./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/heap-manipulation/dancing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/heap-manipulation/dancing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 13:12:37,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 13:12:37,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 13:12:37,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 13:12:37,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 13:12:37,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 13:12:37,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 13:12:37,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 13:12:37,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 13:12:37,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 13:12:37,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 13:12:37,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 13:12:37,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 13:12:37,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 13:12:37,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 13:12:37,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 13:12:37,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 13:12:37,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 13:12:37,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 13:12:37,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 13:12:37,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 13:12:37,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 13:12:37,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 13:12:37,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 13:12:37,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 13:12:37,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 13:12:37,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 13:12:37,146 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 13:12:37,146 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 13:12:37,147 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 13:12:37,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 13:12:37,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 13:12:37,149 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 13:12:37,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 13:12:37,150 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 13:12:37,150 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 13:12:37,151 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 13:12:37,151 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 13:12:37,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 13:12:37,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 13:12:37,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 13:12:37,167 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 13:12:37,185 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 13:12:37,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 13:12:37,186 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 13:12:37,186 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 13:12:37,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 13:12:37,187 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 13:12:37,187 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 13:12:37,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 13:12:37,187 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 13:12:37,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 13:12:37,188 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 13:12:37,189 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 13:12:37,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 13:12:37,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 13:12:37,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 13:12:37,189 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 13:12:37,189 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 13:12:37,190 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 13:12:37,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 13:12:37,190 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 13:12:37,190 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 13:12:37,190 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 13:12:37,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 13:12:37,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 13:12:37,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 13:12:37,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 13:12:37,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 13:12:37,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 13:12:37,192 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 13:12:37,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 13:12:37,192 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 13:12:37,192 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 13:12:37,192 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 13:12:37,193 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 13:12:37,193 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a [2023-02-15 13:12:37,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 13:12:37,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 13:12:37,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 13:12:37,480 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 13:12:37,480 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 13:12:37,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/dancing.i [2023-02-15 13:12:38,559 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 13:12:38,805 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 13:12:38,809 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/dancing.i [2023-02-15 13:12:38,825 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/604d73846/4631623d5a974d2e89a5ca106429a1e3/FLAG3fc7f6cb3 [2023-02-15 13:12:38,839 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/604d73846/4631623d5a974d2e89a5ca106429a1e3 [2023-02-15 13:12:38,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 13:12:38,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 13:12:38,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 13:12:38,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 13:12:38,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 13:12:38,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:12:38" (1/1) ... [2023-02-15 13:12:38,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@466bac0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:38, skipping insertion in model container [2023-02-15 13:12:38,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:12:38" (1/1) ... [2023-02-15 13:12:38,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 13:12:38,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 13:12:38,997 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/dancing.i[938,951] [2023-02-15 13:12:39,109 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 13:12:39,121 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 13:12:39,140 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/dancing.i[938,951] [2023-02-15 13:12:39,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 13:12:39,209 INFO L208 MainTranslator]: Completed translation [2023-02-15 13:12:39,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:39 WrapperNode [2023-02-15 13:12:39,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 13:12:39,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 13:12:39,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 13:12:39,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 13:12:39,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:39" (1/1) ... [2023-02-15 13:12:39,228 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:39" (1/1) ... [2023-02-15 13:12:39,245 INFO L138 Inliner]: procedures = 124, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 90 [2023-02-15 13:12:39,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 13:12:39,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 13:12:39,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 13:12:39,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 13:12:39,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:39" (1/1) ... [2023-02-15 13:12:39,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:39" (1/1) ... [2023-02-15 13:12:39,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:39" (1/1) ... [2023-02-15 13:12:39,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:39" (1/1) ... [2023-02-15 13:12:39,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:39" (1/1) ... [2023-02-15 13:12:39,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:39" (1/1) ... [2023-02-15 13:12:39,273 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:39" (1/1) ... [2023-02-15 13:12:39,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:39" (1/1) ... [2023-02-15 13:12:39,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 13:12:39,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 13:12:39,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 13:12:39,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 13:12:39,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:39" (1/1) ... [2023-02-15 13:12:39,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 13:12:39,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:12:39,313 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 13:12:39,333 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 13:12:39,351 INFO L130 BoogieDeclarations]: Found specification of procedure is_list_containing_x [2023-02-15 13:12:39,351 INFO L138 BoogieDeclarations]: Found implementation of procedure is_list_containing_x [2023-02-15 13:12:39,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 13:12:39,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 13:12:39,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 13:12:39,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 13:12:39,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 13:12:39,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 13:12:39,352 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 13:12:39,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 13:12:39,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 13:12:39,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 13:12:39,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 13:12:39,485 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 13:12:39,486 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 13:12:39,852 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 13:12:39,858 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 13:12:39,859 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 13:12:39,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:12:39 BoogieIcfgContainer [2023-02-15 13:12:39,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 13:12:39,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 13:12:39,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 13:12:39,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 13:12:39,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:12:38" (1/3) ... [2023-02-15 13:12:39,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d876df1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:12:39, skipping insertion in model container [2023-02-15 13:12:39,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:39" (2/3) ... [2023-02-15 13:12:39,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d876df1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:12:39, skipping insertion in model container [2023-02-15 13:12:39,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:12:39" (3/3) ... [2023-02-15 13:12:39,867 INFO L112 eAbstractionObserver]: Analyzing ICFG dancing.i [2023-02-15 13:12:39,883 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 13:12:39,883 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-02-15 13:12:39,920 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 13:12:39,925 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6f7939dc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 13:12:39,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2023-02-15 13:12:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 55 states have (on average 2.036363636363636) internal successors, (112), 99 states have internal predecessors, (112), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 13:12:39,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-15 13:12:39,933 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:39,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-15 13:12:39,935 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:39,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:39,939 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2023-02-15 13:12:39,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:39,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34196796] [2023-02-15 13:12:39,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:39,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:40,164 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 13:12:40,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:40,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34196796] [2023-02-15 13:12:40,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34196796] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:40,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:40,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:12:40,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789864781] [2023-02-15 13:12:40,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:40,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:12:40,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:40,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:12:40,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:40,214 INFO L87 Difference]: Start difference. First operand has 108 states, 55 states have (on average 2.036363636363636) internal successors, (112), 99 states have internal predecessors, (112), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:40,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:40,359 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2023-02-15 13:12:40,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:12:40,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-02-15 13:12:40,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:40,369 INFO L225 Difference]: With dead ends: 106 [2023-02-15 13:12:40,369 INFO L226 Difference]: Without dead ends: 104 [2023-02-15 13:12:40,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:40,374 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 82 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:40,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 94 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:12:40,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-15 13:12:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-02-15 13:12:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 95 states have internal predecessors, (105), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 13:12:40,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2023-02-15 13:12:40,419 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 3 [2023-02-15 13:12:40,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:40,419 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2023-02-15 13:12:40,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:40,420 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2023-02-15 13:12:40,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-15 13:12:40,420 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:40,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-15 13:12:40,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 13:12:40,421 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:40,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:40,422 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2023-02-15 13:12:40,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:40,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713898302] [2023-02-15 13:12:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:40,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:40,559 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 13:12:40,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:40,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713898302] [2023-02-15 13:12:40,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713898302] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:40,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:40,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:12:40,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157616241] [2023-02-15 13:12:40,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:40,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:12:40,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:40,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:12:40,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:40,564 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:40,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:40,671 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2023-02-15 13:12:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:12:40,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-02-15 13:12:40,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:40,673 INFO L225 Difference]: With dead ends: 102 [2023-02-15 13:12:40,673 INFO L226 Difference]: Without dead ends: 102 [2023-02-15 13:12:40,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:40,674 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 80 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:40,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 92 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:12:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-15 13:12:40,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-02-15 13:12:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 93 states have internal predecessors, (103), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 13:12:40,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2023-02-15 13:12:40,686 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 3 [2023-02-15 13:12:40,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:40,686 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2023-02-15 13:12:40,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:40,687 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2023-02-15 13:12:40,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 13:12:40,687 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:40,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:40,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 13:12:40,688 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:40,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:40,689 INFO L85 PathProgramCache]: Analyzing trace with hash 59267633, now seen corresponding path program 1 times [2023-02-15 13:12:40,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:40,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373827252] [2023-02-15 13:12:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:40,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:40,794 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 13:12:40,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:40,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373827252] [2023-02-15 13:12:40,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373827252] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:40,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:40,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:12:40,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016206307] [2023-02-15 13:12:40,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:40,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:12:40,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:40,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:12:40,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:40,797 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:40,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:40,920 INFO L93 Difference]: Finished difference Result 165 states and 189 transitions. [2023-02-15 13:12:40,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:12:40,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 13:12:40,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:40,922 INFO L225 Difference]: With dead ends: 165 [2023-02-15 13:12:40,922 INFO L226 Difference]: Without dead ends: 165 [2023-02-15 13:12:40,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:40,924 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 74 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:40,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 213 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:12:40,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-15 13:12:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 100. [2023-02-15 13:12:40,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 91 states have internal predecessors, (101), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 13:12:40,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2023-02-15 13:12:40,934 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 8 [2023-02-15 13:12:40,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:40,934 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2023-02-15 13:12:40,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:40,934 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2023-02-15 13:12:40,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 13:12:40,935 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:40,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:40,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 13:12:40,936 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:40,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:40,936 INFO L85 PathProgramCache]: Analyzing trace with hash 59267634, now seen corresponding path program 1 times [2023-02-15 13:12:40,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:40,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883244544] [2023-02-15 13:12:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:40,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:41,018 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 13:12:41,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:41,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883244544] [2023-02-15 13:12:41,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883244544] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:41,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:41,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:12:41,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634638482] [2023-02-15 13:12:41,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:41,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:12:41,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:41,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:12:41,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:41,022 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:41,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:41,124 INFO L93 Difference]: Finished difference Result 165 states and 188 transitions. [2023-02-15 13:12:41,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:12:41,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 13:12:41,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:41,128 INFO L225 Difference]: With dead ends: 165 [2023-02-15 13:12:41,129 INFO L226 Difference]: Without dead ends: 165 [2023-02-15 13:12:41,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:41,138 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 74 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:41,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 217 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:12:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-15 13:12:41,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 98. [2023-02-15 13:12:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 54 states have (on average 1.8333333333333333) internal successors, (99), 89 states have internal predecessors, (99), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 13:12:41,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2023-02-15 13:12:41,155 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 8 [2023-02-15 13:12:41,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:41,156 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2023-02-15 13:12:41,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:41,156 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2023-02-15 13:12:41,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 13:12:41,157 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:41,157 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:41,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 13:12:41,157 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:41,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:41,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1124238034, now seen corresponding path program 1 times [2023-02-15 13:12:41,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:41,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448012935] [2023-02-15 13:12:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:41,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:41,240 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 13:12:41,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:41,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448012935] [2023-02-15 13:12:41,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448012935] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:41,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:41,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:12:41,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978857337] [2023-02-15 13:12:41,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:41,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:12:41,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:41,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:12:41,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:12:41,243 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:41,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:41,305 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2023-02-15 13:12:41,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:12:41,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 13:12:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:41,308 INFO L225 Difference]: With dead ends: 176 [2023-02-15 13:12:41,308 INFO L226 Difference]: Without dead ends: 176 [2023-02-15 13:12:41,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:12:41,309 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 78 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:41,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 403 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:12:41,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-02-15 13:12:41,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 142. [2023-02-15 13:12:41,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 93 states have (on average 1.89247311827957) internal successors, (176), 129 states have internal predecessors, (176), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 13:12:41,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 196 transitions. [2023-02-15 13:12:41,320 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 196 transitions. Word has length 10 [2023-02-15 13:12:41,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:41,320 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 196 transitions. [2023-02-15 13:12:41,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:41,321 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 196 transitions. [2023-02-15 13:12:41,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 13:12:41,321 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:41,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:41,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 13:12:41,322 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:41,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:41,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1121620373, now seen corresponding path program 1 times [2023-02-15 13:12:41,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:41,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870722899] [2023-02-15 13:12:41,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:41,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:41,512 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 