 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_ArrVal_1743 (Array Int Int))) (<= 0 (+ 4 (select (select .cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base| v_ArrVal_1743))) (store .cse1 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ .cse2 4))))) (not (<= 0 .cse2)))))) (forall ((v_ArrVal_1742 (Array Int Int))) (let ((.cse6 (select (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base| v_ArrVal_1742))) (store .cse7 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse7 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_ArrVal_1743 (Array Int Int))) (= |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base| (select (let ((.cse4 (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base| v_ArrVal_1743))) (store .cse5 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse5 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.base|))))) (select .cse4 (select (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (+ .cse6 4)))) (not (<= 0 .cse6))))) (forall ((v_ArrVal_1742 (Array Int Int))) (let ((.cse8 (let ((.cse11 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base| v_ArrVal_1742))) (store .cse11 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse11 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.offset|))))) (let ((.cse10 (select (select .cse8 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_ArrVal_1743 (Array Int Int))) (< (select (select .cse8 (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base| v_ArrVal_1743))) (store .cse9 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse9 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ .cse10 4)) (+ |c_ULTIMATE.start_dll_prepend_#t~mem10#1.offset| 5))) (not (<= 0 .cse10))))))) is different from false [2022-11-23 15:20:58,570 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))) (and (forall ((v_ArrVal_1743 (Array Int Int)) (v_ArrVal_1742 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_1742))) (store .cse4 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse4 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (<= 0 .cse0)) (= (select (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_1743))) (store .cse2 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.base|))))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (+ .cse0 4)) .cse3)))) (forall ((v_ArrVal_1743 (Array Int Int)) (v_ArrVal_1742 (Array Int Int))) (let ((.cse6 (let ((.cse8 (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_1742))) (store .cse8 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse8 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.offset|))))) (let ((.cse5 (select (select .cse6 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (<= 0 .cse5)) (< (select (select .cse6 (select (select (let ((.cse7 (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_1743))) (store .cse7 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse7 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ .cse5 4)) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|) 5)))))) (forall ((v_ArrVal_1743 (Array Int Int)) (v_ArrVal_1742 (Array Int Int))) (let ((.cse10 (let ((.cse12 (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_1742))) (store .cse12 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse12 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.offset|))))) (let ((.cse9 (select (select .cse10 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (<= 0 .cse9)) (<= 0 (+ (select (select .cse10 (select (select (let ((.cse11 (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_1743))) (store .cse11 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse11 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ .cse9 4)) 4)))))))) is different from false [2022-11-23 15:20:59,686 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (+ 4 |c_ULTIMATE.start_node_create_~temp~0#1.offset|))) (and (forall ((v_ArrVal_1736 (Array Int Int)) (v_ArrVal_1743 (Array Int Int)) (v_ArrVal_1742 (Array Int Int)) (v_ArrVal_1737 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store v_ArrVal_1737 .cse6 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1737) |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))) (let ((.cse1 (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store v_ArrVal_1736 .cse6 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1736) |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))) .cse4 v_ArrVal_1742))) (store .cse5 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse5 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_node_create_~temp~0#1.offset|))))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (<= 0 .cse0)) (<= 0 (+ (select (select .cse1 (select (select (let ((.cse2 (store .cse3 .cse4 v_ArrVal_1743))) (store .cse2 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ .cse0 4)) 4)))))))) (forall ((v_ArrVal_1736 (Array Int Int)) (v_ArrVal_1743 (Array Int Int)) (v_ArrVal_1742 (Array Int Int)) (v_ArrVal_1737 (Array Int Int))) (let ((.cse10 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store v_ArrVal_1737 .cse6 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1737) |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))))) (let ((.cse7 (select (select .cse10 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))) (let ((.cse11 (select (select (let ((.cse12 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store v_ArrVal_1736 .cse6 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1736) |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))) .cse7 v_ArrVal_1742))) (store .cse12 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse12 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_node_create_~temp~0#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= .cse7 (select (let ((.cse8 (let ((.cse9 (store .cse10 .cse7 v_ArrVal_1743))) (store .cse9 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse9 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base|))))) (select .cse8 (select (select .cse8 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (+ .cse11 4))) (not (<= 0 .cse11))))))) (forall ((v_ArrVal_1736 (Array Int Int)) (v_ArrVal_1743 (Array Int Int)) (v_ArrVal_1742 (Array Int Int)) (v_ArrVal_1737 (Array Int Int))) (let ((.cse16 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store v_ArrVal_1737 .cse6 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1737) |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))))) (let ((.cse18 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store v_ArrVal_1736 .cse6 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1736) |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|)))) (.cse17 (select (select .cse16 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))) (let ((.cse14 (let ((.cse19 (store .cse18 .cse17 v_ArrVal_1742))) (store .cse19 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse19 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_node_create_~temp~0#1.offset|))))) (let ((.cse13 (select (select .cse14 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (<= 0 .cse13)) (< (select (select .cse14 (select (select (let ((.cse15 (store .cse16 .cse17 v_ArrVal_1743))) (store .cse15 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse15 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ .cse13 4)) (+ 5 (select (select .cse18 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))))))))))) is different from false [2022-11-23 15:20:59,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11095 treesize of output 10629 [2022-11-23 15:21:00,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:21:00,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 10813 treesize of output 10323 [2022-11-23 15:21:00,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22165 treesize of output 20637 [2022-11-23 15:21:00,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21152 treesize of output 20832 [2022-11-23 15:21:01,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:21:01,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20405 treesize of output 18905 [2022-11-23 15:21:01,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18984 treesize of output 18904 [2022-11-23 15:21:01,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20082 treesize of output 19234 [2022-11-23 15:21:01,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20186 treesize of output 19874 [2022-11-23 15:21:01,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19776 treesize of output 19460 [2022-11-23 15:21:02,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19579 treesize of output 19403 [2022-11-23 15:21:02,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19427 treesize of output 19407 [2022-11-23 15:21:02,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19391 treesize of output 19377