./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 10:28:42,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 10:28:42,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 10:28:42,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 10:28:42,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 10:28:42,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 10:28:42,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 10:28:42,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 10:28:42,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 10:28:43,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 10:28:43,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 10:28:43,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 10:28:43,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 10:28:43,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 10:28:43,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 10:28:43,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 10:28:43,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 10:28:43,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 10:28:43,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 10:28:43,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 10:28:43,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 10:28:43,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 10:28:43,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 10:28:43,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 10:28:43,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 10:28:43,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 10:28:43,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 10:28:43,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 10:28:43,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 10:28:43,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 10:28:43,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 10:28:43,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 10:28:43,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 10:28:43,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 10:28:43,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 10:28:43,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 10:28:43,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 10:28:43,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 10:28:43,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 10:28:43,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 10:28:43,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 10:28:43,038 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 10:28:43,067 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 10:28:43,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 10:28:43,068 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 10:28:43,068 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 10:28:43,069 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 10:28:43,069 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 10:28:43,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 10:28:43,070 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 10:28:43,070 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 10:28:43,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 10:28:43,071 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 10:28:43,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 10:28:43,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 10:28:43,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 10:28:43,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 10:28:43,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 10:28:43,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 10:28:43,073 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 10:28:43,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 10:28:43,073 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 10:28:43,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 10:28:43,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 10:28:43,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 10:28:43,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 10:28:43,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:28:43,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 10:28:43,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 10:28:43,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 10:28:43,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 10:28:43,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 10:28:43,076 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 10:28:43,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 10:28:43,076 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 10:28:43,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 10:28:43,077 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 10:28:43,077 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 [2023-02-15 10:28:43,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 10:28:43,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 10:28:43,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 10:28:43,311 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 10:28:43,311 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 10:28:43,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2023-02-15 10:28:44,479 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 10:28:44,724 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 10:28:44,725 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2023-02-15 10:28:44,742 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/350f61599/da1c1e7b28354bdda3553a5221cbeca3/FLAGa988013cc [2023-02-15 10:28:44,758 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/350f61599/da1c1e7b28354bdda3553a5221cbeca3 [2023-02-15 10:28:44,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 10:28:44,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 10:28:44,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 10:28:44,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 10:28:44,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 10:28:44,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:28:44" (1/1) ... [2023-02-15 10:28:44,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@162d14e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:28:44, skipping insertion in model container [2023-02-15 10:28:44,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:28:44" (1/1) ... [2023-02-15 10:28:44,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 10:28:44,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 10:28:45,019 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2023-02-15 10:28:45,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:28:45,071 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 10:28:45,120 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2023-02-15 10:28:45,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:28:45,163 INFO L208 MainTranslator]: Completed translation [2023-02-15 10:28:45,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:28:45 WrapperNode [2023-02-15 10:28:45,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 10:28:45,165 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 10:28:45,165 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 10:28:45,165 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 10:28:45,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:28:45" (1/1) ... [2023-02-15 10:28:45,190 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:28:45" (1/1) ... [2023-02-15 10:28:45,212 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 200 [2023-02-15 10:28:45,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 10:28:45,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 10:28:45,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 10:28:45,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 10:28:45,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:28:45" (1/1) ... [2023-02-15 10:28:45,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:28:45" (1/1) ... [2023-02-15 10:28:45,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:28:45" (1/1) ... [2023-02-15 10:28:45,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:28:45" (1/1) ... [2023-02-15 10:28:45,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:28:45" (1/1) ... [2023-02-15 10:28:45,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:28:45" (1/1) ... [2023-02-15 10:28:45,239 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:28:45" (1/1) ... [2023-02-15 