13:12:41,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:41,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870722899] [2023-02-15 13:12:41,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870722899] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:41,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:41,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:12:41,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269374949] [2023-02-15 13:12:41,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:41,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:12:41,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:41,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:12:41,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:12:41,515 INFO L87 Difference]: Start difference. First operand 142 states and 196 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:41,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:41,628 INFO L93 Difference]: Finished difference Result 140 states and 192 transitions. [2023-02-15 13:12:41,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 13:12:41,629 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 13:12:41,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:41,630 INFO L225 Difference]: With dead ends: 140 [2023-02-15 13:12:41,631 INFO L226 Difference]: Without dead ends: 140 [2023-02-15 13:12:41,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:12:41,633 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 217 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:41,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 105 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:12:41,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-15 13:12:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2023-02-15 13:12:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 93 states have (on average 1.8494623655913978) internal successors, (172), 127 states have internal predecessors, (172), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 13:12:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 192 transitions. [2023-02-15 13:12:41,653 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 192 transitions. Word has length 10 [2023-02-15 13:12:41,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:41,654 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 192 transitions. [2023-02-15 13:12:41,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:41,654 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 192 transitions. [2023-02-15 13:12:41,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 13:12:41,655 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:41,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:41,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 13:12:41,655 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1910990355, now seen corresponding path program 1 times [2023-02-15 13:12:41,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:41,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090443653] [2023-02-15 13:12:41,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:41,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:41,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 13:12:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:41,751 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 13:12:41,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:41,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090443653] [2023-02-15 13:12:41,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090443653] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:41,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:41,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:12:41,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095799296] [2023-02-15 13:12:41,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:41,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:12:41,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:41,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:12:41,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:12:41,754 INFO L87 Difference]: Start difference. First operand 140 states and 192 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 13:12:41,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:41,937 INFO L93 Difference]: Finished difference Result 159 states and 184 transitions. [2023-02-15 13:12:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:12:41,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-15 13:12:41,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:41,939 INFO L225 Difference]: With dead ends: 159 [2023-02-15 13:12:41,939 INFO L226 Difference]: Without dead ends: 159 [2023-02-15 13:12:41,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:12:41,941 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 235 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:41,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 203 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:12:41,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-15 13:12:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2023-02-15 13:12:41,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 93 states have (on average 1.7311827956989247) internal successors, (161), 122 states have internal predecessors, (161), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 13:12:41,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 181 transitions. [2023-02-15 13:12:41,954 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 181 transitions. Word has length 15 [2023-02-15 13:12:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:41,955 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 181 transitions. [2023-02-15 13:12:41,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 13:12:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 181 transitions. [2023-02-15 13:12:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 13:12:41,956 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:41,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:41,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 13:12:41,957 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:41,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:41,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1910990356, now seen corresponding path program 1 times [2023-02-15 13:12:41,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:41,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953627728] [2023-02-15 13:12:41,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:41,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:42,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 13:12:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:42,094 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 13:12:42,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:42,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953627728] [2023-02-15 13:12:42,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953627728] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:42,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:42,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:12:42,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387017796] [2023-02-15 13:12:42,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:42,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:12:42,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:42,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:12:42,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:12:42,098 INFO L87 Difference]: Start difference. First operand 135 states and 181 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 13:12:42,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:42,279 INFO L93 Difference]: Finished difference Result 155 states and 179 transitions. [2023-02-15 13:12:42,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:12:42,280 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-15 13:12:42,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:42,281 INFO L225 Difference]: With dead ends: 155 [2023-02-15 13:12:42,281 INFO L226 Difference]: Without dead ends: 155 [2023-02-15 13:12:42,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 13:12:42,282 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 289 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:42,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 186 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:12:42,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-02-15 13:12:42,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 135. [2023-02-15 13:12:42,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 93 states have (on average 1.6666666666666667) internal successors, (155), 122 states have internal predecessors, (155), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 13:12:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 175 transitions. [2023-02-15 13:12:42,287 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 175 transitions. Word has length 15 [2023-02-15 13:12:42,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:42,287 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 175 transitions. [2023-02-15 13:12:42,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 13:12:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 175 transitions. [2023-02-15 13:12:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 13:12:42,288 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:42,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:42,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 13:12:42,288 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:42,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1007148901, now seen corresponding path program 1 times [2023-02-15 13:12:42,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:42,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507428954] [2023-02-15 13:12:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:42,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:42,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:42,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507428954] [2023-02-15 13:12:42,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507428954] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:12:42,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894118796] [2023-02-15 13:12:42,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:42,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:12:42,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:12:42,377 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 13:12:42,378 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 13:12:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:42,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 13:12:42,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:12:42,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 13:12:42,597 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 13:12:42,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-02-15 13:12:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:42,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:12:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:42,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894118796] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:12:42,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:12:42,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 14 [2023-02-15 13:12:42,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950237903] [2023-02-15 13:12:42,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:12:42,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 13:12:42,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:42,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 13:12:42,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-02-15 13:12:42,911 INFO L87 Difference]: Start difference. First operand 135 states and 175 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:43,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:43,363 INFO L93 Difference]: Finished difference Result 200 states and 254 transitions. [2023-02-15 13:12:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 13:12:43,363 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 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 13:12:43,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:43,364 INFO L225 Difference]: With dead ends: 200 [2023-02-15 13:12:43,364 INFO L226 Difference]: Without dead ends: 200 [2023-02-15 13:12:43,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-02-15 13:12:43,365 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 354 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:43,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 447 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:12:43,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-15 13:12:43,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2023-02-15 13:12:43,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 100 states have (on average 1.65) internal successors, (165), 128 states have internal predecessors, (165), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 13:12:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2023-02-15 13:12:43,376 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 16 [2023-02-15 13:12:43,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:43,377 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2023-02-15 13:12:43,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:43,377 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2023-02-15 13:12:43,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 13:12:43,378 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:43,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:43,386 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 13:12:43,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:12:43,589 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:43,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:43,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1007148902, now seen corresponding path program 1 times [2023-02-15 13:12:43,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:43,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306046691] [2023-02-15 13:12:43,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:43,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:43,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:43,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306046691] [2023-02-15 13:12:43,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306046691] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:12:43,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082759613] [2023-02-15 13:12:43,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:43,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:12:43,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:12:43,724 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 13:12:43,727 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 13:12:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:43,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 13:12:43,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:12:43,838 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 13:12:43,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-02-15 13:12:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:43,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:12:44,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2023-02-15 13:12:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:44,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082759613] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:12:44,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:12:44,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 15 [2023-02-15 13:12:44,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781471469] [2023-02-15 13:12:44,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:12:44,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 13:12:44,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:44,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 13:12:44,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-02-15 13:12:44,205 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:44,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:44,732 INFO L93 Difference]: Finished difference Result 197 states and 251 transitions. [2023-02-15 13:12:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 13:12:44,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 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 13:12:44,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:44,734 INFO L225 Difference]: With dead ends: 197 [2023-02-15 13:12:44,734 INFO L226 Difference]: Without dead ends: 197 [2023-02-15 13:12:44,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-02-15 13:12:44,735 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 484 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:44,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 497 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 13:12:44,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-02-15 13:12:44,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 142. [2023-02-15 13:12:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 100 states have (on average 1.62) internal successors, (162), 127 states have internal predecessors, (162), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 13:12:44,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 184 transitions. [2023-02-15 13:12:44,740 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 184 transitions. Word has length 16 [2023-02-15 13:12:44,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:44,741 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 184 transitions. [2023-02-15 13:12:44,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:44,745 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 184 transitions. [2023-02-15 13:12:44,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 13:12:44,748 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:44,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:44,757 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 13:12:44,954 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,SelfDestructingSolverStorable9 [2023-02-15 13:12:44,954 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:44,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:44,954 INFO L85 PathProgramCache]: Analyzing trace with hash -992190633, now seen corresponding path program 1 times [2023-02-15 13:12:44,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:44,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207593983] [2023-02-15 13:12:44,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:44,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:45,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 13:12:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:45,202 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 13:12:45,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:45,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207593983] [2023-02-15 13:12:45,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207593983] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:45,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:45,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 13:12:45,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696571856] [2023-02-15 13:12:45,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:45,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 13:12:45,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:45,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 13:12:45,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:12:45,204 INFO L87 Difference]: Start difference. First operand 142 states and 184 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 13:12:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:45,376 INFO L93 Difference]: Finished difference Result 190 states and 242 transitions. [2023-02-15 13:12:45,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 13:12:45,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-02-15 13:12:45,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:45,378 INFO L225 Difference]: With dead ends: 190 [2023-02-15 13:12:45,378 INFO L226 Difference]: Without dead ends: 190 [2023-02-15 13:12:45,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-02-15 13:12:45,379 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 192 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:45,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 395 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:12:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-02-15 13:12:45,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 150. [2023-02-15 13:12:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 107 states have (on average 1.5981308411214954) internal successors, (171), 134 states have internal predecessors, (171), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-15 13:12:45,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 195 transitions. [2023-02-15 13:12:45,387 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 195 transitions. Word has length 19 [2023-02-15 13:12:45,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:45,388 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 195 transitions. [2023-02-15 13:12:45,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 13:12:45,388 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 195 transitions. [2023-02-15 13:12:45,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 13:12:45,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:45,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:45,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-15 13:12:45,391 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:45,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:45,392 INFO L85 PathProgramCache]: Analyzing trace with hash 343557913, now seen corresponding path program 1 times [2023-02-15 13:12:45,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:45,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320694699] [2023-02-15 13:12:45,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:45,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:45,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 13:12:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:45,558 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 13:12:45,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:45,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320694699] [2023-02-15 13:12:45,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320694699] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:45,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:45,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 13:12:45,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695324657] [2023-02-15 13:12:45,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:45,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 13:12:45,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:45,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 13:12:45,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:12:45,561 INFO L87 Difference]: Start difference. First operand 150 states and 195 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 13:12:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:45,702 INFO L93 Difference]: Finished difference Result 185 states and 236 transitions. [2023-02-15 13:12:45,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 13:12:45,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-02-15 13:12:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:45,704 INFO L225 Difference]: With dead ends: 185 [2023-02-15 13:12:45,704 INFO L226 Difference]: Without dead ends: 185 [2023-02-15 13:12:45,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 13:12:45,705 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 138 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:45,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 397 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:12:45,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-15 13:12:45,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 152. [2023-02-15 13:12:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 109 states have (on average 1.5871559633027523) internal successors, (173), 136 states have internal predecessors, (173), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-15 13:12:45,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 197 transitions. [2023-02-15 13:12:45,709 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 197 transitions. Word has length 21 [2023-02-15 13:12:45,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:45,710 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 197 transitions. [2023-02-15 13:12:45,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 13:12:45,710 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 197 transitions. [2023-02-15 13:12:45,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 13:12:45,710 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:45,711 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:45,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-15 13:12:45,711 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:45,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:45,711 INFO L85 PathProgramCache]: Analyzing trace with hash 451808416, now seen corresponding path program 1 times [2023-02-15 13:12:45,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:45,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613481233] [2023-02-15 13:12:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:45,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:46,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:46,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613481233] [2023-02-15 13:12:46,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613481233] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:12:46,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283060939] [2023-02-15 13:12:46,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:46,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:12:46,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:12:46,033 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 13:12:46,035 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 13:12:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:46,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 13:12:46,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:12:46,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 13:12:46,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:12:46,229 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 21 treesize of output 9 [2023-02-15 13:12:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:46,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:12:46,317 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 34 treesize of output 28 [2023-02-15 13:12:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:46,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283060939] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:12:46,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:12:46,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 20 [2023-02-15 13:12:46,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772819655] [2023-02-15 13:12:46,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:12:46,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 13:12:46,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:46,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 13:12:46,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2023-02-15 13:12:46,395 INFO L87 Difference]: Start difference. First operand 152 states and 197 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:47,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:47,836 INFO L93 Difference]: Finished difference Result 499 states and 655 transitions. [2023-02-15 13:12:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 13:12:47,837 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-15 13:12:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:47,841 INFO L225 Difference]: With dead ends: 499 [2023-02-15 13:12:47,842 INFO L226 Difference]: Without dead ends: 499 [2023-02-15 13:12:47,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 13:12:47,844 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 985 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:47,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 1487 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 1699 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-15 13:12:47,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-02-15 13:12:47,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 237. [2023-02-15 13:12:47,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 176 states have (on average 1.5795454545454546) internal successors, (278), 206 states have internal predecessors, (278), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-15 13:12:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 328 transitions. [2023-02-15 13:12:47,855 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 328 transitions. Word has length 22 [2023-02-15 13:12:47,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:47,855 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 328 transitions. [2023-02-15 13:12:47,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:47,855 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 328 transitions. [2023-02-15 13:12:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 13:12:47,856 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:47,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:47,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 13:12:48,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:12:48,061 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:48,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:48,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1286860128, now seen corresponding path program 1 times [2023-02-15 13:12:48,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:48,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565127100] [2023-02-15 13:12:48,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:48,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:48,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:12:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:48,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:48,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565127100] [2023-02-15 13:12:48,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565127100] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:12:48,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185822064] [2023-02-15 13:12:48,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:48,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:12:48,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:12:48,157 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:12:48,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 13:12:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:48,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 13:12:48,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:12:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:48,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:12:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:48,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185822064] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:12:48,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:12:48,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-02-15 13:12:48,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303633984] [2023-02-15 13:12:48,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:12:48,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 13:12:48,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:48,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 13:12:48,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-02-15 13:12:48,446 INFO L87 Difference]: Start difference. First operand 237 states and 328 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 13:12:48,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:48,901 INFO L93 Difference]: Finished difference Result 305 states and 388 transitions. [2023-02-15 13:12:48,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 13:12:48,902 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2023-02-15 13:12:48,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:48,903 INFO L225 Difference]: With dead ends: 305 [2023-02-15 13:12:48,903 INFO L226 Difference]: Without dead ends: 299 [2023-02-15 13:12:48,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-02-15 13:12:48,904 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 354 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:48,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 739 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 13:12:48,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-02-15 13:12:48,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 237. [2023-02-15 13:12:48,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 176 states have (on average 1.5625) internal successors, (275), 206 states have internal predecessors, (275), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-15 13:12:48,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 325 transitions. [2023-02-15 13:12:48,911 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 325 transitions. Word has length 21 [2023-02-15 13:12:48,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:48,911 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 325 transitions. [2023-02-15 13:12:48,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 13:12:48,912 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 325 transitions. [2023-02-15 13:12:48,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 13:12:48,912 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:48,912 INFO L195 NwaCegarLoop]: trace histogram [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 13:12:48,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 13:12:49,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:12:49,113 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:49,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:49,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1821114983, now seen corresponding path program 1 times [2023-02-15 13:12:49,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:49,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097761681] [2023-02-15 13:12:49,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:49,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:49,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 13:12:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:49,187 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 13:12:49,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:49,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097761681] [2023-02-15 13:12:49,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097761681] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:49,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:49,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:12:49,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841081136] [2023-02-15 13:12:49,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:49,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:12:49,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:49,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:12:49,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:12:49,189 INFO L87 Difference]: Start difference. First operand 237 states and 325 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 13:12:49,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:49,209 INFO L93 Difference]: Finished difference Result 251 states and 343 transitions. [2023-02-15 13:12:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:12:49,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-02-15 13:12:49,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:49,211 INFO L225 Difference]: With dead ends: 251 [2023-02-15 13:12:49,211 INFO L226 Difference]: Without dead ends: 251 [2023-02-15 13:12:49,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:12:49,212 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 6 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:49,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 389 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:12:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-02-15 13:12:49,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 246. [2023-02-15 13:12:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 179 states have (on average 1.553072625698324) internal successors, (278), 214 states have internal predecessors, (278), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 21 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-15 13:12:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 338 transitions. [2023-02-15 13:12:49,219 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 338 transitions. Word has length 24 [2023-02-15 13:12:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:49,219 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 338 transitions. [2023-02-15 13:12:49,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 13:12:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 338 transitions. [2023-02-15 13:12:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 13:12:49,220 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:49,220 INFO L195 NwaCegarLoop]: trace histogram [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 13:12:49,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-15 13:12:49,221 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:49,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:49,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1983275188, now seen corresponding path program 1 times [2023-02-15 13:12:49,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:49,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261700526] [2023-02-15 13:12:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:49,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:49,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:12:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:49,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:49,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261700526] [2023-02-15 13:12:49,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261700526] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:49,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:49,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:12:49,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854709487] [2023-02-15 13:12:49,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:49,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:12:49,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:49,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:12:49,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:12:49,279 INFO L87 Difference]: Start difference. First operand 246 states and 338 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 13:12:49,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:49,468 INFO L93 Difference]: Finished difference Result 304 states and 389 transitions. [2023-02-15 13:12:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 13:12:49,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-02-15 13:12:49,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:49,476 INFO L225 Difference]: With dead ends: 304 [2023-02-15 13:12:49,476 INFO L226 Difference]: Without dead ends: 304 [2023-02-15 13:12:49,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:12:49,478 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 206 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:49,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 254 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:12:49,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-02-15 13:12:49,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 245. [2023-02-15 13:12:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 179 states have (on average 1.541899441340782) internal successors, (276), 213 states have internal predecessors, (276), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 21 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-15 13:12:49,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 336 transitions. [2023-02-15 13:12:49,494 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 336 transitions. Word has length 23 [2023-02-15 13:12:49,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:49,494 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 336 transitions. [2023-02-15 13:12:49,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 13:12:49,494 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 336 transitions. [2023-02-15 13:12:49,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 13:12:49,497 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:49,497 INFO L195 NwaCegarLoop]: trace histogram [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 13:12:49,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-15 13:12:49,497 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:49,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:49,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1983275187, now seen corresponding path program 1 times [2023-02-15 13:12:49,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:49,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6867046] [2023-02-15 13:12:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:49,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:49,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:12:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:49,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:49,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6867046] [2023-02-15 13:12:49,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6867046] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:49,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:49,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:12:49,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112285728] [2023-02-15 13:12:49,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:49,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:12:49,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:49,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:12:49,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:12:49,615 INFO L87 Difference]: Start difference. First operand 245 states and 336 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 13:12:49,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:49,810 INFO L93 Difference]: Finished difference Result 302 states and 382 transitions. [2023-02-15 13:12:49,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 13:12:49,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-02-15 13:12:49,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:49,811 INFO L225 Difference]: With dead ends: 302 [2023-02-15 13:12:49,811 INFO L226 Difference]: Without dead ends: 302 [2023-02-15 13:12:49,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:12:49,812 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 194 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:49,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 347 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:12:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-02-15 13:12:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 239. [2023-02-15 13:12:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 179 states have (on average 1.4916201117318435) internal successors, (267), 207 states have internal predecessors, (267), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 21 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-15 13:12:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 327 transitions. [2023-02-15 13:12:49,818 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 327 transitions. Word has length 23 [2023-02-15 13:12:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:49,818 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 327 transitions. [2023-02-15 13:12:49,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 13:12:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 327 transitions. [2023-02-15 13:12:49,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 13:12:49,819 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:49,819 INFO L195 NwaCegarLoop]: trace histogram [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 13:12:49,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-15 13:12:49,819 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:12:49,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:49,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2147398490, now seen corresponding path program 1 times [2023-02-15 13:12:49,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:49,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776911673] [2023-02-15 13:12:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:49,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:50,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:12:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:50,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:50,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776911673] [2023-02-15 13:12:50,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776911673] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:12:50,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215640616] [2023-02-15 13:12:50,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:50,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:12:50,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:12:50,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:12:50,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 13:12:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:50,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 13:12:50,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:12:50,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 13:12:50,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:12:50,719 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 21 treesize of output 9 [2023-02-15 13:12:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:50,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:12:50,745 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 34 treesize of output 28 [2023-02-15 13:12:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:50,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215640616] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:12:50,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:12:50,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 6] total 21 [2023-02-15 13:12:50,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053115687] [2023-02-15 13:12:50,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:12:50,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 13:12:50,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:50,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 13:12:50,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2023-02-15 13:12:50,825 INFO L87 Difference]: Start difference. First operand 239 states and 327 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 13:12:54,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:12:56,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:12:58,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:13:00,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:13:02,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:13:04,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:13:06,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:13:08,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:13:10,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:13:12,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:13:14,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:13:14,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:14,986 INFO L93 Difference]: Finished difference Result 451 states and 549 transitions. [2023-02-15 13:13:14,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 13:13:14,986 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-02-15 13:13:14,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:14,988 INFO L225 Difference]: With dead ends: 451 [2023-02-15 13:13:14,988 INFO L226 Difference]: Without dead ends: 451 [2023-02-15 13:13:14,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=301, Invalid=1031, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 13:13:14,989 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 1529 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 284 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1534 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.4s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:14,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1534 Valid, 1245 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1495 Invalid, 11 Unknown, 0 Unchecked, 23.4s Time] [2023-02-15 13:13:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2023-02-15 13:13:14,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 309. [2023-02-15 13:13:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 232 states have (on average 1.4612068965517242) internal successors, (339), 264 states have internal predecessors, (339), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 29 states have call predecessors, (42), 42 states have call successors, (42) [2023-02-15 13:13:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 423 transitions. [2023-02-15 13:13:14,999 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 423 transitions. Word has length 25 [2023-02-15 13:13:14,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:14,999 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 423 transitions. [2023-02-15 13:13:14,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 13:13:14,999 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 423 transitions. [2023-02-15 13:13:15,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 13:13:15,000 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:15,000 INFO L195 NwaCegarLoop]: trace histogram [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 13:13:15,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 13:13:15,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 13:13:15,206 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:13:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:15,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2147398489, now seen corresponding path program 1 times [2023-02-15 13:13:15,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:15,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243246317] [2023-02-15 13:13:15,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:15,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:15,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:13:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:15,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:15,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243246317] [2023-02-15 13:13:15,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243246317] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:13:15,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270382778] [2023-02-15 13:13:15,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:15,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:13:15,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:13:15,945 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:13:15,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 13:13:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:16,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 13:13:16,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:13:16,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:13:16,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:13:16,269 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 21 treesize of output 9 [2023-02-15 13:13:16,272 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 19 treesize of output 7 [2023-02-15 13:13:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:16,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:13:16,409 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 70 treesize of output 64 [2023-02-15 13:13:16,411 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 94 treesize of output 82 [2023-02-15 13:13:16,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:13:16,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:13:16,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2023-02-15 13:13:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:16,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270382778] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:13:16,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:13:16,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 26 [2023-02-15 13:13:16,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715367720] [2023-02-15 13:13:16,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:13:16,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 13:13:16,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:16,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 13:13:16,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2023-02-15 13:13:16,566 INFO L87 Difference]: Start difference. First operand 309 states and 423 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 13:13:19,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:19,268 INFO L93 Difference]: Finished difference Result 501 states and 601 transitions. [2023-02-15 13:13:19,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 13:13:19,269 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-02-15 13:13:19,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:19,271 INFO L225 Difference]: With dead ends: 501 [2023-02-15 13:13:19,271 INFO L226 Difference]: Without dead ends: 501 [2023-02-15 13:13:19,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=436, Invalid=1634, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 13:13:19,272 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 1030 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 2645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 2441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:19,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 1445 Invalid, 2645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 2441 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-15 13:13:19,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2023-02-15 13:13:19,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 335. [2023-02-15 13:13:19,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 250 states have (on average 1.456) internal successors, (364), 284 states have internal predecessors, (364), 47 states have call successors, (47), 18 states have call predecessors, (47), 18 states have return successors, (47), 32 states have call predecessors, (47), 47 states have call successors, (47) [2023-02-15 13:13:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 458 transitions. [2023-02-15 13:13:19,282 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 458 transitions. Word has length 25 [2023-02-15 13:13:19,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:19,282 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 458 transitions. [2023-02-15 13:13:19,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 13:13:19,282 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 458 transitions. [2023-02-15 13:13:19,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 13:13:19,283 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:19,283 INFO L195 NwaCegarLoop]: trace histogram [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 13:13:19,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 13:13:19,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:13:19,489 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:13:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:19,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1195361463, now seen corresponding path program 1 times [2023-02-15 13:13:19,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:19,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761678166] [2023-02-15 13:13:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:19,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:19,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 13:13:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:19,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 13:13:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:19,546 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 13:13:19,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:19,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761678166] [2023-02-15 13:13:19,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761678166] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:13:19,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:13:19,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:13:19,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229746169] [2023-02-15 