10:28:45,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:28:45" (1/1) ... [2023-02-15 10:28:45,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 10:28:45,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 10:28:45,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 10:28:45,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 10:28:45,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:28:45" (1/1) ... [2023-02-15 10:28:45,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:28:45,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:28:45,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 10:28:45,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 10:28:45,308 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-02-15 10:28:45,309 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-02-15 10:28:45,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 10:28:45,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 10:28:45,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 10:28:45,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 10:28:45,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 10:28:45,309 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2023-02-15 10:28:45,312 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2023-02-15 10:28:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 10:28:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-15 10:28:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2023-02-15 10:28:45,312 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2023-02-15 10:28:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 10:28:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2023-02-15 10:28:45,313 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2023-02-15 10:28:45,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 10:28:45,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 10:28:45,440 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 10:28:45,442 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 10:28:45,823 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 10:28:45,832 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 10:28:45,833 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2023-02-15 10:28:45,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:28:45 BoogieIcfgContainer [2023-02-15 10:28:45,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 10:28:45,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 10:28:45,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 10:28:45,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 10:28:45,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:28:44" (1/3) ... [2023-02-15 10:28:45,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297aa85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:28:45, skipping insertion in model container [2023-02-15 10:28:45,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:28:45" (2/3) ... [2023-02-15 10:28:45,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297aa85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:28:45, skipping insertion in model container [2023-02-15 10:28:45,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:28:45" (3/3) ... [2023-02-15 10:28:45,841 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2023-02-15 10:28:45,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 10:28:45,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 10:28:45,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 10:28:45,924 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@93a11b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 10:28:45,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 10:28:45,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 76 states have (on average 1.6578947368421053) internal successors, (126), 82 states have internal predecessors, (126), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-15 10:28:45,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 10:28:45,937 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:28:45,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:28:45,939 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:28:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:28:45,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1660370747, now seen corresponding path program 1 times [2023-02-15 10:28:45,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:28:45,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67657781] [2023-02-15 10:28:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:28:45,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:28:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:28:46,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:28:46,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67657781] [2023-02-15 10:28:46,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67657781] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:28:46,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:28:46,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 10:28:46,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074556943] [2023-02-15 10:28:46,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:28:46,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 10:28:46,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:28:46,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 10:28:46,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 10:28:46,168 INFO L87 Difference]: Start difference. First operand has 96 states, 76 states have (on average 1.6578947368421053) internal successors, (126), 82 states have internal predecessors, (126), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 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) [2023-02-15 10:28:46,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:28:46,221 INFO L93 Difference]: Finished difference Result 188 states and 326 transitions. [2023-02-15 10:28:46,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 10:28:46,222 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 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) Word has length 16 [2023-02-15 10:28:46,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:28:46,228 INFO L225 Difference]: With dead ends: 188 [2023-02-15 10:28:46,229 INFO L226 Difference]: Without dead ends: 88 [2023-02-15 10:28:46,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 10:28:46,235 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:28:46,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:28:46,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-15 10:28:46,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-02-15 10:28:46,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 75 states have internal predecessors, (83), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 10:28:46,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2023-02-15 10:28:46,269 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 16 [2023-02-15 10:28:46,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:28:46,270 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2023-02-15 10:28:46,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 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) [2023-02-15 10:28:46,270 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2023-02-15 10:28:46,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 10:28:46,271 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:28:46,272 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:28:46,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 10:28:46,272 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:28:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:28:46,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1299807145, now seen corresponding path program 1 times [2023-02-15 10:28:46,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:28:46,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749907237] [2023-02-15 10:28:46,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:28:46,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:28:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:47,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:28:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:47,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 10:28:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:47,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 10:28:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 10:28:48,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:28:48,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749907237] [2023-02-15 10:28:48,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749907237] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:28:48,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052684369] [2023-02-15 10:28:48,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:28:48,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:28:48,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:28:48,139 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:28:48,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 10:28:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:48,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-15 10:28:48,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:28:48,382 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 14 treesize of output 12 [2023-02-15 10:28:48,537 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 10:28:48,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-15 10:28:48,543 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 8 treesize of output 7 [2023-02-15 10:28:48,553 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 12 treesize of output 11 [2023-02-15 10:28:48,641 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-02-15 10:28:48,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 34 [2023-02-15 10:28:48,645 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 22 treesize of output 16 [2023-02-15 10:28:49,032 INFO L321 Elim1Store]: treesize reduction 23, result has 43.9 percent of original size [2023-02-15 10:28:49,033 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 113 [2023-02-15 10:28:49,065 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 9 treesize of output 7 [2023-02-15 10:28:49,070 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:28:49,081 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 12 treesize of output 11 [2023-02-15 10:28:49,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2023-02-15 10:28:49,250 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_328 (Array Int Int)) (v_ArrVal_327 (Array Int Int)) (v_ArrVal_329 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (<= |chain_node_~node~0#1.base| |chain_node_alloc_node_~ptr~0#1.base|) (= (store (store (store |c_old(#memory_$Pointer$.base)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_327) |chain_node_~node~0#1.base| v_ArrVal_328) |c_chain_node_#in~ppnode#1.base| v_ArrVal_329) |c_#memory_$Pointer$.base|) (< |chain_node_alloc_node_~ptr~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-15 10:28:49,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:28:49,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:28:49,302 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-02-15 10:28:49,303 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 2 case distinctions, treesize of input 32 treesize of output 45 [2023-02-15 10:28:49,314 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 16 treesize of output 12 [2023-02-15 10:28:49,352 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 16 treesize of output 8 [2023-02-15 10:28:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-02-15 10:28:49,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:28:49,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052684369] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:28:49,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:28:49,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2023-02-15 10:28:49,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188794891] [2023-02-15 10:28:49,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:28:49,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 10:28:49,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:28:49,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 10:28:49,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=524, Unknown=11, NotChecked=46, Total=650 [2023-02-15 10:28:49,505 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 25 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 10:28:50,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:28:50,888 INFO L93 Difference]: Finished difference Result 133 states and 165 transitions. [2023-02-15 10:28:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 10:28:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2023-02-15 10:28:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:28:50,892 INFO L225 Difference]: With dead ends: 133 [2023-02-15 10:28:50,892 INFO L226 Difference]: Without dead ends: 130 [2023-02-15 10:28:50,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=152, Invalid=1096, Unknown=16, NotChecked=68, Total=1332 [2023-02-15 10:28:50,894 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 213 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 78 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 10:28:50,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 533 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1227 Invalid, 19 Unknown, 134 Unchecked, 0.9s Time] [2023-02-15 10:28:50,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-15 10:28:50,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2023-02-15 10:28:50,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 86 states have internal predecessors, (97), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 10:28:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2023-02-15 10:28:50,910 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 40 [2023-02-15 10:28:50,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:28:50,910 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2023-02-15 10:28:50,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 10:28:50,911 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2023-02-15 10:28:50,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 10:28:50,912 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:28:50,912 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:28:50,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 10:28:51,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:28:51,119 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:28:51,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:28:51,120 INFO L85 PathProgramCache]: Analyzing trace with hash -727961485, now seen corresponding path program 1 times [2023-02-15 10:28:51,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:28:51,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343565909] [2023-02-15 10:28:51,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:28:51,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:28:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:51,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:28:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:52,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 10:28:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:52,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 10:28:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 10:28:52,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:28:52,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343565909] [2023-02-15 10:28:52,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343565909] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:28:52,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054548056] [2023-02-15 10:28:52,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:28:52,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:28:52,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:28:52,401 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:28:52,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 10:28:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:52,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-15 10:28:52,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:28:52,600 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 [2023-02-15 10:28:52,659 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 10:28:52,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-15 10:28:52,665 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 8 treesize of output 7 [2023-02-15 10:28:52,672 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 12 treesize of output 11 [2023-02-15 10:28:52,731 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-02-15 10:28:52,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 34 [2023-02-15 10:28:52,734 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 22 treesize of output 16 [2023-02-15 10:28:53,003 INFO L321 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2023-02-15 10:28:53,004 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 