13:13:19,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:13:19,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:13:19,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:19,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:13:19,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:13:19,548 INFO L87 Difference]: Start difference. First operand 335 states and 458 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:19,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:19,681 INFO L93 Difference]: Finished difference Result 345 states and 447 transitions. [2023-02-15 13:13:19,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:13:19,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-02-15 13:13:19,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:19,683 INFO L225 Difference]: With dead ends: 345 [2023-02-15 13:13:19,683 INFO L226 Difference]: Without dead ends: 345 [2023-02-15 13:13:19,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:13:19,684 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 227 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:19,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 153 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:13:19,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2023-02-15 13:13:19,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 332. [2023-02-15 13:13:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 250 states have (on average 1.392) internal successors, (348), 281 states have internal predecessors, (348), 47 states have call successors, (47), 18 states have call predecessors, (47), 18 states have return successors, (47), 32 states have call predecessors, (47), 47 states have call successors, (47) [2023-02-15 13:13:19,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 442 transitions. [2023-02-15 13:13:19,696 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 442 transitions. Word has length 27 [2023-02-15 13:13:19,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:19,696 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 442 transitions. [2023-02-15 13:13:19,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:19,697 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 442 transitions. [2023-02-15 13:13:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 13:13:19,697 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:19,697 INFO L195 NwaCegarLoop]: trace histogram [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 13:13:19,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-15 13:13:19,698 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:13:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:19,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1195361464, now seen corresponding path program 1 times [2023-02-15 13:13:19,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:19,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526428972] [2023-02-15 13:13:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:19,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:19,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 13:13:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:19,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 13:13:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:19,817 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 13:13:19,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:19,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526428972] [2023-02-15 13:13:19,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526428972] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:13:19,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:13:19,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:13:19,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646624849] [2023-02-15 13:13:19,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:13:19,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:13:19,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:19,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:13:19,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:13:19,819 INFO L87 Difference]: Start difference. First operand 332 states and 442 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:19,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:19,994 INFO L93 Difference]: Finished difference Result 343 states and 438 transitions. [2023-02-15 13:13:19,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:13:19,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-02-15 13:13:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:19,996 INFO L225 Difference]: With dead ends: 343 [2023-02-15 13:13:19,996 INFO L226 Difference]: Without dead ends: 343 [2023-02-15 13:13:19,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 13:13:19,996 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 167 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:19,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 209 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:13:19,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-02-15 13:13:20,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 332. [2023-02-15 13:13:20,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 250 states have (on average 1.352) internal successors, (338), 281 states have internal predecessors, (338), 47 states have call successors, (47), 18 states have call predecessors, (47), 18 states have return successors, (47), 32 states have call predecessors, (47), 47 states have call successors, (47) [2023-02-15 13:13:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 432 transitions. [2023-02-15 13:13:20,007 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 432 transitions. Word has length 27 [2023-02-15 13:13:20,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:20,007 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 432 transitions. [2023-02-15 13:13:20,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:20,007 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 432 transitions. [2023-02-15 13:13:20,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 13:13:20,008 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:20,008 INFO L195 NwaCegarLoop]: trace histogram [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 13:13:20,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-15 13:13:20,009 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:13:20,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:20,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1109218320, now seen corresponding path program 1 times [2023-02-15 13:13:20,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:20,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890261731] [2023-02-15 13:13:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:20,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:20,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:13:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:13:20,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:20,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890261731] [2023-02-15 13:13:20,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890261731] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:13:20,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:13:20,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:13:20,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156636843] [2023-02-15 13:13:20,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:13:20,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:13:20,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:20,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:13:20,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:13:20,117 INFO L87 Difference]: Start difference. First operand 332 states and 432 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 13:13:20,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:20,137 INFO L93 Difference]: Finished difference Result 350 states and 456 transitions. [2023-02-15 13:13:20,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 13:13:20,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-02-15 13:13:20,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:20,139 INFO L225 Difference]: With dead ends: 350 [2023-02-15 13:13:20,139 INFO L226 Difference]: Without dead ends: 344 [2023-02-15 13:13:20,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:13:20,140 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 1 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:20,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 374 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:13:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-02-15 13:13:20,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 338. [2023-02-15 13:13:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 253 states have (on average 1.3478260869565217) internal successors, (341), 287 states have internal predecessors, (341), 47 states have call successors, (47), 18 states have call predecessors, (47), 21 states have return successors, (53), 32 states have call predecessors, (53), 47 states have call successors, (53) [2023-02-15 13:13:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 441 transitions. [2023-02-15 13:13:20,152 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 441 transitions. Word has length 27 [2023-02-15 13:13:20,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:20,152 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 441 transitions. [2023-02-15 13:13:20,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 13:13:20,153 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 441 transitions. [2023-02-15 13:13:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 13:13:20,153 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:20,153 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:13:20,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-15 13:13:20,154 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:13:20,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:20,154 INFO L85 PathProgramCache]: Analyzing trace with hash -815173774, now seen corresponding path program 1 times [2023-02-15 13:13:20,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:20,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872811593] [2023-02-15 13:13:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:20,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:20,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:20,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872811593] [2023-02-15 13:13:20,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872811593] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:13:20,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82879849] [2023-02-15 13:13:20,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:20,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:13:20,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:13:20,658 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:13:20,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 13:13:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:20,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 13:13:20,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:13:20,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:13:20,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:13:20,992 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 17 treesize of output 9 [2023-02-15 13:13:20,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 13:13:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:21,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:13:21,169 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 34 treesize of output 28 [2023-02-15 13:13:21,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:13:21,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:13:21,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:13:21,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:13:21,218 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 28 treesize of output 24 [2023-02-15 13:13:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:13:21,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82879849] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:13:21,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:13:21,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 29 [2023-02-15 13:13:21,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266534221] [2023-02-15 13:13:21,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:13:21,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 13:13:21,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:21,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 13:13:21,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2023-02-15 13:13:21,289 INFO L87 Difference]: Start difference. First operand 338 states and 441 transitions. Second operand has 30 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 24 states have internal predecessors, (66), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:22,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:22,105 INFO L93 Difference]: Finished difference Result 395 states and 512 transitions. [2023-02-15 13:13:22,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 13:13:22,109 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 24 states have internal predecessors, (66), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-15 13:13:22,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:22,110 INFO L225 Difference]: With dead ends: 395 [2023-02-15 13:13:22,110 INFO L226 Difference]: Without dead ends: 395 [2023-02-15 13:13:22,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 13:13:22,111 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 442 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:22,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 1068 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1389 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 13:13:22,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-02-15 13:13:22,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 338. [2023-02-15 13:13:22,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 253 states have (on average 1.3438735177865613) internal successors, (340), 287 states have internal predecessors, (340), 47 states have call successors, (47), 18 states have call predecessors, (47), 21 states have return successors, (53), 32 states have call predecessors, (53), 47 states have call successors, (53) [2023-02-15 13:13:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 440 transitions. [2023-02-15 13:13:22,121 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 440 transitions. Word has length 28 [2023-02-15 13:13:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:22,122 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 440 transitions. [2023-02-15 13:13:22,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 24 states have internal predecessors, (66), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 440 transitions. [2023-02-15 13:13:22,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 13:13:22,123 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:22,123 INFO L195 NwaCegarLoop]: trace histogram [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 13:13:22,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 13:13:22,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:13:22,329 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:13:22,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:22,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1709630296, now seen corresponding path program 1 times [2023-02-15 13:13:22,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:22,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839835382] [2023-02-15 13:13:22,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:22,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:22,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:13:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:22,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:22,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839835382] [2023-02-15 13:13:22,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839835382] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:13:22,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344061824] [2023-02-15 13:13:22,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:22,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:13:22,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:13:22,789 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:13:22,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 13:13:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:22,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-15 13:13:22,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:13:22,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 13:13:22,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:13:22,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:13:22,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:13:22,956 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 21 treesize of output 20 [2023-02-15 13:13:22,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:13:22,963 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 21 treesize of output 20 [2023-02-15 13:13:23,040 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 13:13:23,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 13:13:23,101 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 21 treesize of output 21 [2023-02-15 13:13:23,115 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 21 treesize of output 21 [2023-02-15 13:13:23,125 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 21 treesize of output 21 [2023-02-15 13:13:23,140 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 21 treesize of output 21 [2023-02-15 13:13:23,177 INFO L321 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2023-02-15 13:13:23,177 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 28 treesize of output 40 [2023-02-15 13:13:23,199 INFO L321 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2023-02-15 13:13:23,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 40 [2023-02-15 13:13:23,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 102 [2023-02-15 13:13:23,980 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 32 treesize of output 16 [2023-02-15 13:13:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:24,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:13:24,316 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (v_ArrVal_893 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base| v_ArrVal_893))) (store .cse1 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) |c_ULTIMATE.start_main_~n~0#1.base|))) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (or (= (select |c_#valid| .cse0) 1) (= .cse0 0)))) (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (v_ArrVal_894 (Array Int Int)) (v_ArrVal_893 (Array Int Int))) (let ((.cse3 (+ |ULTIMATE.start_main_~tail~0#1.offset| 4))) (or (forall ((v_ArrVal_898 Int)) (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base| v_ArrVal_894))) (store .cse2 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse2 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse3 v_ArrVal_898))) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) 0)) (= (select |c_#valid| (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base| v_ArrVal_893))) (store .cse4 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse4 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse3 |c_ULTIMATE.start_main_~n~0#1.base|))) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)) 1))))) is different from false [2023-02-15 13:13:25,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:13:25,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 54 [2023-02-15 13:13:25,208 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 91 treesize of output 83 [2023-02-15 13:13:25,212 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 0 case distinctions, treesize of input 70 treesize of output 60 [2023-02-15 13:13:25,216 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 54 treesize of output 50 [2023-02-15 13:13:25,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:13:25,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 39 [2023-02-15 13:13:25,265 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 60 treesize of output 54 [2023-02-15 13:13:25,272 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:13:25,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 34 [2023-02-15 13:13:25,284 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 50 treesize of output 44 [2023-02-15 13:13:25,290 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 0 case distinctions, treesize of input 43 treesize of output 35 [2023-02-15 13:13:25,293 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:13:25,295 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 0 case distinctions, treesize of input 25 treesize of output 17 [2023-02-15 13:13:25,299 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 23 treesize of output 21 [2023-02-15 13:13:25,301 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:13:25,302 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 13:13:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:31,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344061824] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:13:31,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:13:31,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2023-02-15 13:13:31,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679394410] [2023-02-15 13:13:31,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:13:31,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 13:13:31,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:31,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 13:13:31,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=813, Unknown=7, NotChecked=58, Total=992 [2023-02-15 13:13:31,362 INFO L87 Difference]: Start difference. First operand 338 states and 440 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 13:13:46,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:46,097 INFO L93 Difference]: Finished difference Result 416 states and 521 transitions. [2023-02-15 13:13:46,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 13:13:46,098 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-02-15 13:13:46,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:46,100 INFO L225 Difference]: With dead ends: 416 [2023-02-15 13:13:46,101 INFO L226 Difference]: Without dead ends: 416 [2023-02-15 13:13:46,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=397, Invalid=1670, Unknown=7, NotChecked=88, Total=2162 [2023-02-15 13:13:46,102 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 1019 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:46,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 1062 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1176 Invalid, 0 Unknown, 147 Unchecked, 1.3s Time] [2023-02-15 13:13:46,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-02-15 13:13:46,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 338. [2023-02-15 13:13:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 253 states have (on average 1.3399209486166008) internal successors, (339), 287 states have internal predecessors, (339), 47 states have call successors, (47), 18 states have call predecessors, (47), 21 states have return successors, (53), 32 states have call predecessors, (53), 47 states have call successors, (53) [2023-02-15 13:13:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 439 transitions. [2023-02-15 13:13:46,113 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 439 transitions. Word has length 27 [2023-02-15 13:13:46,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:46,114 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 439 transitions. [2023-02-15 13:13:46,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 13:13:46,114 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 439 transitions. [2023-02-15 13:13:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 13:13:46,115 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:46,115 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:13:46,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 13:13:46,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-02-15 13:13:46,326 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:13:46,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:46,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1952238210, now seen corresponding path program 1 times [2023-02-15 13:13:46,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:46,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094879783] [2023-02-15 13:13:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:46,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:46,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 13:13:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:46,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 13:13:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 13:13:46,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:46,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094879783] [2023-02-15 13:13:46,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094879783] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:13:46,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:13:46,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:13:46,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839331620] [2023-02-15 13:13:46,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:13:46,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:13:46,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:46,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:13:46,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:13:46,376 INFO L87 Difference]: Start difference. First operand 338 states and 439 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:46,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:46,405 INFO L93 Difference]: Finished difference Result 339 states and 424 transitions. [2023-02-15 13:13:46,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 13:13:46,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-02-15 13:13:46,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:46,407 INFO L225 Difference]: With dead ends: 339 [2023-02-15 13:13:46,407 INFO L226 Difference]: Without dead ends: 339 [2023-02-15 13:13:46,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:13:46,407 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 40 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:46,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 256 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:13:46,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-02-15 13:13:46,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 326. [2023-02-15 13:13:46,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 249 states have (on average 1.3293172690763053) internal successors, (331), 279 states have internal predecessors, (331), 39 states have call successors, (39), 18 states have call predecessors, (39), 21 states have return successors, (45), 28 states have call predecessors, (45), 39 states have call successors, (45) [2023-02-15 13:13:46,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 415 transitions. [2023-02-15 13:13:46,415 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 415 transitions. Word has length 30 [2023-02-15 13:13:46,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:46,415 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 415 transitions. [2023-02-15 13:13:46,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:46,415 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 415 transitions. [2023-02-15 13:13:46,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 13:13:46,416 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:46,416 INFO L195 NwaCegarLoop]: trace histogram [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 13:13:46,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-15 13:13:46,416 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:13:46,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:46,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1439567607, now seen corresponding path program 1 times [2023-02-15 13:13:46,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:46,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703378502] [2023-02-15 13:13:46,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:46,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:46,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 