121 [2023-02-15 10:28:53,017 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 9 treesize of output 7 [2023-02-15 10:28:53,030 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:28:53,044 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 12 treesize of output 11 [2023-02-15 10:28:53,099 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 10:28:53,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 8 [2023-02-15 10:28:53,185 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_645 (Array Int Int)) (v_ArrVal_644 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_alloc_node_~ptr~0#1.base| Int) (v_ArrVal_643 (Array Int Int))) (and (<= (+ 1 |chain_node_alloc_node_~ptr~0#1.base|) |c_#StackHeapBarrier|) (<= |chain_node_~node~0#1.base| |chain_node_alloc_node_~ptr~0#1.base|) (= (store (store (store |c_old(#memory_$Pointer$.base)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_643) |chain_node_~node~0#1.base| v_ArrVal_644) |c_chain_node_#in~ppnode#1.base| v_ArrVal_645) |c_#memory_$Pointer$.base|))) is different from true [2023-02-15 10:28:53,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:28:53,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:28:53,246 INFO L321 Elim1Store]: treesize reduction 43, result has 47.6 percent of original size [2023-02-15 10:28:53,247 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 4 case distinctions, treesize of input 32 treesize of output 57 [2023-02-15 10:28:53,260 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 14 treesize of output 10 [2023-02-15 10:28:53,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-02-15 10:28:53,270 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:28:53,341 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 19 treesize of output 21 [2023-02-15 10:28:53,381 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 12 treesize of output 8 [2023-02-15 10:28:53,479 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_649 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_650 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_649) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_650) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$.base|) (not (= |chain_node_~node~0#1.base| 0)))) is different from true [2023-02-15 10:28:53,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:28:53,533 INFO L321 Elim1Store]: treesize reduction 61, result has 37.1 percent of original size [2023-02-15 10:28:53,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 101 [2023-02-15 10:28:53,541 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 8 treesize of output 7 [2023-02-15 10:28:53,561 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 12 treesize of output 11 [2023-02-15 10:28:53,584 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 40 [2023-02-15 10:28:53,589 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:28:53,601 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-02-15 10:28:53,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 60 [2023-02-15 10:28:53,606 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 55 treesize of output 41 [2023-02-15 10:29:00,379 WARN L233 SmtUtils]: Spent 6.52s on a formula simplification. DAG size of input: 103 DAG size of output: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:29:00,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:29:00,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 658 treesize of output 574 [2023-02-15 10:29:00,667 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:29:00,803 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 5 treesize of output 3 [2023-02-15 10:29:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2023-02-15 10:29:00,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:29:01,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054548056] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:29:01,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:29:01,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 30 [2023-02-15 10:29:01,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727804487] [2023-02-15 10:29:01,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:29:01,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 10:29:01,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:29:01,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 10:29:01,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=724, Unknown=5, NotChecked=110, Total=930 [2023-02-15 10:29:01,116 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand has 30 states, 24 states have (on average 2.25) internal successors, (54), 27 states have internal predecessors, (54), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 10:29:04,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:29:04,394 INFO L93 Difference]: Finished difference Result 132 states and 163 transitions. [2023-02-15 10:29:04,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 10:29:04,395 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 2.25) internal successors, (54), 27 states have internal predecessors, (54), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2023-02-15 10:29:04,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:29:04,397 INFO L225 Difference]: With dead ends: 132 [2023-02-15 10:29:04,397 INFO L226 Difference]: Without dead ends: 129 [2023-02-15 10:29:04,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=190, Invalid=1445, Unknown=13, NotChecked=158, Total=1806 [2023-02-15 10:29:04,399 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 189 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 71 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 290 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-02-15 10:29:04,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 595 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1407 Invalid, 22 Unknown, 290 Unchecked, 2.3s Time] [2023-02-15 10:29:04,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-15 10:29:04,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 100. [2023-02-15 10:29:04,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 86 states have internal predecessors, (96), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 10:29:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2023-02-15 10:29:04,417 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 42 [2023-02-15 10:29:04,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:29:04,418 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2023-02-15 10:29:04,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 2.25) internal successors, (54), 27 states have internal predecessors, (54), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 10:29:04,420 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2023-02-15 10:29:04,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 10:29:04,422 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:29:04,423 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:29:04,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 10:29:04,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-15 10:29:04,630 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:29:04,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:29:04,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1343975071, now seen corresponding path program 1 times [2023-02-15 10:29:04,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:29:04,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107859549] [2023-02-15 10:29:04,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:29:04,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:29:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:06,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:29:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:06,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 10:29:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:07,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 10:29:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 10:29:09,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:29:09,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107859549] [2023-02-15 10:29:09,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107859549] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:29:09,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156732979] [2023-02-15 10:29:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:29:09,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:29:09,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:29:09,201 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:29:09,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 