13:13:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:46,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 13:13:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:46,630 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 13:13:46,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:46,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703378502] [2023-02-15 13:13:46,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703378502] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:13:46,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:13:46,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 13:13:46,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245095551] [2023-02-15 13:13:46,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:13:46,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 13:13:46,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:46,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 13:13:46,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:13:46,633 INFO L87 Difference]: Start difference. First operand 326 states and 415 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:46,823 INFO L93 Difference]: Finished difference Result 346 states and 438 transitions. [2023-02-15 13:13:46,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 13:13:46,823 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-02-15 13:13:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:46,824 INFO L225 Difference]: With dead ends: 346 [2023-02-15 13:13:46,824 INFO L226 Difference]: Without dead ends: 346 [2023-02-15 13:13:46,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-02-15 13:13:46,825 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 102 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:46,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 374 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:13:46,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-02-15 13:13:46,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 332. [2023-02-15 13:13:46,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 254 states have (on average 1.3188976377952757) internal successors, (335), 284 states have internal predecessors, (335), 40 states have call successors, (40), 18 states have call predecessors, (40), 21 states have return successors, (46), 29 states have call predecessors, (46), 40 states have call successors, (46) [2023-02-15 13:13:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 421 transitions. [2023-02-15 13:13:46,832 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 421 transitions. Word has length 30 [2023-02-15 13:13:46,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:46,833 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 421 transitions. [2023-02-15 13:13:46,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:46,833 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 421 transitions. [2023-02-15 13:13:46,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 13:13:46,833 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:46,833 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-02-15 13:13:46,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-15 13:13:46,834 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:13:46,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:46,834 INFO L85 PathProgramCache]: Analyzing trace with hash 453625093, now seen corresponding path program 1 times [2023-02-15 13:13:46,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:46,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727673586] [2023-02-15 13:13:46,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:46,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:46,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 13:13:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:46,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 13:13:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:46,970 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 13:13:46,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:46,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727673586] [2023-02-15 13:13:46,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727673586] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:13:46,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:13:46,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 13:13:46,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153187760] [2023-02-15 13:13:46,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:13:46,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 13:13:46,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:46,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 13:13:46,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:13:46,972 INFO L87 Difference]: Start difference. First operand 332 states and 421 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:47,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:47,141 INFO L93 Difference]: Finished difference Result 363 states and 455 transitions. [2023-02-15 13:13:47,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 13:13:47,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-02-15 13:13:47,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:47,143 INFO L225 Difference]: With dead ends: 363 [2023-02-15 13:13:47,144 INFO L226 Difference]: Without dead ends: 363 [2023-02-15 13:13:47,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-02-15 13:13:47,144 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 97 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:47,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 346 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:13:47,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-02-15 13:13:47,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 345. [2023-02-15 13:13:47,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 264 states have (on average 1.303030303030303) internal successors, (344), 295 states have internal predecessors, (344), 43 states have call successors, (43), 18 states have call predecessors, (43), 21 states have return successors, (49), 31 states have call predecessors, (49), 43 states have call successors, (49) [2023-02-15 13:13:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 436 transitions. [2023-02-15 13:13:47,152 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 436 transitions. Word has length 32 [2023-02-15 13:13:47,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:47,152 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 436 transitions. [2023-02-15 13:13:47,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 436 transitions. [2023-02-15 13:13:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 13:13:47,153 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:47,153 INFO L195 NwaCegarLoop]: trace histogram [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 13:13:47,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-15 13:13:47,155 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:13:47,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:47,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1579548114, now seen corresponding path program 1 times [2023-02-15 13:13:47,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:47,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196250859] [2023-02-15 13:13:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:47,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:47,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:13:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:47,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:47,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196250859] [2023-02-15 13:13:47,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196250859] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:13:47,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441018889] [2023-02-15 13:13:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:47,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:13:47,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:13:47,889 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:13:47,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 13:13:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:48,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 67 conjunts are in the unsatisfiable core [2023-02-15 13:13:48,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:13:48,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 13:13:48,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:13:48,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:13:48,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:13:48,059 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 21 treesize of output 20 [2023-02-15 13:13:48,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:13:48,064 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 21 treesize of output 20 [2023-02-15 13:13:48,124 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 13:13:48,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 13:13:48,193 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 21 treesize of output 21 [2023-02-15 13:13:48,203 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 21 treesize of output 21 [2023-02-15 13:13:48,218 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 21 treesize of output 21 [2023-02-15 13:13:48,226 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 21 treesize of output 21 [2023-02-15 13:13:48,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:13:48,283 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-02-15 13:13:48,284 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 1 case distinctions, treesize of input 28 treesize of output 34 [2023-02-15 13:13:48,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:13:48,299 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-15 13:13:48,299 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 1 case distinctions, treesize of input 28 treesize of output 30 [2023-02-15 13:13:48,493 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-02-15 13:13:48,493 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 18 [2023-02-15 13:13:48,513 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2023-02-15 13:13:48,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2023-02-15 13:13:48,544 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 22 treesize of output 10 [2023-02-15 13:13:48,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 13:13:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:48,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:13:49,295 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~tail~0#1.offset| 4))) (and (forall ((v_ArrVal_1032 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base| v_ArrVal_1032))) (store .cse0 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse1 |c_ULTIMATE.start_main_~n~0#1.offset|))) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) 0)) (forall ((v_ArrVal_1034 Int) (v_ArrVal_1033 (Array Int Int))) (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base| v_ArrVal_1033))) (store .cse2 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse2 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse1 v_ArrVal_1034))) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) 0)))) is different from false [2023-02-15 13:14:02,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:14:02,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 34 [2023-02-15 13:14:02,803 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 50 treesize of output 44 [2023-02-15 13:14:02,805 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:14:02,807 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 0 case distinctions, treesize of input 25 treesize of output 17 [2023-02-15 13:14:02,810 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:14:02,811 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 13:14:02,817 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-02-15 13:14:02,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 1 [2023-02-15 13:14:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:14:02,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441018889] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:14:02,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:14:02,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 28 [2023-02-15 13:14:02,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293342343] [2023-02-15 13:14:02,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:14:02,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 13:14:02,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:14:02,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 13:14:02,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=590, Unknown=5, NotChecked=50, Total=756 [2023-02-15 13:14:02,842 INFO L87 Difference]: Start difference. First operand 345 states and 436 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 13:14:06,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 13:14:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:14:07,116 INFO L93 Difference]: Finished difference Result 520 states and 620 transitions. [2023-02-15 13:14:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 13:14:07,116 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2023-02-15 13:14:07,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:14:07,118 INFO L225 Difference]: With dead ends: 520 [2023-02-15 13:14:07,118 INFO L226 Difference]: Without dead ends: 520 [2023-02-15 13:14:07,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=487, Invalid=1492, Unknown=5, NotChecked=86, Total=2070 [2023-02-15 13:14:07,119 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 895 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 223 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:14:07,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 1000 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1101 Invalid, 1 Unknown, 245 Unchecked, 3.1s Time] [2023-02-15 13:14:07,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2023-02-15 13:14:07,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 420. [2023-02-15 13:14:07,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 321 states have (on average 1.2866043613707165) internal successors, (413), 357 states have internal predecessors, (413), 53 states have call successors, (53), 25 states have call predecessors, (53), 29 states have return successors, (61), 37 states have call predecessors, (61), 53 states have call successors, (61) [2023-02-15 13:14:07,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 527 transitions. [2023-02-15 13:14:07,130 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 527 transitions. Word has length 31 [2023-02-15 13:14:07,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:14:07,130 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 527 transitions. [2023-02-15 13:14:07,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 13:14:07,130 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 527 transitions. [2023-02-15 13:14:07,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 13:14:07,131 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:14:07,131 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:14:07,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 13:14:07,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-15 13:14:07,337 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:14:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:14:07,338 INFO L85 PathProgramCache]: Analyzing trace with hash -575773780, now seen corresponding path program 1 times [2023-02-15 13:14:07,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:14:07,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625762126] [2023-02-15 13:14:07,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:14:07,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:14:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:14:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:14:08,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:14:08,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625762126] [2023-02-15 13:14:08,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625762126] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:14:08,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562308193] [2023-02-15 13:14:08,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:14:08,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:14:08,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:14:08,297 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:14:08,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 13:14:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:14:08,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-15 13:14:08,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:14:08,528 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 13:14:08,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 13:14:08,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:14:08,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:14:08,614 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 21 treesize of output 20 [2023-02-15 13:14:08,620 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 27 treesize of output 26 [2023-02-15 13:14:08,914 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:14:08,920 INFO L321 Elim1Store]: treesize reduction 31, result has 8.8 percent of original size [2023-02-15 13:14:08,921 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 79 treesize of output 39 [2023-02-15 13:14:08,930 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 13:14:08,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2023-02-15 13:14:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:14:08,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:14:09,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:14:09,231 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 1679 treesize of output 1428 [2023-02-15 13:14:09,242 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 1692 treesize of output 1638 [2023-02-15 13:14:16,637 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 738 treesize of output 726 [2023-02-15 13:14:16,840 INFO L321 Elim1Store]: treesize reduction 389, result has 16.5 percent of original size [2023-02-15 13:14:16,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 3970 treesize of output 3516 [2023-02-15 13:14:46,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:14:46,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 106 [2023-02-15 13:14:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:14:46,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562308193] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:14:46,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:14:46,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 13] total 38 [2023-02-15 13:14:46,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731278358] [2023-02-15 13:14:46,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:14:46,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 13:14:46,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:14:46,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 13:14:46,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 13:14:46,571 INFO L87 Difference]: Start difference. First operand 420 states and 527 transitions. Second operand has 38 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 32 states have internal predecessors, (78), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:14:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:14:50,643 INFO L93 Difference]: Finished difference Result 828 states and 1031 transitions. [2023-02-15 13:14:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-15 13:14:50,643 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 32 states have internal predecessors, (78), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-15 13:14:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:14:50,646 INFO L225 Difference]: With dead ends: 828 [2023-02-15 13:14:50,646 INFO L226 Difference]: Without dead ends: 828 [2023-02-15 13:14:50,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=579, Invalid=3581, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 13:14:50,648 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 1103 mSDsluCounter, 3701 mSDsCounter, 0 mSdLazyCounter, 4274 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 3943 SdHoareTripleChecker+Invalid, 4699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 4274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-02-15 13:14:50,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1111 Valid, 3943 Invalid, 4699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 4274 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-02-15 13:14:50,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-02-15 13:14:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 417. [2023-02-15 13:14:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 319 states have (on average 1.2852664576802508) internal successors, (410), 355 states have internal predecessors, (410), 52 states have call successors, (52), 25 states have call predecessors, (52), 29 states have return successors, (60), 36 states have call predecessors, (60), 52 states have call successors, (60) [2023-02-15 13:14:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 522 transitions. [2023-02-15 13:14:50,660 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 522 transitions. Word has length 34 [2023-02-15 13:14:50,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:14:50,661 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 522 transitions. [2023-02-15 13:14:50,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 32 states have internal predecessors, (78), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:14:50,661 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 522 transitions. [2023-02-15 13:14:50,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 13:14:50,662 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:14:50,662 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:14:50,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 13:14:50,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-15 13:14:50,868 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:14:50,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:14:50,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1173956747, now seen corresponding path program 1 times [2023-02-15 13:14:50,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:14:50,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636262270] [2023-02-15 13:14:50,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:14:50,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:14:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:14:51,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:14:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:14:51,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 13:14:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:14:51,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:14:51,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:14:51,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636262270] [2023-02-15 13:14:51,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636262270] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:14:51,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820158549] [2023-02-15 13:14:51,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:14:51,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:14:51,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:14:51,333 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:14:51,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 13:14:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:14:51,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-15 13:14:51,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:14:51,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:14:51,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:14:51,557 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 13:14:51,557 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 16 treesize of output 22 [2023-02-15 13:14:51,560 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 7 treesize of output 3 [2023-02-15 13:14:51,575 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 13:14:51,575 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 16 treesize of output 22 [2023-02-15 13:14:51,583 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 7 treesize of output 3 [2023-02-15 13:14:51,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:14:51,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 18 [2023-02-15 13:14:51,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:14:51,841 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 17 treesize of output 15 [2023-02-15 13:14:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:14:51,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:14:52,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820158549] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:14:52,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 13:14:52,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 24 [2023-02-15 13:14:52,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138163601] [2023-02-15 13:14:52,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 13:14:52,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 13:14:52,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:14:52,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 13:14:52,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2023-02-15 13:14:52,211 INFO L87 Difference]: Start difference. First operand 417 states and 522 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 24 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 13:14:54,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:14:54,029 INFO L93 Difference]: Finished difference Result 651 states and 838 transitions. [2023-02-15 13:14:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 13:14:54,029 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 24 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2023-02-15 13:14:54,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:14:54,033 INFO L225 Difference]: With dead ends: 651 [2023-02-15 13:14:54,033 INFO L226 Difference]: Without dead ends: 651 [2023-02-15 13:14:54,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=489, Invalid=2481, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 13:14:54,035 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 829 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 13:14:54,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 1172 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 13:14:54,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2023-02-15 13:14:54,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 398. [2023-02-15 13:14:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 305 states have (on average 1.259016393442623) internal successors, (384), 338 states have internal predecessors, (384), 49 states have call successors, (49), 25 states have call predecessors, (49), 29 states have return successors, (57), 34 states have call predecessors, (57), 49 states have call successors, (57) [2023-02-15 13:14:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 490 transitions. [2023-02-15 13:14:54,056 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 490 transitions. Word has length 34 [2023-02-15 13:14:54,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:14:54,056 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 490 transitions. [2023-02-15 13:14:54,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 24 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 13:14:54,056 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 490 transitions. [2023-02-15 13:14:54,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 13:14:54,058 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:14:54,058 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:14:54,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 13:14:54,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:14:54,264 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:14:54,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:14:54,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1047948467, now seen corresponding path program 1 times [2023-02-15 13:14:54,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:14:54,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792981337] [2023-02-15 13:14:54,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:14:54,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:14:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:14:54,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:14:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:14:54,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 13:14:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:14:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:14:54,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:14:54,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792981337] [2023-02-15 13:14:54,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792981337] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:14:54,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158777358] [2023-02-15 13:14:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:14:54,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:14:54,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:14:54,625 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:14:54,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 13:14:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:14:54,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-15 13:14:54,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:14:54,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:14:54,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:14:54,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:14:54,904 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 21 treesize of output 20 [2023-02-15 13:14:54,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:14:54,913 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 21 treesize of output 20 [2023-02-15 13:14:54,965 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 13:14:54,966 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 37 treesize of output 36 [2023-02-15 13:14:54,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:14:54,972 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 27 treesize of output 27 [2023-02-15 13:14:55,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-02-15 13:14:55,516 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:14:55,517 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 1 case distinctions, treesize of input 41 treesize of output 21 [2023-02-15 13:14:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:14:55,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:14:55,668 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2023-02-15 13:14:55,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-02-15 13:14:55,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158777358] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:14:55,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 13:14:55,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 29 [2023-02-15 13:14:55,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530450305] [2023-02-15 13:14:55,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 13:14:55,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 13:14:55,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:14:55,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 13:14:55,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 13:14:55,788 INFO L87 Difference]: Start difference. First operand 398 states and 490 transitions. Second operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:14:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:14:58,344 INFO L93 Difference]: Finished difference Result 600 states and 751 transitions. [2023-02-15 13:14:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 13:14:58,345 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2023-02-15 13:14:58,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:14:58,347 INFO L225 Difference]: With dead ends: 600 [2023-02-15 13:14:58,347 INFO L226 Difference]: Without dead ends: 600 [2023-02-15 13:14:58,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=668, Invalid=3238, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 13:14:58,348 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 1047 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1047 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 2051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:14:58,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1047 Valid, 1262 Invalid, 2051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-15 13:14:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2023-02-15 13:14:58,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 309. [2023-02-15 13:14:58,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 234 states have (on average 1.2735042735042734) internal successors, (298), 261 states have internal predecessors, (298), 37 states have call successors, (37), 21 states have call predecessors, (37), 24 states have return successors, (43), 26 states have call predecessors, (43), 37 states have call successors, (43) [2023-02-15 13:14:58,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 378 transitions. [2023-02-15 13:14:58,361 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 378 transitions. Word has length 36 [2023-02-15 13:14:58,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:14:58,361 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 378 transitions. [2023-02-15 13:14:58,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:14:58,361 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 378 transitions. [2023-02-15 13:14:58,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 13:14:58,362 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:14:58,362 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:14:58,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 13:14:58,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:14:58,573 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:14:58,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:14:58,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1047948466, now seen corresponding path program 1 times [2023-02-15 13:14:58,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:14:58,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604882562] [2023-02-15 13:14:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:14:58,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:14:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:14:58,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:14:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:14:59,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 13:14:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:14:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:14:59,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:14:59,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604882562] [2023-02-15 13:14:59,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604882562] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:14:59,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729514251] [2023-02-15 13:14:59,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:14:59,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:14:59,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:14:59,058 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:14:59,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 13:14:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:14:59,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-15 13:14:59,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:14:59,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:14:59,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:14:59,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:14:59,341 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 21 treesize of output 20 [2023-02-15 13:14:59,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:14:59,347 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 21 treesize of output 20 [2023-02-15 13:14:59,414 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 13:14:59,414 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 28 treesize of output 29 [2023-02-15 13:14:59,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:14:59,420 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 27 treesize of output 27 [2023-02-15 13:15:00,084 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 41 treesize of output 25 [2023-02-15 13:15:00,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:15:00,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2023-02-15 13:15:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:15:00,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:15:00,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:15:00,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2023-02-15 13:15:00,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729514251] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:15:00,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 13:15:00,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 28 [2023-02-15 13:15:00,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211787744] [2023-02-15 13:15:00,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 13:15:00,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 13:15:00,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:15:00,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 13:15:00,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 13:15:00,365 INFO L87 Difference]: Start difference. First operand 309 states and 378 transitions. Second operand has 29 states, 27 states have (on average 2.259259259259259) internal successors, (61), 28 states have internal predecessors, (61), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:15:04,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:15:04,435 INFO L93 Difference]: Finished difference Result 517 states and 640 transitions. [2023-02-15 13:15:04,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 13:15:04,435 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.259259259259259) internal successors, (61), 28 states have internal predecessors, (61), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2023-02-15 13:15:04,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:15:04,437 INFO L225 Difference]: With dead ends: 517 [2023-02-15 13:15:04,437 INFO L226 Difference]: Without dead ends: 515 [2023-02-15 13:15:04,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=740, Invalid=3952, Unknown=0, NotChecked=0, Total=4692 [2023-02-15 13:15:04,438 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 1171 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 2148 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1171 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 2148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-15 13:15:04,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1171 Valid, 1204 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 2148 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-15 13:15:04,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-02-15 13:15:04,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 312. [2023-02-15 13:15:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 238 states have (on average 1.2647058823529411) internal successors, (301), 263 states have internal predecessors, (301), 37 states have call successors, (37), 22 states have call predecessors, (37), 24 states have return successors, (43), 26 states have call predecessors, (43), 37 states have call successors, (43) [2023-02-15 13:15:04,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 381 transitions. [2023-02-15 13:15:04,446 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 381 transitions. Word has length 36 [2023-02-15 13:15:04,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:15:04,447 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 381 transitions. [2023-02-15 13:15:04,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.259259259259259) internal successors, (61), 28 states have internal predecessors, (61), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:15:04,447 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 381 transitions. [2023-02-15 13:15:04,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 13:15:04,448 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:15:04,448 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-02-15 13:15:04,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-15 13:15:04,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-02-15 13:15:04,656 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:15:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:15:04,657 INFO L85 PathProgramCache]: Analyzing trace with hash -770373048, now seen corresponding path program 1 times [2023-02-15 13:15:04,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:15:04,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772817560] [2023-02-15 13:15:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:04,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:15:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:04,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:15:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:04,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 13:15:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:15:04,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:15:04,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772817560] [2023-02-15 13:15:04,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772817560] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:15:04,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296331101] [2023-02-15 13:15:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:04,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:15:04,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:15:04,889 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:15:04,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 13:15:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:05,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 13:15:05,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:15:05,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:15:05,126 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 20 treesize of output 8 [2023-02-15 13:15:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:15:05,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:15:05,152 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 32 treesize of output 26 [2023-02-15 13:15:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:15:05,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296331101] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:15:05,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:15:05,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2023-02-15 13:15:05,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113305559] [2023-02-15 13:15:05,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:15:05,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 13:15:05,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:15:05,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 13:15:05,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-02-15 13:15:05,180 INFO L87 Difference]: Start difference. First operand 312 states and 381 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 13:15:07,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:09,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:11,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:13,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:15,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:17,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:19,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:21,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:23,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:25,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:27,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:29,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:31,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:33,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:35,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:37,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:39,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:41,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:15:41,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:15:41,555 INFO L93 Difference]: Finished difference Result 331 states and 385 transitions. [2023-02-15 13:15:41,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 13:15:41,556 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2023-02-15 13:15:41,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:15:41,559 INFO L225 Difference]: With dead ends: 331 [2023-02-15 13:15:41,559 INFO L226 Difference]: Without dead ends: 331 [2023-02-15 13:15:41,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-02-15 13:15:41,566 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 274 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 29 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:15:41,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 741 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 419 Invalid, 18 Unknown, 0 Unchecked, 36.3s Time] [2023-02-15 13:15:41,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-02-15 13:15:41,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 299. [2023-02-15 13:15:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 251 states have internal predecessors, (286), 35 states have call successors, (35), 22 states have call predecessors, (35), 24 states have return successors, (41), 25 states have call predecessors, (41), 35 states have call successors, (41) [2023-02-15 13:15:41,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 362 transitions. [2023-02-15 13:15:41,579 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 362 transitions. Word has length 36 [2023-02-15 13:15:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:15:41,579 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 362 transitions. [2023-02-15 13:15:41,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 13:15:41,580 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 362 transitions. [2023-02-15 13:15:41,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 13:15:41,580 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:15:41,580 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:15:41,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-15 13:15:41,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:15:41,789 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:15:41,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:15:41,789 INFO L85 PathProgramCache]: Analyzing trace with hash 712532890, now seen corresponding path program 1 times [2023-02-15 13:15:41,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:15:41,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128167783] [2023-02-15 13:15:41,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:41,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:15:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:41,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 13:15:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:41,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 13:15:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:41,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 13:15:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 13:15:41,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:15:41,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128167783] [2023-02-15 13:15:41,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128167783] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:15:41,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:15:41,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 13:15:41,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163000419] [2023-02-15 13:15:41,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:15:41,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:15:41,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:15:41,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:15:41,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:15:41,870 INFO L87 Difference]: Start difference. First operand 299 states and 362 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 13:15:41,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:15:41,905 INFO L93 Difference]: Finished difference Result 309 states and 372 transitions. [2023-02-15 13:15:41,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:15:41,906 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-02-15 13:15:41,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:15:41,908 INFO L225 Difference]: With dead ends: 309 [2023-02-15 13:15:41,908 INFO L226 Difference]: Without dead ends: 309 [2023-02-15 13:15:41,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:15:41,908 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 5 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:15:41,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 426 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:15:41,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-02-15 13:15:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 293. [2023-02-15 13:15:41,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 223 states have (on average 1.2600896860986548) internal successors, (281), 246 states have internal predecessors, (281), 34 states have call successors, (34), 21 states have call predecessors, (34), 23 states have return successors, (40), 25 states have call predecessors, (40), 34 states have call successors, (40) [2023-02-15 13:15:41,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 355 transitions. [2023-02-15 13:15:41,916 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 355 transitions. Word has length 40 [2023-02-15 13:15:41,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:15:41,917 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 355 transitions. [2023-02-15 13:15:41,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 13:15:41,917 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 355 transitions. [2023-02-15 13:15:41,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 13:15:41,918 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:15:41,918 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:15:41,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-15 13:15:41,918 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:15:41,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:15:41,919 INFO L85 PathProgramCache]: Analyzing trace with hash 318176130, now seen corresponding path program 1 times [2023-02-15 13:15:41,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:15:41,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307695905] [2023-02-15 13:15:41,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:41,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:15:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:42,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:15:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:42,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-15 13:15:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:15:42,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:15:42,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307695905] [2023-02-15 13:15:42,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307695905] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:15:42,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306823952] [2023-02-15 13:15:42,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:42,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:15:42,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:15:42,665 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:15:42,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 13:15:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:42,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 13:15:42,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:15:42,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 13:15:42,873 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 13:15:42,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 13:15:42,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:15:44,950 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~x~0#1.base_BEFORE_CALL_19| Int)) (not (= |v_ULTIMATE.start_main_~x~0#1.base_BEFORE_CALL_19| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~x~0#1.base_BEFORE_CALL_19|) 4)))) is different from true [2023-02-15 13:15:45,076 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 13:15:45,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2023-02-15 13:15:45,290 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:15:45,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:15:45,293 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 27 treesize of output 16 [2023-02-15 13:15:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:15:45,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:15:45,366 INFO L321 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2023-02-15 13:15:45,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 13:15:45,371 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1557 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_remove_#t~mem4#1.base| v_ArrVal_1557) |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 4)) |c_ULTIMATE.start_remove_#t~mem4#1.base|)) is different from false [2023-02-15 13:15:45,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306823952] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:15:45,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 13:15:45,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-02-15 13:15:45,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364463574] [2023-02-15 13:15:45,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 13:15:45,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 13:15:45,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:15:45,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 13:15:45,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=831, Unknown=2, NotChecked=118, Total=1056 [2023-02-15 13:15:45,526 INFO L87 Difference]: Start difference. First operand 293 states and 355 transitions. Second operand has 27 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 27 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:15:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:15:46,780 INFO L93 Difference]: Finished difference Result 317 states and 375 transitions. [2023-02-15 13:15:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 13:15:46,781 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 27 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2023-02-15 13:15:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:15:46,782 INFO L225 Difference]: With dead ends: 317 [2023-02-15 13:15:46,783 INFO L226 Difference]: Without dead ends: 317 [2023-02-15 13:15:46,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=311, Invalid=1857, Unknown=2, NotChecked=182, Total=2352 [2023-02-15 13:15:46,784 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 289 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 13:15:46,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 863 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 992 Invalid, 0 Unknown, 187 Unchecked, 0.6s Time] [2023-02-15 13:15:46,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-02-15 13:15:46,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 293. [2023-02-15 13:15:46,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 223 states have (on average 1.2556053811659194) internal successors, (280), 246 states have internal predecessors, (280), 34 states have call successors, (34), 21 states have call predecessors, (34), 23 states have return successors, (40), 25 states have call predecessors, (40), 34 states have call successors, (40) [2023-02-15 13:15:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 354 transitions. [2023-02-15 13:15:46,790 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 354 transitions. Word has length 40 [2023-02-15 13:15:46,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:15:46,791 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 354 transitions. [2023-02-15 13:15:46,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 27 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:15:46,791 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 354 transitions. [2023-02-15 13:15:46,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 13:15:46,792 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:15:46,792 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:15:46,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 13:15:46,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:15:46,997 