10:29:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:09,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 139 conjunts are in the unsatisfiable core [2023-02-15 10:29:09,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:29:09,395 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 44 treesize of output 42 [2023-02-15 10:29:09,565 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 10:29:09,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-15 10:29:09,588 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 8 treesize of output 7 [2023-02-15 10:29:09,602 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 12 treesize of output 11 [2023-02-15 10:29:09,677 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2023-02-15 10:29:09,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 26 [2023-02-15 10:29:09,682 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 21 treesize of output 15 [2023-02-15 10:29:10,099 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-02-15 10:29:10,099 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 70 [2023-02-15 10:29:10,123 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 9 treesize of output 7 [2023-02-15 10:29:10,210 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 8 treesize of output 4 [2023-02-15 10:29:10,264 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 [2023-02-15 10:29:10,519 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 10:29:10,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-15 10:29:10,528 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 8 treesize of output 7 [2023-02-15 10:29:10,539 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 12 treesize of output 11 [2023-02-15 10:29:10,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 56 [2023-02-15 10:29:10,638 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 51 treesize of output 45 [2023-02-15 10:29:10,668 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:29:10,691 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-15 10:29:10,692 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 29 [2023-02-15 10:29:11,105 INFO L321 Elim1Store]: treesize reduction 86, result has 39.9 percent of original size [2023-02-15 10:29:11,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 193 treesize of output 399 [2023-02-15 10:29:11,124 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 0 case distinctions, treesize of input 68 treesize of output 58 [2023-02-15 10:29:11,334 INFO L321 Elim1Store]: treesize reduction 115, result has 30.3 percent of original size [2023-02-15 10:29:11,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 403 [2023-02-15 10:29:12,206 INFO L321 Elim1Store]: treesize reduction 97, result has 27.6 percent of original size [2023-02-15 10:29:12,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 1410 treesize of output 1988 [2023-02-15 10:29:12,452 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:29:12,495 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:29:12,506 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:29:12,507 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 85 treesize of output 34 [2023-02-15 10:29:12,570 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:29:12,593 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:29:12,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:29:12,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 13 [2023-02-15 10:29:12,966 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:29:13,009 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:29:13,010 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 95 treesize of output 7 [2023-02-15 10:29:13,174 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:29:13,214 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:29:13,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 13 [2023-02-15 10:29:14,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:29:14,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:29:14,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 33 [2023-02-15 10:29:14,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:29:14,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:29:14,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 33 [2023-02-15 10:29:14,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:29:14,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:29:14,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 33 [2023-02-15 10:29:14,498 INFO L321 Elim1Store]: treesize reduction 90, result has 42.3 percent of original size [2023-02-15 10:29:14,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 776 treesize of output 858 [2023-02-15 10:29:15,033 INFO L321 Elim1Store]: treesize reduction 41, result has 2.4 percent of original size [2023-02-15 10:29:15,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 7 [2023-02-15 10:29:15,258 INFO L321 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2023-02-15 10:29:15,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 45 [2023-02-15 10:29:15,280 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-15 10:29:15,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2023-02-15 10:29:15,411 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 10:29:15,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2023-02-15 10:29:15,429 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-02-15 10:29:15,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 23 [2023-02-15 10:29:15,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2023-02-15 10:29:15,727 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_982 (Array Int Int)) (|chain_node_~node~0#1.offset| Int) (v_ArrVal_983 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (let ((.cse0 (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store v_ArrVal_982 |chain_node_~node~0#1.offset| (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_982) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))))) (store .cse0 |c_chain_node_#in~ppnode#1.base| (store (select .cse0 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|))) |c_#memory_$Pointer$.base|) (= (let ((.cse1 (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (store v_ArrVal_983 |chain_node_~node~0#1.offset| (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_983) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))))) (store .cse1 |c_chain_node_#in~ppnode#1.base| (store (select .cse1 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.offset|))) |c_#memory_$Pointer$.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-02-15 10:29:15,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:29:15,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:29:15,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:29:15,839 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-02-15 10:29:15,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 57 [2023-02-15 10:29:15,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:29:15,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:29:15,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:29:15,922 INFO L321 Elim1Store]: treesize reduction 67, result has 25.6 percent of original size [2023-02-15 10:29:15,923 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 82 treesize of output 88 [2023-02-15 10:29:15,938 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 10 treesize of output 9 [2023-02-15 10:29:15,953 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 10 treesize of output 9 [2023-02-15 10:29:15,980 INFO L321 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2023-02-15 10:29:15,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-15 10:29:15,995 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 25 treesize of output 20 [2023-02-15 10:29:16,035 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 0 case distinctions, treesize of input 25 treesize of output 20 [2023-02-15 10:29:16,072 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 0 case distinctions, treesize of input 79 treesize of output 67 [2023-02-15 10:29:16,355 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:29:16,364 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 35 [2023-02-15 10:29:16,914 INFO L321 Elim1Store]: treesize reduction 16, result has 82.8 percent of original size [2023-02-15 10:29:16,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 241 [2023-02-15 10:29:25,061 INFO L321 Elim1Store]: treesize reduction 92, result has 87.1 percent of original size [2023-02-15 10:29:25,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 269 treesize of output 751