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:15:46,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:15:46,997 INFO L85 PathProgramCache]: Analyzing trace with hash 318176131, now seen corresponding path program 1 times [2023-02-15 13:15:46,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:15:46,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413982601] [2023-02-15 13:15:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:46,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:15:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:47,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:15:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:47,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-15 13:15:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:15:47,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:15:47,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413982601] [2023-02-15 13:15:47,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413982601] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:15:47,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613980738] [2023-02-15 13:15:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:47,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:15:47,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:15:47,637 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:15:47,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 13:15:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:47,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-15 13:15:47,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:15:47,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 13:15:47,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 13:15:47,833 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 13:15:47,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 13:15:47,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:15:47,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:15:48,095 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 13:15:48,096 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 42 treesize of output 41 [2023-02-15 13:15:48,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:15:48,102 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 20 treesize of output 22 [2023-02-15 13:15:48,226 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 25 treesize of output 13 [2023-02-15 13:15:48,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2023-02-15 13:15:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:15:48,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:15:48,359 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 4))) (and (forall ((v_ArrVal_1645 (Array Int Int)) (v_ArrVal_1644 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_remove_#t~mem4#1.base| v_ArrVal_1645) |c_ULTIMATE.start_main_~x~0#1.base|) .cse0) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_remove_#t~mem4#1.base| v_ArrVal_1644) |c_ULTIMATE.start_main_~x~0#1.base|) .cse0)))) (forall ((v_ArrVal_1645 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_remove_#t~mem4#1.base| v_ArrVal_1645) |c_ULTIMATE.start_main_~x~0#1.base|) .cse0))))) is different from false [2023-02-15 13:15:48,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613980738] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:15:48,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 13:15:48,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2023-02-15 13:15:48,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917273782] [2023-02-15 13:15:48,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 13:15:48,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 13:15:48,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:15:48,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 13:15:48,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=696, Unknown=1, NotChecked=54, Total=870 [2023-02-15 13:15:48,560 INFO L87 Difference]: Start difference. First operand 293 states and 354 transitions. Second operand has 23 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 23 states have internal predecessors, (70), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 13:15:49,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:15:49,651 INFO L93 Difference]: Finished difference Result 335 states and 387 transitions. [2023-02-15 13:15:49,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 13:15:49,651 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 23 states have internal predecessors, (70), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2023-02-15 13:15:49,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:15:49,652 INFO L225 Difference]: With dead ends: 335 [2023-02-15 13:15:49,652 INFO L226 Difference]: Without dead ends: 335 [2023-02-15 13:15:49,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=269, Invalid=1066, Unknown=1, NotChecked=70, Total=1406 [2023-02-15 13:15:49,653 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 429 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 13:15:49,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 836 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 13:15:49,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2023-02-15 13:15:49,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 293. [2023-02-15 13:15:49,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 223 states have (on average 1.251121076233184) internal successors, (279), 246 states have internal predecessors, (279), 34 states have call successors, (34), 21 states have call predecessors, (34), 23 states have return successors, (40), 25 states have call predecessors, (40), 34 states have call successors, (40) [2023-02-15 13:15:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 353 transitions. [2023-02-15 13:15:49,659 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 353 transitions. Word has length 40 [2023-02-15 13:15:49,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:15:49,659 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 353 transitions. [2023-02-15 13:15:49,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 23 states have internal predecessors, (70), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 13:15:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 353 transitions. [2023-02-15 13:15:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 13:15:49,661 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:15:49,661 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:15:49,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 13:15:49,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-15 13:15:49,873 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:15:49,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:15:49,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1343891098, now seen corresponding path program 1 times [2023-02-15 13:15:49,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:15:49,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803162090] [2023-02-15 13:15:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:49,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:15:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:49,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 13:15:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:49,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 13:15:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:49,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 13:15:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:49,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 13:15:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 13:15:49,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:15:49,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803162090] [2023-02-15 13:15:49,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803162090] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:15:49,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:15:49,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:15:49,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378749810] [2023-02-15 13:15:49,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:15:49,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:15:49,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:15:49,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:15:49,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:15:49,947 INFO L87 Difference]: Start difference. First operand 293 states and 353 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 13:15:50,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:15:50,020 INFO L93 Difference]: Finished difference Result 296 states and 356 transitions. [2023-02-15 13:15:50,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:15:50,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2023-02-15 13:15:50,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:15:50,022 INFO L225 Difference]: With dead ends: 296 [2023-02-15 13:15:50,022 INFO L226 Difference]: Without dead ends: 267 [2023-02-15 13:15:50,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:15:50,023 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:15:50,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 189 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:15:50,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-02-15 13:15:50,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2023-02-15 13:15:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 202 states have (on average 1.2722772277227723) internal successors, (257), 224 states have internal predecessors, (257), 31 states have call successors, (31), 19 states have call predecessors, (31), 21 states have return successors, (37), 23 states have call predecessors, (37), 31 states have call successors, (37) [2023-02-15 13:15:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 325 transitions. [2023-02-15 13:15:50,032 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 325 transitions. Word has length 43 [2023-02-15 13:15:50,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:15:50,033 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 325 transitions. [2023-02-15 13:15:50,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 13:15:50,033 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 325 transitions. [2023-02-15 13:15:50,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 13:15:50,034 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:15:50,034 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:15:50,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-02-15 13:15:50,034 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:15:50,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:15:50,035 INFO L85 PathProgramCache]: Analyzing trace with hash -982902293, now seen corresponding path program 1 times [2023-02-15 13:15:50,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:15:50,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251071072] [2023-02-15 13:15:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:50,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:15:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:50,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:15:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:50,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 13:15:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:50,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 13:15:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:15:50,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:15:50,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251071072] [2023-02-15 13:15:50,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251071072] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:15:50,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164077059] [2023-02-15 13:15:50,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:50,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:15:50,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:15:50,175 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:15:50,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 13:15:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:50,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 13:15:50,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:15:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 13:15:50,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:15:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 13:15:50,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164077059] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:15:50,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:15:50,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 14 [2023-02-15 13:15:50,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865377237] [2023-02-15 13:15:50,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:15:50,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 13:15:50,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:15:50,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 13:15:50,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-02-15 13:15:50,434 INFO L87 Difference]: Start difference. First operand 267 states and 325 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 13:15:50,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:15:50,683 INFO L93 Difference]: Finished difference Result 258 states and 310 transitions. [2023-02-15 13:15:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 13:15:50,683 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 42 [2023-02-15 13:15:50,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:15:50,684 INFO L225 Difference]: With dead ends: 258 [2023-02-15 13:15:50,684 INFO L226 Difference]: Without dead ends: 258 [2023-02-15 13:15:50,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-02-15 13:15:50,684 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 349 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:15:50,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 473 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:15:50,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-02-15 13:15:50,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 251. [2023-02-15 13:15:50,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 193 states have (on average 1.2642487046632125) internal successors, (244), 211 states have internal predecessors, (244), 27 states have call successors, (27), 16 states have call predecessors, (27), 18 states have return successors, (33), 23 states have call predecessors, (33), 27 states have call successors, (33) [2023-02-15 13:15:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 304 transitions. [2023-02-15 13:15:50,692 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 304 transitions. Word has length 42 [2023-02-15 13:15:50,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:15:50,692 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 304 transitions. [2023-02-15 13:15:50,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 13:15:50,692 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 304 transitions. [2023-02-15 13:15:50,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 13:15:50,693 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:15:50,693 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:15:50,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 13:15:50,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-15 13:15:50,902 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:15:50,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:15:50,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2033128158, now seen corresponding path program 1 times [2023-02-15 13:15:50,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:15:50,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821299859] [2023-02-15 13:15:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:50,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:15:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:51,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:15:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:51,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 13:15:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:51,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 13:15:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 13:15:51,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:15:51,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821299859] [2023-02-15 13:15:51,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821299859] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:15:51,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:15:51,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 13:15:51,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544117961] [2023-02-15 13:15:51,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:15:51,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 13:15:51,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:15:51,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 13:15:51,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:15:51,030 INFO L87 Difference]: Start difference. First operand 251 states and 304 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 13:15:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:15:51,078 INFO L93 Difference]: Finished difference Result 281 states and 337 transitions. [2023-02-15 13:15:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 13:15:51,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2023-02-15 13:15:51,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:15:51,080 INFO L225 Difference]: With dead ends: 281 [2023-02-15 13:15:51,080 INFO L226 Difference]: Without dead ends: 281 [2023-02-15 13:15:51,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-15 13:15:51,081 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 7 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:15:51,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 512 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:15:51,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-02-15 13:15:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 273. [2023-02-15 13:15:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 207 states have (on average 1.2463768115942029) internal successors, (258), 226 states have internal predecessors, (258), 31 states have call successors, (31), 19 states have call predecessors, (31), 22 states have return successors, (39), 27 states have call predecessors, (39), 31 states have call successors, (39) [2023-02-15 13:15:51,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 328 transitions. [2023-02-15 13:15:51,099 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 328 transitions. Word has length 47 [2023-02-15 13:15:51,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:15:51,099 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 328 transitions. [2023-02-15 13:15:51,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 13:15:51,100 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 328 transitions. [2023-02-15 13:15:51,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 13:15:51,101 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:15:51,101 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:15:51,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-02-15 13:15:51,102 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:15:51,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:15:51,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1984961000, now seen corresponding path program 1 times [2023-02-15 13:15:51,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:15:51,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676902430] [2023-02-15 13:15:51,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:51,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:15:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:51,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:15:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:51,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-15 13:15:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:15:51,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:15:51,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676902430] [2023-02-15 13:15:51,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676902430] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:15:51,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460550347] [2023-02-15 13:15:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:51,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:15:51,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:15:51,485 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:15:51,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 13:15:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:51,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-15 13:15:51,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:15:51,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:15:51,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:15:51,728 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 21 treesize of output 20 [2023-02-15 13:15:51,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:15:51,852 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 21 treesize of output 21 [2023-02-15 13:15:51,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:15:51,867 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 21 treesize of output 21 [2023-02-15 13:15:51,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:15:51,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-02-15 13:15:51,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:15:52,134 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 13:15:52,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 35 [2023-02-15 13:15:52,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:15:52,139 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 27 treesize of output 27 [2023-02-15 13:15:52,477 INFO L321 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2023-02-15 13:15:52,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 46 [2023-02-15 13:15:52,495 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2023-02-15 13:15:52,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2023-02-15 13:15:52,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:15:52,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 86 [2023-02-15 13:15:52,901 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 32 treesize of output 16 [2023-02-15 13:15:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:15:52,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:15:53,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460550347] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:15:53,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 13:15:53,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 30 [2023-02-15 13:15:53,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770590011] [2023-02-15 13:15:53,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 13:15:53,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 13:15:53,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:15:53,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 13:15:53,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 13:15:53,183 INFO L87 Difference]: Start difference. First operand 273 states and 328 transitions. Second operand has 31 states, 30 states have (on average 2.7) internal successors, (81), 31 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:15:55,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:15:55,612 INFO L93 Difference]: Finished difference Result 318 states and 365 transitions. [2023-02-15 13:15:55,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 13:15:55,612 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.7) internal successors, (81), 31 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2023-02-15 13:15:55,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:15:55,613 INFO L225 Difference]: With dead ends: 318 [2023-02-15 13:15:55,613 INFO L226 Difference]: Without dead ends: 318 [2023-02-15 13:15:55,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=475, Invalid=2717, Unknown=0, NotChecked=0, Total=3192 [2023-02-15 13:15:55,614 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 377 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:15:55,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 1007 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-15 13:15:55,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-02-15 13:15:55,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 273. [2023-02-15 13:15:55,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 207 states have (on average 1.2415458937198067) internal successors, (257), 226 states have internal predecessors, (257), 31 states have call successors, (31), 19 states have call predecessors, (31), 22 states have return successors, (39), 27 states have call predecessors, (39), 31 states have call successors, (39) [2023-02-15 13:15:55,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 327 transitions. [2023-02-15 13:15:55,621 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 327 transitions. Word has length 45 [2023-02-15 13:15:55,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:15:55,621 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 327 transitions. [2023-02-15 13:15:55,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.7) internal successors, (81), 31 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:15:55,622 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 327 transitions. [2023-02-15 13:15:55,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 13:15:55,624 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:15:55,624 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:15:55,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 13:15:55,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-15 13:15:55,832 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:15:55,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:15:55,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1984960999, now seen corresponding path program 1 times [2023-02-15 13:15:55,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:15:55,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108799178] [2023-02-15 13:15:55,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:55,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:15:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:56,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:15:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:56,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-15 13:15:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:15:56,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:15:56,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108799178] [2023-02-15 13:15:56,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108799178] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:15:56,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68420836] [2023-02-15 13:15:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:56,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:15:56,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:15:56,373 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:15:56,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 13:15:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:56,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 13:15:56,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:15:56,741 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 13:15:56,741 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 19 treesize of output 26 [2023-02-15 13:15:56,752 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-02-15 13:15:56,753 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 19 treesize of output 18 [2023-02-15 13:15:56,894 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 23 treesize of output 11 [2023-02-15 13:15:56,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2023-02-15 13:15:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:15:56,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 13:15:56,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68420836] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:15:56,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 13:15:56,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 20 [2023-02-15 13:15:56,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079603547] [2023-02-15 13:15:56,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:15:56,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 13:15:56,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:15:56,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 13:15:56,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-02-15 13:15:56,920 INFO L87 Difference]: Start difference. First operand 273 states and 327 transitions. Second operand has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:15:57,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:15:57,675 INFO L93 Difference]: Finished difference Result 296 states and 348 transitions. [2023-02-15 13:15:57,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 13:15:57,675 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2023-02-15 13:15:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:15:57,676 INFO L225 Difference]: With dead ends: 296 [2023-02-15 13:15:57,676 INFO L226 Difference]: Without dead ends: 296 [2023-02-15 13:15:57,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 13:15:57,677 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 199 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 13:15:57,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 541 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 13:15:57,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-02-15 13:15:57,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 273. [2023-02-15 13:15:57,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 207 states have (on average 1.2367149758454106) internal successors, (256), 226 states have internal predecessors, (256), 31 states have call successors, (31), 19 states have call predecessors, (31), 22 states have return successors, (39), 27 states have call predecessors, (39), 31 states have call successors, (39) [2023-02-15 13:15:57,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 326 transitions. [2023-02-15 13:15:57,684 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 326 transitions. Word has length 45 [2023-02-15 13:15:57,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:15:57,684 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 326 transitions. [2023-02-15 13:15:57,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:15:57,684 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 326 transitions. [2023-02-15 13:15:57,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 13:15:57,685 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:15:57,685 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:15:57,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 13:15:57,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:15:57,892 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:15:57,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:15:57,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1746455468, now seen corresponding path program 1 times [2023-02-15 13:15:57,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:15:57,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594723319] [2023-02-15 13:15:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:57,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:15:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:58,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:15:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:58,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 13:15:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:15:58,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:15:58,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594723319] [2023-02-15 13:15:58,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594723319] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:15:58,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414968940] [2023-02-15 13:15:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:58,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:15:58,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:15:58,720 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:15:58,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 13:15:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:58,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 112 conjunts are in the unsatisfiable core [2023-02-15 13:15:58,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:15:58,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:15:58,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:15:58,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 13:15:58,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:15:58,999 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 21 treesize of output 20 [2023-02-15 13:15:59,017 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 13:15:59,017 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 16 treesize of output 22 [2023-02-15 13:15:59,021 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 7 treesize of output 3 [2023-02-15 13:15:59,074 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 13:15:59,075 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 20 treesize of output 26 [2023-02-15 13:15:59,089 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 13:15:59,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:15:59,102 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:15:59,108 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-02-15 13:15:59,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2023-02-15 13:15:59,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2023-02-15 13:15:59,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:15:59,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:15:59,173 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:15:59,181 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-02-15 13:15:59,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 39 [2023-02-15 13:16:00,012 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:16:00,031 INFO L321 Elim1Store]: treesize reduction 64, result has 26.4 percent of original size [2023-02-15 13:16:00,031 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 135 treesize of output 93 [2023-02-15 13:16:00,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:16:00,050 INFO L321 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2023-02-15 13:16:00,050 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 59 [2023-02-15 13:16:00,426 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:16:00,448 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:16:00,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 141 treesize of output 163 [2023-02-15 13:16:00,959 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-02-15 13:16:00,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 22 [2023-02-15 13:16:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:16:01,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:16:03,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414968940] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:16:03,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 13:16:03,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26] total 43 [2023-02-15 13:16:03,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222557548] [2023-02-15 13:16:03,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 13:16:03,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 13:16:03,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:16:03,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 13:16:03,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2630, Unknown=0, NotChecked=0, Total=2862 [2023-02-15 13:16:03,059 INFO L87 Difference]: Start difference. First operand 273 states and 326 transitions. Second operand has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 40 states have internal predecessors, (83), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:16:11,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:16:11,696 INFO L93 Difference]: Finished difference Result 647 states and 773 transitions. [2023-02-15 13:16:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-02-15 13:16:11,697 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 40 states have internal predecessors, (83), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2023-02-15 13:16:11,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:16:11,699 INFO L225 Difference]: With dead ends: 647 [2023-02-15 13:16:11,699 INFO L226 Difference]: Without dead ends: 647 [2023-02-15 13:16:11,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4217 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1546, Invalid=12974, Unknown=0, NotChecked=0, Total=14520 [2023-02-15 13:16:11,703 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 1604 mSDsluCounter, 1788 mSDsCounter, 0 mSdLazyCounter, 3279 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1604 SdHoareTripleChecker+Valid, 1897 SdHoareTripleChecker+Invalid, 3702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 3279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-02-15 13:16:11,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1604 Valid, 1897 Invalid, 3702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 3279 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-02-15 13:16:11,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2023-02-15 13:16:11,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 361. [2023-02-15 13:16:11,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 276 states have (on average 1.2318840579710144) internal successors, (340), 298 states have internal predecessors, (340), 42 states have call successors, (42), 26 states have call predecessors, (42), 30 states have return successors, (52), 36 states have call predecessors, (52), 42 states have call successors, (52) [2023-02-15 13:16:11,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 434 transitions. [2023-02-15 13:16:11,714 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 434 transitions. Word has length 49 [2023-02-15 13:16:11,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:16:11,714 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 434 transitions. [2023-02-15 13:16:11,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 40 states have internal predecessors, (83), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:16:11,715 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 434 transitions. [2023-02-15 13:16:11,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 13:16:11,716 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:16:11,716 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:16:11,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 13:16:11,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-02-15 13:16:11,923 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:16:11,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:16:11,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1297083730, now seen corresponding path program 1 times [2023-02-15 13:16:11,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:16:11,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722919074] [2023-02-15 13:16:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:16:11,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:16:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:11,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:16:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:11,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 13:16:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:11,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 13:16:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:11,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 13:16:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 13:16:11,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:16:11,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722919074] [2023-02-15 13:16:11,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722919074] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:16:11,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:16:11,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:16:11,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450833429] [2023-02-15 13:16:11,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:16:11,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:16:11,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:16:11,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:16:11,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:16:11,997 INFO L87 Difference]: Start difference. First operand 361 states and 434 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 13:16:12,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:16:12,127 INFO L93 Difference]: Finished difference Result 361 states and 429 transitions. [2023-02-15 13:16:12,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:16:12,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2023-02-15 13:16:12,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:16:12,129 INFO L225 Difference]: With dead ends: 361 [2023-02-15 13:16:12,129 INFO L226 Difference]: Without dead ends: 361 [2023-02-15 13:16:12,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:16:12,130 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 102 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:16:12,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 159 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:16:12,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2023-02-15 13:16:12,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 360. [2023-02-15 13:16:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 276 states have (on average 1.210144927536232) internal successors, (334), 297 states have internal predecessors, (334), 42 states have call successors, (42), 26 states have call predecessors, (42), 30 states have return successors, (52), 36 states have call predecessors, (52), 42 states have call successors, (52) [2023-02-15 13:16:12,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 428 transitions. [2023-02-15 13:16:12,150 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 428 transitions. Word has length 50 [2023-02-15 13:16:12,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:16:12,150 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 428 transitions. [2023-02-15 13:16:12,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 13:16:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 428 transitions. [2023-02-15 13:16:12,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 13:16:12,151 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:16:12,151 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:16:12,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-02-15 13:16:12,152 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:16:12,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:16:12,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1297083731, now seen corresponding path program 1 times [2023-02-15 13:16:12,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:16:12,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447938088] [2023-02-15 13:16:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:16:12,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:16:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:12,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:16:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:12,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 13:16:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:12,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 13:16:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:12,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 13:16:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 13:16:12,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:16:12,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447938088] [2023-02-15 13:16:12,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447938088] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:16:12,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:16:12,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:16:12,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131279510] [2023-02-15 13:16:12,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:16:12,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:16:12,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:16:12,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:16:12,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:16:12,278 INFO L87 Difference]: Start difference. First operand 360 states and 428 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 13:16:12,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:16:12,428 INFO L93 Difference]: Finished difference Result 359 states and 416 transitions. [2023-02-15 13:16:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 13:16:12,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2023-02-15 13:16:12,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:16:12,429 INFO L225 Difference]: With dead ends: 359 [2023-02-15 13:16:12,430 INFO L226 Difference]: Without dead ends: 359 [2023-02-15 13:16:12,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:16:12,430 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 96 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:16:12,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 173 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:16:12,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-02-15 13:16:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 356. [2023-02-15 13:16:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 276 states have (on average 1.1594202898550725) internal successors, (320), 293 states have internal predecessors, (320), 42 states have call successors, (42), 26 states have call predecessors, (42), 30 states have return successors, (52), 36 states have call predecessors, (52), 42 states have call successors, (52) [2023-02-15 13:16:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 414 transitions. [2023-02-15 13:16:12,438 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 414 transitions. Word has length 50 [2023-02-15 13:16:12,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:16:12,439 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 414 transitions. [2023-02-15 13:16:12,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 13:16:12,439 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 414 transitions. [2023-02-15 13:16:12,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 13:16:12,440 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:16:12,440 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:16:12,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-02-15 13:16:12,441 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:16:12,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:16:12,441 INFO L85 PathProgramCache]: Analyzing trace with hash -144300065, now seen corresponding path program 1 times [2023-02-15 13:16:12,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:16:12,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106766469] [2023-02-15 13:16:12,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:16:12,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:16:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:12,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:16:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:12,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 13:16:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:12,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 13:16:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:12,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 13:16:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 13:16:12,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:16:12,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106766469] [2023-02-15 13:16:12,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106766469] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:16:12,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880417600] [2023-02-15 13:16:12,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:16:12,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:16:12,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:16:12,800 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:16:12,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 13:16:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:12,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-15 13:16:12,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:16:13,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:16:13,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:16:13,096 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 21 treesize of output 20 [2023-02-15 13:16:13,113 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 13:16:13,113 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 14 treesize of output 20 [2023-02-15 13:16:13,119 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 13:16:13,266 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 19 treesize of output 11 [2023-02-15 13:16:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 13:16:13,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:16:13,568 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 24 treesize of output 12 [2023-02-15 13:16:13,695 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 10 treesize of output 4 [2023-02-15 13:16:13,987 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:16:13,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2023-02-15 13:16:13,990 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 30 treesize of output 22 [2023-02-15 13:16:13,993 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 13:16:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 13:16:14,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880417600] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:16:14,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:16:14,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 19] total 44 [2023-02-15 13:16:14,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473763898] [2023-02-15 13:16:14,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:16:14,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 13:16:14,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:16:14,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 13:16:14,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1700, Unknown=1, NotChecked=0, Total=1892 [2023-02-15 13:16:14,115 INFO L87 Difference]: Start difference. First operand 356 states and 414 transitions. Second operand has 44 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 44 states have internal predecessors, (98), 10 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 13:16:15,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:16:15,495 INFO L93 Difference]: Finished difference Result 307 states and 342 transitions. [2023-02-15 13:16:15,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 13:16:15,495 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 44 states have internal predecessors, (98), 10 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) Word has length 54 [2023-02-15 13:16:15,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:16:15,496 INFO L225 Difference]: With dead ends: 307 [2023-02-15 13:16:15,496 INFO L226 Difference]: Without dead ends: 303 [2023-02-15 13:16:15,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=746, Invalid=4083, Unknown=1, NotChecked=0, Total=4830 [2023-02-15 13:16:15,497 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 813 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 13:16:15,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 704 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 13:16:15,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-02-15 13:16:15,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 197. [2023-02-15 13:16:15,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 157 states have (on average 1.1528662420382165) internal successors, (181), 167 states have internal predecessors, (181), 18 states have call successors, (18), 13 states have call predecessors, (18), 14 states have return successors, (20), 16 states have call predecessors, (20), 18 states have call successors, (20) [2023-02-15 13:16:15,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 219 transitions. [2023-02-15 13:16:15,503 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 219 transitions. Word has length 54 [2023-02-15 13:16:15,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:16:15,503 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 219 transitions. [2023-02-15 13:16:15,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 44 states have internal predecessors, (98), 10 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 13:16:15,504 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 219 transitions. [2023-02-15 13:16:15,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 13:16:15,504 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:16:15,504 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:16:15,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 13:16:15,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-15 13:16:15,712 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-02-15 13:16:15,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:16:15,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1295856623, now seen corresponding path program 1 times [2023-02-15 13:16:15,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:16:15,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795216921] [2023-02-15 13:16:15,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:16:15,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:16:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:16,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 13:16:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:16,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-15 13:16:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:16,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-15 13:16:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:16,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-15 13:16:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 13:16:16,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:16:16,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795216921] [2023-02-15 13:16:16,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795216921] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:16:16,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998583566] [2023-02-15 13:16:16,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:16:16,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:16:16,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:16:16,397 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:16:16,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 13:16:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:16,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 13:16:16,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:16:16,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 13:16:16,636 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 13:16:16,636 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 11 treesize of output 11 [2023-02-15 13:16:16,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:16:17,478 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 13:16:17,479 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 33 treesize of output 34 [2023-02-15 13:16:19,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:16:19,661 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 30 treesize of output 20 [2023-02-15 13:16:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:16:21,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:16:24,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998583566] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:16:24,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 13:16:24,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2023-02-15 13:16:24,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912205758] [2023-02-15 13:16:24,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 13:16:24,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 13:16:24,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:16:24,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 13:16:24,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=717, Unknown=2, NotChecked=0, Total=812 [2023-02-15 13:16:24,553 INFO L87 Difference]: Start difference. First operand 197 states and 219 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 13:16:26,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:16:28,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:16:30,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:16:32,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 13:16:34,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]